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The Party 1994: Try This At Home
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1995-04-18
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/* NOTE: This is just a complition of all the source code files. This file
can not be compiled. Use the original files instead! */
;=============================================================================
; flag.asm - Runtime Flag Demostration.
; File created: 10-22-93
; Copyright (C) 1993, Carlos Hasan Last modified: 10-22-93
;
; Description:
; This file implements a runtime flag movement using plasma like
; sinus overlapping waves in the VGA 320x200x256 graphics mode.
;
; Portability:
; Requires Turbo Assembler 3.2 or better to be assembler.
; Dependent on the IBM PC 286 and the VGA graphics card.
;=============================================================================
.model small,pascal
.286
dosseg ; used to link like
.stack 1024 ; an standalone program.
global FlagDemo:proc
;======================= Demo equates and data ===============================
TIMEOUT equ 70 * 8 ; at least 8 secs.
BMPWIDTH equ 160 ; bitmap dimens.
BMPHEIGHT equ 96
MAXWIDTH equ 320 ; screen dimens.
MAXHEIGHT equ 200
XOFS equ 80 ; flag upper left
YOFS equ 30 ; corner coordinates.
.data
; flag bitmap, palette and sinus wave tables.
; The bitmap is about 15K, but because it's highly compressed using
; any exepacker, it was included in the data segment avoiding the
; extra segment needed in the demo algorithms.
include flagbmp.inc
HWavPos db ? ; wave horiz and vert
VWavPos db ? ; positions.
FadePalette db 768 dup (?) ; faded palette.
Fade db ? ; fade level.
Esckey db ? ; true if key pressed.
Timer dw ? ; timer counter.
;======================= Demo routines =======================================
.code
;-----------------------------------------------------------------------------
; WaitVRT - Waits the Vertical Retrace.
;-----------------------------------------------------------------------------
WaitVRT proc near
mov dx,3DAh
WaitVR1: in al,dx
test al,8
jne WaitVR1
WaitVR2: in al,dx
test al,8
je WaitVR2
ret
WaitVRT endp
;-----------------------------------------------------------------------------
; SetPalette - set the CX entries of the VGA color palette.
; In:
; DS:SI - Palette structure address.
; CX - Number of colors components.
;-----------------------------------------------------------------------------
SetPalette proc near
call WaitVRT
mov dx,3C8h
xor al,al
out dx,al
inc dx
rep outsb
ret
SetPalette endp
;-----------------------------------------------------------------------------
; PutFlag - Writes the next Flag Frame to the Screen.
;-----------------------------------------------------------------------------
PutFlag proc near
mov ax,0A000h
mov es,ax
add [HWavPos],4 ; Incr Wave Positions.
add [VWavPos],7
mov dh,[HWavPos] ; k = hwavpos.
mov di,MAXWIDTH*YOFS+XOFS ; p = screen offset.
lea si,[Piccy] ; q = piccy offset.
mov cx,BMPWIDTH-16 ; for col=0 to W-16 do
xor bh,bh
ColLoop: push cx
push si
push di
mov bl,dh
mov dl,[VWave+bx] ; x = vwave[k]
mov al,[HWave+bx] ; h = (x+hwave[k])/2
add al,dl
rcr al,1
mov ah,BMPWIDTH ; q= col+160*h
mul ah
add si,ax
mov ah,[VWavPos] ; l = vwavpos
mov cx,BMPHEIGHT-16 ; for row=0 to H-16 do
RowLoop: mov bl,ah
mov bl,[VWave+bx] ; v = (x+vwave[l])/2
add bl,dl
rcr bl,1
mov al,[si+bx] ; al = pic[si+v]+vwave[k+v]
add bl,dh
mov bl,[VWave+bx]
xor bl,0Fh
add al,bl
mov es:[di],al ; put pixel.
add di,MAXWIDTH ; p= p+320
add si,BMPWIDTH ; q= q+160
inc ah ; l= l+1
loop RowLoop
pop di
pop si
pop cx
inc dh ; k=k+1
inc si ; q=q+1
inc di ; p=p+1
test di,1 ; if odd(p) p=p+320
jne ColBrk
add di,MAXWIDTH
ColBrk: loop ColLoop ; next col.
ret
PutFlag endp
;-----------------------------------------------------------------------------
; FlagDemo - Performs the demonstration.
; In:
; DS - Data segment.
;-----------------------------------------------------------------------------
FlagDemo proc
pusha
push ds
push es
mov ax,0013h ; set 320x200x256 mode.
int 10h
mov [Fade],0 ; setup variables.
mov [EscKey],0
mov [Timer],0
mov [HWavPos],0
mov [VWavPos],0
FlagLoop: cmp [EscKey],0 ; change fade level.
jne FadeOut
FadeIn: mov bl,[Fade]
cmp bl,64
jae SkipFade
inc [Fade]
jmp FadeInOut
FadeOut: mov bl,[Fade]
cmp bl,0
jbe FadeInOut
dec [Fade]
FadeInOut: lea si,[Palette] ; set faded palette.
lea di,[FadePalette]
mov cx,3*16*4
mov ax,ds
mov es,ax
cld
FadeLoop: lodsb
mul bl
shr ax,6
stosb
loop FadeLoop
DoFade: lea si,[FadePalette] ; ensures thats always
mov cx,3*16*4 ; waits the VR per frame.
call SetPalette
jmp DoFlag
SkipFade: call WaitVRT
DoFlag: call PutFlag ; put the flag.
mov ah,1 ; if any key pressed,
int 16h
jz CheckTimer
mov ah,0
int 16h
jmp BeginFadeOut
CheckTimer: inc [Timer] ; or timeout,
cmp [Timer],TIMEOUT
jb CheckExit
BeginFadeOut: inc [EscKey] ; then fade-out and exit.
CheckExit: cmp [Fade],0
je FlagExit
jmp FlagLoop
FlagExit: mov ax,0003h
int 10h
pop es
pop ds
popa
ret
FlagDemo endp
;-----------------------------------------------------------------------------
; Start - Startup code called from DOS.
; In:
; DS - Program Segment Prefix.
;-----------------------------------------------------------------------------
Start proc
mov ax,@Data
mov ds,ax
call FlagDemo
mov ax,4C00h
int 21h
Start endp
end Start
;=============================================================================
; mandel.asm - Mandelbrot Set calculation Routines.
; File created: 9-22-93
; Copyright (C) 1993, Carlos Hasan Last modified: 10-11-93
;
; Description:
; This file implements the Mandelbrot Set fractal using a fast algorithm
; based on the Fracint's Boundary trace method. The drawing is optimized
; for using with VGA 320x200x256 graphics mode.
;
; Portability:
; Requires Turbo Assembler 3.2 or better to be assembler.
; Dependent on the IBM PC 386 or later microprocessor.
;=============================================================================
.model small,pascal
.386
global DrawMandel:proc
;======================= Mandelbrot Routine ==================================
;-----------------------------------------------------------------------------
; Equates for Mandelbrot Set calculation.
;-----------------------------------------------------------------------------
MAXITER equ 150 ; max iterations
FUDGE equ 24 ; fudge factor
BAILOUT equ 4 shl FUDGE ; bait out
PERIODMASK equ 0FFFF0000h ; periodicy mask
;-----------------------------------------------------------------------------
; Miscellaneus Data used for calculation.
;-----------------------------------------------------------------------------
.data
SavedAnd dw ?
SavedIncr dw ?
SavedMask dd ?
OldIter dw ?
LinX dd ?
LinY dd ?
SavedX dd ?
SavedY dd ?
;-----------------------------------------------------------------------------
; CalcMand - Main Mandelbrot Set calculation routine.
; In:
; ESI - real part of the initial complex value.
; EDI - imaginary part of the initial complex value.
; Out:
; AL - Mandelbrot level.
; Modified:
; EAX, EBX, ECX, EDX, ESI, EDI, Flags.
;-----------------------------------------------------------------------------
.code
CalcMand proc near
mov [SavedAnd],1 ; init periodicy check.
mov [SavedIncr],1
mov [SavedMask],1
mov [SavedX],0FFFFFFFFh ; values impossibles
mov [SavedY],0FFFFFFFFh ; for x and y.
mov [LinX],esi ; linx = real
mov [LinY],edi ; liny = imag
xor esi,esi ; x = 0
xor edi,edi ; y = 0
mov cx,MAXITER ; iter = maxiter
MandLoop: mov eax,esi ; ebx = x*x
imul esi
shrd eax,edx,FUDGE
mov ebx,eax
mov eax,edi ; ebx = y*y
imul edi
shrd eax,edx,FUDGE
mov edx,ebx ; edx = x*x + y*y
add edx,eax
sub ebx,eax ; ebx = x*x - y*y
cmp edx,BAILOUT ; x*x + y*y > bailout?
jge MandBreak ; break.
mov eax,edi ; y = 2*x*y + liny
imul esi
shrd eax,edx,FUDGE-1
add eax,[LinY]
mov edi,eax
add ebx,[LinX] ; x = x*x - y*y + linx
mov esi,ebx
cmp [OldIter],cx ; check periodicity.
jle MandContinue
mov eax,esi
xor eax,[SavedX]
test eax,PERIODMASK
jne CheckSave
mov eax,edi
xor eax,[SavedY]
test eax,PERIODMASK
jne CheckSave
xor cx,cx
jmp MandBreak
CheckSave: test cx,[SavedAnd]
jne MandContinue
mov [SavedX],esi
mov [SavedY],edi
dec [SavedIncr]
jne MandContinue
stc
rcl [SavedAnd],1
mov [SavedIncr],4
MandContinue: dec cx
jne MandLoop
MandBreak: mov ax,cx
mov bx,cx
sub bx,10
test cx,cx
je SetOldIter
mov bx,MAXITER
SetOldIter: mov [OldIter],bx
ret
CalcMand endp
;=================== Boundary Trace Method (BTM) =============================
;-----------------------------------------------------------------------------
; Equates for BTM into a 320x200x256 virtual screen.
;-----------------------------------------------------------------------------
MAXWIDTH equ 320 ; Virtual screen dimensions.
MAXHEIGHT equ 200
XSTART equ 0 ; Virtual screen drawing
XSTOP equ 319 ; window coordinates.
YSTART equ 0
YSTOP equ 199
NORTH equ 0 ; Used for BTM algorithm.
EAST equ 1
SOUTH equ 2
WEST equ 3
MAXINT equ 7FFFh
;-----------------------------------------------------------------------------
; Data used for BTM during plotting.
;-----------------------------------------------------------------------------
.data
LeftX dw MAXHEIGHT dup (?) ; array of left and right
RightX dw MAXHEIGHT dup (?) ; limits for poly filling.
ComplexX dd MAXWIDTH dup (?) ; translate screen coords
ComplexY dd MAXHEIGHT dup (?) ; to complex coords.
FirstX dw ? ; temporary variables used
FirstY dw ? ; for BTM algorithm.
Iters dw ?
Color db ?
Dir db ?
;-----------------------------------------------------------------------------
; GetPixel - get the pixel color at specified location.
; In:
; ES - Virtual screen segment.
; (SI,DI) - Pixel position.
; Out:
; AL - Pixel color.
; Modified:
; BX, Flags.
;-----------------------------------------------------------------------------
.code
GetPixel macro
mov bx,di
imul bx,MAXWIDTH
add bx,si
mov al,es:[bx]
endm
;-----------------------------------------------------------------------------
; PutPixel - put the pixel color at specified location.
; In:
; ES - Virtual screen segment.
; (SI,DI) - Pixel position.
; AL - Pixel color.
; Modified:
; BX, Flags.
;-----------------------------------------------------------------------------
PutPixel macro
mov bx,di
imul bx,MAXWIDTH
add bx,si
mov es:[bx],al
endm
;-----------------------------------------------------------------------------
; GetColor - get the pixel color using the MandelBrot Set routine or
; the virtual screen if already painted.
; In:
; ES - Virtual screen segment.
; (SI,DI) - Pixel position.
; Out:
; AL - Pixel color.
; Modified:
; EAX, EBX, ECX, EDX, Flags.
;-----------------------------------------------------------------------------
GetColor proc near
GetPixel
test al,al
jne ColorNonZero
push si
push di
shl si,2
shl di,2
mov esi,[ComplexX+si]
mov edi,[ComplexY+di]
call CalcMand
pop di
pop si
inc al
PutPixel ; don't destroy AL.
ColorNonZero: ret
GetColor endp
;-----------------------------------------------------------------------------
; BoundTrace - Trace a boundary and fill it.
; In:
; ES - Virtual screen segment.
; (SI,DI) - starting point inside of the boundary.
; Modified:
; EAX, EBX, ECX, EDX, Flags.
;-----------------------------------------------------------------------------
BoundTrace proc near
mov [FirstX],si
mov [FirstY],di
call GetColor
mov [Color],al
mov [Dir],EAST
mov [Iters],0
BoundLoop: mov bx,di
shl bx,1
cmp si,[LeftX+bx]
jge NotLess
mov [LeftX+bx],si
NotLess: cmp si,[RightX+bx]
jle NotGreat
mov [RightX+bx],si
NotGreat: mov al,[Dir]
cmp al,NORTH
je GoNorth
cmp al,EAST
je GoEast
cmp al,SOUTH
je GoSouth
cmp al,WEST
je GoWest
GoNorth: cmp di,[FirstY]
jle SetEast
dec di
call GetColor
inc di
cmp al,[Color]
jne SetEast
dec di
cmp si,XSTART
jle BoundContinue
dec si
call GetColor
inc si
cmp al,[Color]
jne BoundContinue
dec si
jmp SetWest
GoEast: cmp si,XSTOP
jge SetSouth
inc si
call GetColor
dec si
cmp al,[Color]
jne SetSouth
inc si
cmp di,[FirstY]
jle BoundContinue
dec di
call GetColor
inc di
cmp al,[Color]
jne BoundContinue
dec di
jmp SetNorth
GoSouth: cmp di,YSTOP
jge SetWest
inc di
call GetColor
dec di
cmp al,[Color]
jne SetWest
inc di
cmp si,XSTOP
jge BoundContinue
inc si
call GetColor
dec si
cmp al,[Color]
jne BoundContinue
inc si
jmp SetEast
GoWest: cmp si,XSTART
jle SetNorth
dec si
call GetColor
inc si
cmp al,[Color]
jne SetNorth
dec si
cmp di,YSTOP
jge BoundContinue
inc di
call GetColor
dec di
cmp al,[Color]
jne BoundContinue
inc di
jmp SetSouth
SetNorth: mov [Dir],NORTH
jmp BoundContinue
SetEast: mov [Dir],EAST
jmp BoundContinue
SetSouth: mov [Dir],SOUTH
jmp BoundContinue
SetWest: mov [Dir],WEST
BoundContinue: inc [Iters]
cmp si,[FirstX]
jne BoundLoop
cmp di,[FirstY]
jne BoundLoop
cmp [Iters],4
jl BoundExit
mov si,[FirstY]
cld
BoundForY: mov bx,si
shl bx,1
mov ax,[LeftX+bx]
mov dx,[RightX+bx]
mov [LeftX+bx],+MAXINT
mov [RightX+bx],-MAXINT
cmp ax,dx
jg BoundExit
mov cx,dx
sub cx,ax
inc cx
mov di,si
imul di,MAXWIDTH
add di,ax
mov al,[Color]
ScanColor: repne scasb
jne BoundNextY
jcxz BoundNextY
FillBlank: mov ah,es:[di]
test ah,ah
jne ScanColor
mov es:[di],al
inc di
dec cx
jne FillBlank
BoundNextY: inc si
cmp si,YSTOP
jle BoundForY
BoundExit: mov si,[FirstX]
mov di,[FirstY]
ret
BoundTrace endp
;-----------------------------------------------------------------------------
; DrawMandel - Draw the Mandelbrot Set into a virtual 320x200x256 screen.
; In:
; (PosX,PosX) - top left corner complex number.
; (DeltaX,DeltaY) - complex windows extends.
; ScreenSeg - Virtual screen segment.
;-----------------------------------------------------------------------------
DrawMandel proc PosX:dword,PosY:dword, \
DeltaX:dword,DeltaY:dword, ScreenSeg:word
mov ax,ds
mov es,ax
cld
mov cx,MAXHEIGHT
lea di,[LeftX]
mov ax,+MAXINT
rep stosw
mov cx,MAXHEIGHT
lea di,[RightX]
mov ax,-MAXINT
rep stosw
mov ecx,XSTOP-XSTART
mov eax,[DeltaX]
cdq
div ecx
inc cx
mov edx,eax
add eax,[PosX]
add eax,[PosX]
sar eax,1
lea di,[ComplexX]
MakeX: stosd
add eax,edx
loop MakeX
mov ecx,YSTOP-YSTART
mov eax,[DeltaY]
cdq
div ecx
inc cx
mov edx,eax
add eax,[PosY]
add eax,[PosY]
sar eax,1
lea di,[ComplexY]
MakeY: stosd
add eax,edx
loop MakeY
mov ax,[ScreenSeg]
mov es,ax
mov cx,MAXWIDTH * MAXHEIGHT
xor di,di
xor ax,ax
rep stosb
mov di,YSTART
ForY: mov si,XSTART
ForX: GetPixel
test al,al
jne NextX
call BoundTrace
NextX: inc si
cmp si,XSTOP
jle ForX
NextY: inc di
cmp di,YSTOP
jle ForY
ret
DrawMandel endp
end
;=============================================================================
; zoom.asm - Mandelbrot Set Zoom Demostration.
; File created: 10-11-93
; Copyright (C) 1993, Carlos Hasan Last modified: 11-21-93
;
; Description:
; This file implements the Runtime MandelZoom demostration. Needs the
; Mandelbrot Set calculation routines and the zoom-in path include file.
;
; Portability:
; Requires Turbo Assembler 3.2 or better to be assembler.
; Dependent on the IBM PC 386 and the VGA graphics card.
;
; Modifications:
; 10/22/93 - Startup Code.
; 11/21/93 - Now this thing Shows the Frame Creation.
;=============================================================================
.model small,pascal
.386
dosseg ; used to link like
.stack 1024 ; an standalone program.
global MandelZoom:proc
global DrawMandel:proc ; in MANDEL.ASM
;===================== Demo Equates ==========================================
MAXWIDTH equ 320 ; VGA Screen Dimensions.
MAXHEIGHT equ 200
;===================== Demo Data =============================================
.data
include ZoomPath.Inc ; Zoom-In Information.
; and Color Palette.
GridX dw WINSIZEX dup (?) ; Used to compute the
GridY dw WINSIZEY dup (?) ; Zoom-In Window.
;===================== Demo Routines =========================================
.code
;-----------------------------------------------------------------------------
; WaitVRT - Waits the next VGA Vertical Retrace Period.
;-----------------------------------------------------------------------------
WaitVRT proc near
mov dx,3DAh
WaitVRT1: in al,dx
test al,8
jz WaitVRT1
WaitVRT2: in al,dx
test al,8
jnz WaitVRT2
ret
WaitVRT endp
;-----------------------------------------------------------------------------
; BlackPalette - Set a Black Palette.
;-----------------------------------------------------------------------------
BlackPalette proc near
call WaitVRT
mov dx,3C8h
xor al,al
out dx,al
inc dx
mov cx,768
BlackLoop: out dx,al
loop BlackLoop
ret
BlackPalette endp
;-----------------------------------------------------------------------------
; SetPalette - Sets the Color Palette.
;-----------------------------------------------------------------------------
SetPalette proc near
call WaitVRT
mov dx,3C8h
xor al,al
out dx,al
inc dx
lea si,[Palette]
mov cx,768
rep outsb
ret
SetPalette endp
;-----------------------------------------------------------------------------
; FadeInPalette - Fade-In the palette.
;-----------------------------------------------------------------------------
FadeInPalette proc near
xor bx,bx
FadeInLoop: lea si,[Palette]
mov dx,3C8h
xor al,al
out dx,al
mov cx,768
call WaitVRT
mov dx,3C9h
FadeIn: lodsb
mul bl
mov al,ah
out dx,al
loop FadeIn
add bl,4
jnc FadeInLoop
ret
FadeInPalette endp
;-----------------------------------------------------------------------------
; FadeOutPalette - Fade-Out the palette.
;-----------------------------------------------------------------------------
FadeOutPalette proc near
mov bl,252
FadeOutLoop: call WaitVRT
mov dx,3C8h
xor al,al
out dx,al
inc dx
lea si,[Palette]
mov cx,768
FadeOut: lodsb
mul bl
mov al,ah
out dx,al
loop FadeOut
sub bl,4
jnc FadeOutLoop
ret
FadeOutPalette endp
;-----------------------------------------------------------------------------
; ClearScreen - Clears the Video Screen using a Spray-like effect.
;-----------------------------------------------------------------------------
ClearScreen proc near
push ds
push es
mov ax,0A000h
mov es,ax
xor cx,cx
SprayLoop: push cx
xor bx,bx
SprayLine: push bx
mov ah,cs:[RandTable+bx]
mov bx,cx
mov al,cs:[RandTable+bx]
mov bx,ax
mov di,ax
xor al,al
mov es:[di],al
pop bx
inc cl
inc bl
jne SprayLine
pop cx
inc cl
jne SprayLoop
pop es
pop ds
ret
RandTable label byte
db 83, 8, 18, 177, 13, 241, 149, 157
db 75, 248, 254, 23, 16, 66, 207, 31
db 211, 183, 80, 242, 218, 27, 15, 128
db 94, 98, 4, 36, 139, 110, 85, 230
db 212, 26, 12, 249, 169, 233, 200, 150
db 95, 114, 130, 167, 202, 187, 76, 145
db 62, 117, 115, 190, 209, 42, 185, 224
db 129, 104, 108, 192, 174, 137, 44, 41
db 141, 53, 179, 81, 181, 57, 147, 210
db 50, 134, 156, 125, 133, 126, 106, 162
db 20, 59, 84, 0, 151, 143, 101, 215
db 68, 246, 189, 197, 99, 213, 112, 144
db 28, 235, 240, 90, 154, 56, 138, 165
db 19, 166, 159, 92, 127, 208, 105, 118
db 119, 153, 191, 184, 87, 70, 9, 164
db 60, 252, 96, 3, 171, 38, 136, 14
db 7, 160, 71, 146, 102, 229, 227, 43
db 221, 182, 217, 30, 131, 219, 61, 180
db 195, 245, 109, 203, 24, 49, 170, 247
db 46, 148, 122, 250, 173, 107, 255, 194
db 6, 37, 93, 22, 168, 97, 193, 5
db 51, 223, 116, 86, 1, 89, 121, 243
db 140, 220, 39, 222, 65, 55, 17, 54
db 175, 206, 214, 155, 142, 163, 25, 188
db 178, 11, 204, 135, 201, 238, 79, 132
db 198, 40, 21, 45, 237, 253, 152, 74
db 32, 111, 52, 47, 236, 2, 176, 239
db 234, 58, 100, 91, 172, 73, 82, 205
db 34, 88, 78, 231, 232, 225, 48, 251
db 67, 123, 244, 29, 216, 64, 196, 69
db 199, 33, 72, 35, 10, 63, 161, 228
db 113, 158, 120, 103, 124, 186, 226, 77
ClearScreen endp
;-----------------------------------------------------------------------------
; ZoomBox - Draws the Zoom Window using the precalculated Mandelbrot
; pictures and coordinates in the ZoomPath include file.
;-----------------------------------------------------------------------------
ZoomBox proc near XStart:word,YStart:word,XStop:word,YStop:word, \
PicSeg:word
mov si,[XStart] ; compute the GridX array.
mov di,[XStop]
lea bx,[GridX]
mov cx,WINSIZEX
mov ax,di
sub ax,si
cwd
div cx
xchg si,ax
mov di,dx
mov dx,cx
shr dx,1
neg dx
MakeGridX: mov [bx],ax
add ax,si
add dx,di
jl SkipX
sub dx,WINSIZEX
inc ax
SkipX: add bx,2
loop MakeGridX
mov si,[YStart] ; compute the GridY array.
mov di,[YStop]
lea bx,[GridY]
mov cx,WINSIZEY
mov ax,di
sub ax,si
cwd
div cx
xchg si,ax
mov di,dx
mov dx,cx
shr dx,1
neg dx
MakeGridY: mov [bx],ax
add ax,si
add dx,di
jl SkipY
sub dx,WINSIZEY
inc ax
SkipY: add bx,2
loop MakeGridY
mov dx,[PicSeg]
mov cx,ds
mov ax,0A000h
mov es,ax
mov di,WINPOSX+320*WINPOSY
cld
xor bx,bx
ZoomLoopY: push bx
mov ax,[GridY+bx]
imul ax,ax,MAXWIDTH
xor bx,bx
ZoomLoopX: mov si,ax
add si,[GridX+bx]
mov ds,dx
movsb
mov ds,cx
add bx,2
cmp bx,2*WINSIZEX
jb ZoomLoopX
pop bx
add di,MAXWIDTH-WINSIZEX
add bx,2
cmp bx,2*WINSIZEY
jb ZoomLoopY
ret
ZoomBox endp
;-----------------------------------------------------------------------------
; MandelZoom - Performs the demonstration. Because this routine is called
; from a High-Level language the allocation and deallocation of memory
; is done by the caller.
; In:
; MemSegs - Array of NUMPICS segments of 64K to store the pictures.
;-----------------------------------------------------------------------------
MandelZoom proc MemSegs:dword
mov ax,13h ; set VGA 320x200x256 mode.
int 10h
call SetPalette ; Sets Color Palette
les si,[MemSegs] ; Creates the Mandelbrot
mov cx,NUMPICS ; piccys into the virtual
xor bx,bx ; screens.
MakePics: pusha
push ds
push es
mov eax,[bx+PicTable+0] ; get fixedpoint X,Y,DX,DY.
mov edx,[bx+PicTable+4]
mov esi,[bx+PicTable+8]
mov edi,[bx+PicTable+12] ; Draw Mandelbrot Set.
call DrawMandel,eax,edx,esi,edi,0A000h
pop es
pop ds
popa
pusha ; Copy Picture:
push ds
push es
mov ax,0A000h ; get screen segment
mov ds,ax
mov es,es:[si] ; get vscreen segment
xor di,di
xor si,si
mov cx,32000 ; copy screen
cld
rep movsw
call ClearScreen ; clears screen
pop es
pop ds
popa
add si,2 ; Next Picture Gap.
add bx,16
loop MakePics
call BlackPalette ; set Black Palette.
DemoLoop:
mov cx,NUMFRAMES ; Zoom-In.
xor bx,bx
ZoomIN: call WaitVRT
push bx
push cx
les si,[MemSegs]
mov ax,[bx+FrameTable+8] ; PicNo.
add si,ax
add si,ax
mov cx,es:[si] ; PicSeg.
mov ax,[bx+FrameTable+0] ; XStart.
mov dx,[bx+FrameTable+2] ; YStart.
mov si,[bx+FrameTable+4] ; XStop.
mov di,[bx+FrameTable+6] ; YStop.
call ZoomBox,ax,dx,si,di,cx
pop cx
pop bx
test bx,bx
jne DontFadeIn
push bx
push cx
call FadeInPalette
pop cx
pop bx
DontFadeIn: add bx,10
loop ZoomIN
mov cx,NUMFRAMES ; Zoom-Out.
mov bx,10*NUMFRAMES-10
ZoomOUT: call WaitVRT
push bx
push cx
les si,[MemSegs]
mov ax,[bx+FrameTable+8] ; PicNo.
add si,ax
add si,ax
mov cx,es:[si] ; PicSeg.
mov ax,[bx+FrameTable+0] ; XStart.
mov dx,[bx+FrameTable+2] ; YStart.
mov si,[bx+FrameTable+4] ; XStop.
mov di,[bx+FrameTable+6] ; YStop.
call ZoomBox,ax,dx,si,di,cx
pop cx
pop bx
test bx,bx
jne DontFadeOut
push bx
push cx
call FadeOutPalette
pop cx
pop bx
DontFadeOut: sub bx,10
loop ZoomOUT
mov ax,03h ; set VGA 80x25x16 mode.
int 10h
ret
MandelZoom endp
;-----------------------------------------------------------------------------
; Start - Startup Code called from DOS.
; In:
; ES - Program Segment Prefix.
;-----------------------------------------------------------------------------
Start proc
local PicSegs:word:NUMPICS
mov ax,@Data
mov ds,ax
mov ax,ss ; shrink memory block.
mov bx,es
sub ax,bx
mov bx,sp
shr bx,4
inc bx
add bx,ax
mov ah,4Ah
int 21h
lea bx,[PicSegs]
mov cx,NUMPICS
AllocLoop: push bx
push cx
mov ah,48h ; alloc 64000 bytes per
mov bx,4000 ; picture.
int 21h
jc Exit
pop cx
pop bx
mov ss:[bx],ax
add bx,2
loop AllocLoop
lea bx,[PicSegs] ; do demostration.
call MandelZoom,ss,bx
lea bx,[PicSegs]
mov cx,NUMPICS ; Free 64000 bytes
FreeLoop: push bx ; per picture.
push cx
mov ah,49h
mov es,ss:[bx]
int 21h
pop cx
pop bx
add bx,2
loop FreeLoop
Exit: mov ax,4C00h
int 21h
Start endp
end Start
;=============================================================================
; flame.asm - Plasma-Like Flames Demo.
; File created: 11/22/93
; Copyright (c) 1993, Carlos Hasan Last modified: 11/22/93
;
; Description:
; Plasma Like Flames effect based on Vangelis Fire Code.
;
; Portability:
; Requires Turbo Assembler 3.2 or later to be assembled.
; Dependant on the IBM PC 286 or better processor.
;=============================================================================
ideal
model small
jumps
p286
dosseg
stack 1024
ends
global FontFAR:byte ; FLAMES.FNT linked file.
;=========================== VLA Font Header =================================
struc FontHeader
Magic db "VGACH" ; Font Signature
First db ? ; First Char
Width db ? ; Font Width
Height db ? ; Font Height
Total db ? ; Number of Chars
ends FontHeader
;======================== Equates and Data Segment ===========================
TIMEOUT equ 70*50 ; At Least 50 secs
MESGSPEED equ 20 ; Message Speed in VR Ticks
FLSEED equ 4 ; Initial Flames Seed
FLBLANK equ 100 ; Ending Flames Seed (Blank Screen)
XDOTS equ 80 ; VGA Screen Dimensions
YDOTS equ 80
HIDDEN equ 8 ; Number of Hidden Working Lines
dataseg
label Palette byte ; Flames RGB Palette:
I=0 ; black to blue
rept 8
db 0,0,2*I
I=I+1
endm
I=0 ; blue to darkred
rept 8
db 2*I,0,16-2*I
I=I+1
endm
I=0 ; darkred to lightred
rept 24
db 16+47*I/24,0,0
I=I+1
endm
I=0 ; lighred to yellow
rept 32
db 63,31*I/16,0
I=I+1
endm
I=0 ; yellow to white
rept 24
db 63,63,21*I/8
I=I+1
endm
rept 160 ; white
db 63,63,63
endm
Frame dw XDOTS*(YDOTS+HIDDEN) dup(?) ; Flames Frame Buffer
Seed dw 1234h ; Random Seed
FontDataOfs dw ? ; Font Data Address
FontDataSeg dw ?
FontWidths db 256 dup (?) ; Font Char Widths
FontFirst db ? ; Font First Char
FontWidth db ? ; Font Max Width
FontHeight db ? ; Font Height
FontSize dw ? ; Font BitMap Size (=Width*Height)
MesgOff dw offset TheMessage ; Message Offset
TheMessage db " FAKE DEMO CODED BY PELUSA MUSIC BY NECROS"
db " GREETS GO TO ALL THE PC DEMO PEOPLE..."
db " THANKS FOR WATCHING THIS LAME THING..."
db " SEEING YA........ "
db 0
;============================ Code Segment ===================================
codeseg
;-----------------------------------------------------------------------------
; SetModeX - Sets VGA Tweaked Mode 80x80x256.
;-----------------------------------------------------------------------------
proc SetModeX
mov ax,0013h ; Set VGA Linear 320x200x256
int 10h
mov dx,3C4h ; Disable Chain-Four
mov ax,0604h
out dx,ax
mov dx,3C4h ; Enable Write to All Four Planes
mov ax,0F02h
out dx,ax
mov ax,0A000h ; Clear Display Memory
mov es,ax
xor di,di
xor ax,ax
mov cx,8000h
cld
rep stosw
mov dx,3D4h ; Reprogram CRT Controller:
mov ax,00014h ; turn off dword mode
out dx,ax
mov ax,0e317h ; turn on byte mode
out dx,ax
mov ax,00409h ; cell height
out dx,ax
ret
endp SetModeX
;-----------------------------------------------------------------------------
; WaitVR - Waits Vertical Retrace.
;-----------------------------------------------------------------------------
proc WaitVR
mov dx,3DAh
WaitStartVR:
in al,dx
test al,8
je WaitStartVR
WaitEndVR:
in al,dx
test al,8
jne WaitEndVR
ret
endp WaitVR
;-----------------------------------------------------------------------------
; LoadFont - Loads the VLA font.
;-----------------------------------------------------------------------------
proc LoadFont
mov ax,SEG FontFAR ; Load Font File Address
mov es,ax
mov [FontDataSeg],ax
mov [FontDataOfs],Size FontHeader
mov al,[es:FontHeader.First] ; Get Font First Char
mov [FontFirst],al
mov al,[es:FontHeader.Width] ; Get Font Data Size
mov ah,[es:FontHeader.Height]
mov [FontWidth],al
mov [FontHeight],ah
mul ah
mov [FontSize],ax
mov dl,[es:FontHeader.Total]
xor dh,dh
mul dx
add ax,Size FontHeader ; Copy Font Widths.
mov si,ax
xor di,di
mov cl,[es:FontHeader.Total]
xor ch,ch
CopyWidths:
mov al,[es:si]
mov [FontWidths+di],al
inc si
inc di
loop CopyWidths
ret
endp LoadFont
;-----------------------------------------------------------------------------
; DrawChar - Draw a Font Char.
; In:
; AL = Character Code.
; ES:DI = Frame Screen Address.
;-----------------------------------------------------------------------------
proc DrawChar
sub al,[FontFirst] ; Get Char BitMap Offset
xor ah,ah
mov bx,ax
mul [FontSize]
add ax,[FontDataOfs] ; si = char offset
mov si,ax
mov dl,[FontWidths+bx] ; dx = char width
xor dh,dh
mov cl,[FontHeight] ; cx = char height
xor ch,ch
mov al,[FontWidth] ; bp = font max width
xor ah,ah
mov bp,ax
mov ax,XDOTS ; Draw on Screen Center
sub ax,dx
shr ax,1
shl ax,1
add di,XDOTS*(16+YDOTS)
add di,ax
push ds ; ds = font data segment
mov ds,[FontDataSeg]
DrawCharLoop:
push cx
push si
push di
xor ah,ah
DrawPlane1:
mov al,[ds:si]
test al,al
je SkipColor
mov al,0FFh
mov [es:di],ax
SkipColor:
add si,bp
add di,XDOTS*2
loop DrawPlane1
pop di
pop si
pop cx
inc si
add di,2
dec dx
jg DrawCharLoop
pop ds
ret
endp DrawChar
;-----------------------------------------------------------------------------
; DrawMesg - Draws the Next Message on the Screen.
;-----------------------------------------------------------------------------
proc DrawMesg
pusha
push es
mov ax,ds ; Loads Frame Area Address
mov es,ax
lea di,[Frame]
cld
mov si,[MesgOff]
lodsb
test al,al
stc
je DrawMesgExit
mov [MesgOff],si
call DrawChar
clc
DrawMesgExit:
pop es
popa
ret
endp DrawMesg
;-----------------------------------------------------------------------------
; Random - Returns a random number of 16 bits.
;-----------------------------------------------------------------------------
proc Random
mov ax,[Seed]
imul ax,8905h
inc ax
mov [Seed],ax
ret
endp Random
;-----------------------------------------------------------------------------
; Flames - Flames Like Screen Animation.
;-----------------------------------------------------------------------------
proc Flames
pusha
push ds
push es
call SetModeX ; Sets VGA 80x80x256 graphics mode
call LoadFont
mov [MesgOff],offset TheMessage
call WaitVR
lea si,[Palette] ; Sets Color Palette
mov cx,768
mov dx,3C8h
xor al,al
out dx,al
inc dx
cld
rep outsb
mov ax,ds ; Clears Frame Buffer
mov es,ax
lea di,[Frame]
mov cx,XDOTS*(YDOTS+HIDDEN)
xor ax,ax
rep stosw
mov ax,0A000h ; Set Display Memory Segment
mov es,ax
mov bx,FLSEED ; Loads Flames Seed Factor
xor bp,bp ; Start Timer Counter
FlamesLoop:
inc bp ; Increase Timer
call WaitVR ; Wait Vertical Retrace
lea si,[Frame] ; Write Frame to the Screen
xor di,di
mov cx,XDOTS*YDOTS/2
WriteFrameLoop:
lodsw
mov dl,al
lodsw
mov dh,al
mov ax,dx
stosw
loop WriteFrameLoop
cmp bp,TIMEOUT ; Don't Draw Message while
jae DontDrawMesg ; Fading out the Flames.
mov ax,bp
xor dx,dx
mov cx,MESGSPEED
div cx
test dx,dx ; Draws Messages...
jne DontDrawMesg
call DrawMesg
jnc DontDrawMesg ; If no more message text,
mov bp,TIMEOUT ; Start fading out...
DontDrawMesg:
mov cx,XDOTS*(YDOTS+HIDDEN-2) ; Transform Upper Frame Lines
lea si,[Frame+2*XDOTS]
FlamesTransform:
mov ax,[ds:si-2] ; Sets Pixel at (X,Y) like
add ax,[ds:si+0] ; the average of the near four
add ax,[ds:si+2] ; pixels below it:
add ax,[ds:si+2*XDOTS] ; P(X,Y) = (P(X-1,Y+1)+P(X,Y+1)+
sub ax,bx ; P(X+1,Y+1)+P(X,Y+2)-Seed)/4
sar ax,2
jge FlameNotTooLow
xor ax,ax
FlameNotTooLow:
mov [ds:si-2*XDOTS],ax
add si,2
loop FlamesTransform
; Sets New Random Bottom Flames with Colors from 0 to 127.
lea si,[Frame+2*XDOTS*(YDOTS+HIDDEN-2)]
mov cx,XDOTS
xor dx,dx
RandomFlames:
call Random ; Use Random to Create a New
test ax,ax ; Flames Bottom Lines
js NotNewColor
call Random
mov dl,al
and dl,7Fh
NotNewColor:
mov [ds:si],dx
mov [ds:si+2*XDOTS],dx
add si,2
loop RandomFlames
mov ah,1 ; or Any Key Pressed?
int 16h
je CheckTimer
mov ah,0
int 16h
mov bp,TIMEOUT
CheckTimer:
cmp bp,TIMEOUT ; Timeout?
jb FlamesLoop
DecreaseFlames:
inc bx ; Increase Flames Seed
cmp bx,FLBLANK ; (makes flames more low)
jbe FlamesLoop
FlamesExit:
mov ax,0003h ; Set Text Mode 80x25x16
int 10h
pop es
pop ds
popa
ret
endp Flames
;-----------------------------------------------------------------------------
; Start - Startup code called from DOS.
;-----------------------------------------------------------------------------
proc Start
mov ax,@Data ; Set DS Segment
mov ds,ax
mov bx,ss ; Shrink Program Segment
mov ax,es
sub bx,ax
mov ax,sp
shr ax,4
inc ax
add bx,ax
mov ah,4Ah
call Flames ; Do Flames Demo
mov ax,4C00h
int 21h ; Exit to DOS.
endp Start
end Start
;=============================================================================
; scrl.asm - Simple Horizontal Scroller.
; File created: 11/21/93
; Copyright (c) 1993, Carlos Hasan Last modified: 11/21/93
;
; Description:
; Just a simple scroller in VGA ModeX and an external proportional
; font file in VLA chars format. Mainly based on VLA scrollers.
;
; Dependency:
; Requires Turbo Assembler 3.2 or later to be assembled.
; Dependant on the IBM PC 286 or better processor.
;=============================================================================
ideal
model small,pascal
jumps
p286
dosseg
stack 1024
ends
IFDEF LinkFont
global FontFAR:byte ; SCRL.FNT linked file.
ENDIF
;=========================== VLA Font Header =================================
struc FontHeader
Magic db "VGACH" ; Font Signature
First db ? ; First Char
Width db ? ; Font Width
Height db ? ; Font Height
Total db ? ; Number of Chars
ends FontHeader
;=========================== Data Segment ====================================
dataseg
SCREENWIDTH equ (2*320+8) ; Logical Screen Width
; Enough Space for Double-Window
; and the working hidden area
SCROLLROW equ 180 ; Scroller Window Start Row.
WinOffs dw ? ; Window Offset
CharOffs dw ? ; Char BitMap Offset
MesgOffs dw ? ; Ascii-Message Offset
FontHead FontHeader ? ; Font Header
CharColumn db ? ; Cur Char Column
FontFirst db ? ; Font First Char
FontWidth db ? ; Font Max Width
FontHeight db ? ; Font Height
FontDataOfs dw ? ; Font Data Offset
FontDataSeg dw ? ; Font Data Segment
FontWidths db 256 dup(?) ; Font Width Table
FontSize dw ? ; Font Char Size (Width*Height)
IFNDEF LinkFont
FontFileName db "SCRL.FNT",0 ; Font File Name
ENDIF
TheMessage db " ... Hello out there ... "
db " "
db " ... I am PELUSA from Chile ... "
db " "
db " ... Just a simple scroller... "
db " "
db " ... only useful to say that it's the FAKE demo ... "
db " "
db " ... you probably could have guessed that ... "
db " "
db " ... I hate scrollers because i have nothing to say..."
db " "
db " ... now enjoy the rest of this LAME thing ... "
db " ",0
codeseg
;-----------------------------------------------------------------------------
; SetModeX - Sets the VGA in Tweaked ModeX 320x400x256.
;-----------------------------------------------------------------------------
proc SetModeX
mov ax,0013h ; Sets VGA linear 320x200x256
int 10h
mov dx,3C4h ; Disable Chain-Four
mov ax,0604h
out dx,ax
mov dx,3C4h ; Enable Write to All Four Planes
mov ax,0F02h
out dx,ax
mov ax,0A000h ; Clear Display Memory
mov es,ax
xor di,di
xor ax,ax
mov cx,8000h
cld
rep stosw
mov dx,3D4h ; Reprogram CRT Controller:
mov ax,00014h ; turn off dword mode
out dx,ax
mov ax,0e317h ; turn on byte mode
out dx,ax
mov ax,00009h ; cell height
out dx,ax
mov dx,3D4h ; Sets Logical Screen Width
mov al,13h
mov ah,SCREENWIDTH/8
out dx,ax
ret
endp SetModeX
;-----------------------------------------------------------------------------
; WaitVR - Waits the Next VGA Vertical Retrace Ending.
;-----------------------------------------------------------------------------
proc WaitVR
mov dx,3DAh
WaitStartVR:
in al,dx
test al,8
je WaitStartVR
WaitEndVR:
in al,dx
test al,8
jne WaitEndVR
ret
endp WaitVR
;-----------------------------------------------------------------------------
; InitScroll - Initializes the Scroller Variables.
; Out:
; CF=1 if function was not successful.
; CF=0 if function was successful.
;-----------------------------------------------------------------------------
proc InitScroll
mov [WinOffs],0 ; Start Window Column
mov [CharColumn],0 ; Start with a ZeroWidth Char
mov [CharOffs],0 ; ZeroWidth Char BitMap Address
lea ax,[TheMessage] ; Sets Message Address
mov [MesgOffs],ax
call LoadFont ; Load Font Data
ret
endp InitScroll
;-----------------------------------------------------------------------------
; DoneScroll - Done Scroller Variables.
;-----------------------------------------------------------------------------
proc DoneScroll
IFNDEF LinkFont
mov es,[FontDataSeg] ; Free Font Data Segment
mov ah,49h
int 21h
ENDIF
ret
endp DoneScroll
;-----------------------------------------------------------------------------
; LoadFont - Loads a New VGA Font.
; Out:
; CF=1 if function was not successful.
; CF=0 if function was successful.
;-----------------------------------------------------------------------------
proc LoadFont
IFDEF LinkFont
mov ax,SEG FontFAR ; Load Font File Address
mov es,ax
mov [FontDataSeg],ax
mov [FontDataOfs],Size FontHeader
mov al,[es:FontHeader.First] ; Get Font First Char
mov [FontFirst],al
mov al,[es:FontHeader.Width] ; Get Font Data Size
mov ah,[es:FontHeader.Height]
mov [FontWidth],al
mov [FontHeight],ah
mul ah
mov [FontSize],ax
mov dl,[es:FontHeader.Total]
xor dh,dh
mul dx
add ax,Size FontHeader ; Copy Font Widths.
mov si,ax
xor di,di
mov cl,[es:FontHeader.Total]
xor ch,ch
CopyWidths:
mov al,[es:si]
mov [FontWidths+di],al
inc si
inc di
loop CopyWidths
ELSE
mov [FontDataSeg],0
mov ax,3D00h ; Open Font File
lea dx,[FontFileName]
int 21h
jc LoadFontExit
mov bx,ax
mov ah,3Fh ; Read Font Header
lea dx,[FontHead]
mov cx,Size FontHeader
int 21h
jc LoadFontExit
mov al,[FontHead.First] ; Get Font First Char
mov [FontFirst],al
mov al,[FontHead.Width] ; Get Font Data Size
mov ah,[FontHead.Height]
mov [FontWidth],al
mov [FontHeight],ah
mul ah
mov [FontSize],ax
mov dl,[FontHead.Total]
xor dh,dh
mul dx
push ax
push bx ; Alloc Space for Font Data
mov bx,ax
shr bx,4
inc bx
mov ah,48h
int 21h
pop bx
pop cx
jc LoadFontExit
push ds ; Read Font Data
mov [FontDataSeg],ax
mov [FontDataOfs],0
mov ds,ax
xor dx,dx
mov ah,3Fh
int 21h
pop ds
jc LoadFontExit
lea dx,[FontWidths] ; Read Font Widths
mov cl,[FontHead.Total]
xor ch,ch
mov ah,3Fh
int 21h
jc LoadFontExit
mov ah,3Eh ; Close Font File
int 21h
ENDIF
LoadFontExit:
ret
endp LoadFont
;-----------------------------------------------------------------------------
; DrawScroll - Polls the Horizontal Scroller.
; Out:
; CF=1 If no more scroll message.
; CF=0 If more scroll message.
;-----------------------------------------------------------------------------
proc DrawScroll
mov bx,[WinOffs] ; Loads Window Offset
add bx,2
mov dx,3D4h ; Sets VGA Start Address
mov al,0Dh
mov ah,bl
out dx,ax
dec al
mov ah,bh
out dx,ax
sub [CharColumn],4 ; Advance 4 pixels
jg NoNewChar ; Need a New Char?
call GetsNewChar ; Yes, Draw a New Char
jc DrawScrollExit
NoNewChar:
mov ax,0A000h ; Loads Display Memory Segment
mov es,ax
mov bl,[FontWidth] ; Loads Font Width and Height
mov cl,[FontHeight]
xor bh,bh
xor ch,ch
mov bp,SCREENWIDTH/4 ; Loads Logical Screen Width
mov dx,3C4h ; Enable Write to Plane 1
mov ax,0102h
out dx,ax
mov si,[CharOffs] ; Loads Char BitMap Address
mov di,[WinOffs] ; Loads VGA Window Dest Address
add di,SCROLLROW*SCREENWIDTH/4
push cx
push ds
mov ds,[FontDataSeg]
DrawCharColumn1:
mov al,[ds:si]
mov [es:di],al
mov [es:di+SCREENWIDTH/8],al
add si,bx
add di,bp
loop DrawCharColumn1
pop ds
pop cx
mov dx,3C4h ; Enable Write to Plane 2
mov ax,0202h
out dx,ax
mov si,[CharOffs] ; Loads Char BitMap Address
mov di,[WinOffs] ; Loads VGA Window Dest Address
inc si
add di,SCROLLROW*SCREENWIDTH/4
push cx
push ds
mov ds,[FontDataSeg]
DrawCharColumn2:
mov al,[ds:si]
mov [es:di],al
mov [es:di+SCREENWIDTH/8],al
add si,bx
add di,bp
loop DrawCharColumn2
pop ds
pop cx
mov dx,3C4h ; Enable Write to Plane 3
mov ax,0402h
out dx,ax
mov si,[CharOffs] ; Loads Char BitMap Address
mov di,[WinOffs] ; Loads VGA Window Dest Address
add si,2
add di,SCROLLROW*SCREENWIDTH/4
push cx
push ds
mov ds,[FontDataSeg]
DrawCharColumn3:
mov al,[ds:si]
mov [es:di],al
mov [es:di+SCREENWIDTH/8],al
add si,bx
add di,bp
loop DrawCharColumn3
pop ds
pop cx
mov dx,3C4h ; Enable Write to Plane 4
mov ax,0802h
out dx,ax
mov si,[CharOffs] ; Loads Char BitMap Address
mov di,[WinOffs] ; Loads VGA Window Dest Address
add si,3
add di,SCROLLROW*SCREENWIDTH/4
push cx
push ds
mov ds,[FontDataSeg]
DrawCharColumn4:
mov al,[ds:si]
mov [es:di],al
mov [es:di+SCREENWIDTH/8],al
add si,bx
add di,bp
loop DrawCharColumn4
pop ds
pop cx
inc [WinOffs] ; Advance Window by 4 pixels
cmp [WinOffs],SCREENWIDTH/8
jb DontWrapWindow
mov [WinOffs],0
DontWrapWindow:
add [CharOffs],4 ; Advance Char Column by 4
clc
DrawScrollExit:
ret
endp DrawScroll
;-----------------------------------------------------------------------------
; GetsNewChar - Gets the next message Character.
; Out:
; CF=1 If no more characters
; CF=0 If more characters
;-----------------------------------------------------------------------------
proc GetsNewChar
mov si,[MesgOffs] ; Loads the Message Offset
GetCharLoop:
lodsb ; Gets the Character
test al,al ; if End of Message ReStart
jne DrawCharNow
stc
jmp GetsNewCharExit
DrawCharNow:
mov [MesgOffs],si ; Save Message Offset
sub al,[FontFirst] ; Compute the Char BitMap Address
xor ah,ah
mov bx,ax
mov dx,[FontSize]
mul dx
add ax,[FontDataOfs]
mov [CharOffs],ax
mov al,[FontWidths+bx] ; Set the Char Width
mov [CharColumn],al
clc
GetsNewCharExit:
ret
endp GetsNewChar
;-----------------------------------------------------------------------------
; Start - Start the Demostration. Called from DOS.
;-----------------------------------------------------------------------------
proc Start
mov ax,@Data ; Sets Data Segment.
mov ds,ax
mov bx,sp ; Shrink Program Memory Block.
shr bx,4
inc bx
mov ax,ss
mov dx,es
sub ax,dx
add bx,ax
mov ah,4Ah
int 21h
call SetModeX ; Sets VGA ModeX.
call InitScroll ; Init Scroller.
jc DemoExit
cld
DemoLoop:
call WaitVR ; Waits Vertical Retrace.
call DrawScroll ; Draw the Scroller.
jc DemoBreak
mov ah,1 ; Any Key Pressed?
int 16h ; No, Loop.
je DemoLoop
DemoBreak:
call DoneScroll ; Done Scroller.
DemoExit:
mov ax,0003h ; Set Text Mode.
int 10h
mov ax,4C00h ; Exit to DOS.
int 21h
endp Start
end Start
;=============================================================================
; cplasma - Real Color plasma clouds demo.
; File created: 9-28-93
; Last modified: 9-28-93
; Description:
; This file implements the real color plasma demostration using the
; plasma routines and palette rotation using the VGA 320x200x256 mode.
;
; Portability:
; Requires Turbo Assembler 3.2 or better to be assembler.
; Dependent on the IBM PC 286 and the VGA graphics card.
;=============================================================================
.model small,pascal
jumps
.286
global DrawPlasma:proc ; in PLASMA.ASM file.
global ColorPlasma:proc
;===================== Demo equates and data =================================
TIMEOUT equ 70 * 6 ; 6 seconds timeout.
.data
Palette db 768 dup (?) ; hold the palette.
FadePalette db 768 dup (?) ; hold the faded palette.
Fade db ? ; fade level.
EscKey db ? ; true if ESC pressed.
Timer dw ? ; timer counter.
;========================== Demo routines ====================================
.code
;-----------------------------------------------------------------------------
; WaitVRT - Waits the Vertical Retrace Period.
;-----------------------------------------------------------------------------
WaitVRT proc near
push ax
push dx
mov dx,3DAh
WaitVRT1: in al,dx
test al,8
jz WaitVRT1
WaitVRT2: in al,dx
test al,8
jnz WaitVRT2
pop dx
pop ax
ret
WaitVRT endp
;-----------------------------------------------------------------------------
; SetPalette - set the 256 entries of the VGA color palette.
; In:
; DS:SI - Palette structure address.
;-----------------------------------------------------------------------------
SetPalette proc near
mov cx,768
mov dx,3C8h
xor al,al
out dx,al
mov dx,3DAh
WaitVR1: in al,dx
test al,8
jz WaitVR1
mov dx,3C9h
rep outsb
WaitVR2: in al,dx
test al,8
jnz WaitVR2
ret
SetPalette endp
;-----------------------------------------------------------------------------
; ColorPlasma - Performs the demonstration.
; In:
; DS - Data segment.
;-----------------------------------------------------------------------------
ColorPlasma proc
mov ax,0013h ; set 320x200x256 mode.
int 10h
mov [Fade],0 ; setup variables.
mov [EscKey],0
mov [Timer],0
lea di,[FadePalette] ; clear fade palette.
mov ax,ds
mov es,ax
mov cx,768
xor ax,ax
cld
rep stosb
lea si,[FadePalette]
call SetPalette ; set black palette.
GenPalette: lea di,[Palette] ; generation of the
xor cx,cx ; plasma palette.
GP0: mov al,63
mov ah,cl
mov bl,al
sub bl,cl
mov [di+0],al
mov [di+1],ah
mov [di+2],bl
add di,3
inc cx
cmp cx,64
jb Gp0
xor cx,cx
Gp1: mov al,63
sub al,cl
mov ah,63
mov bl,cl
mov [di+0],al
mov [di+1],ah
mov [di+2],bl
add di,3
inc cx
cmp cx,64
jb Gp1
xor cx,cx
Gp2: mov al,0
mov ah,63
sub ah,cl
mov bl,63
mov [di+0],al
mov [di+1],ah
mov [di+2],bl
add di,3
inc cx
cmp cx,64
jb Gp2
xor cx,cx
Gp3: mov al,cl
mov ah,0
mov bl,63
mov [di+0],al
mov [di+1],ah
mov [di+2],bl
add di,3
inc cx
cmp cx,64
jb Gp3
; draw plasma onto VGA screen.
call DrawPlasma,30,36,290,164,01234h,0A000h
mov ax,ds
mov es,ax
cld
PlasmaLoop: test [Timer],1 ; decreases the rot speed.
jne DontRotate
lea bx,[Palette] ; rotate the palette.
mov si,bx
mov di,bx
add si,9
mov cx,768-9
rep movsb
mov si,bx
mov cx,9
rep movsb
mov di,bx
xor al,al
mov cx,9
rep stosb
DontRotate:
cmp [EscKey],0 ; change the fade level.
jne FadeOut
FadeIn: mov bl,[Fade]
cmp bl,128
jae FadeInOut
inc [Fade]
jmp FadeInOut
FadeOut: mov bl,[Fade]
cmp bl,0
jbe FadeInOut
dec [Fade]
FadeInOut: lea si,[Palette] ; set fade palette using
lea di,[FadePalette] ; the current fade level
mov cx,768 ; and plasma palette.
FadeLoop: lodsb
mul bl
shr ax,7
stosb
loop FadeLoop
lea si,[FadePalette] ; set VGA fade-palette.
call SetPalette
mov ah,1 ; if any key pressed,
int 16h
jz CheckTimer
mov ah,0
int 16h
jmp BeginFadeOut
CheckTimer: inc [Timer] ; or timeout...
cmp [Timer],TIMEOUT
jb CheckExit
BeginFadeOut: inc [EscKey] ; start fade-out and exit.
CheckExit: cmp [Fade],0 ; if fade-out is done
jne PlasmaLoop ; then quit.
mov ax,0003h ; restore 80x25x16 text mode.
int 10h
ret
ColorPlasma endp
end
;=============================================================================
; plasma.asm - Plasma Clouds fractal calculation routine.
; File created: 9-26-93
; Copyright (c) 1993, Carlos Hasan Last modified: 9-26-93
;
; Description:
; This file implements the plasma clouds routine using a recursive algorithm
; optimized for use with VGA 320x200x256 graphics mode. There must be enough
; stack space for this routine.
;
; Portability:
; Requires Turbo Assembler 3.2 or better to be assembler.
; Dependent on the IBM PC 286 or later microprocessor.
;=============================================================================
.model small,pascal
.286
global DrawPlasma:proc
;===================== Plasma equates ========================================
MAXWIDTH equ 320 ; virtual screen dimensions.
MAXHEIGHT equ 200
MAXCOLOR equ 255 ; max colors for plasma.
SHIFTVALUE equ 2 ; granularity shift.
;====================== Plasma data ==========================================
.data
RandSeed dw ? ; random generator seed.
;====================== Plasma routines ======================================
.code
;-----------------------------------------------------------------------------
; Random - Returns a random number of 16 bits, modified version of the
; ripped System unit random routine of the Borland Pascal 7.0.
; Out:
; AX - random value.
; Modified:
; AX, DX, Flags.
;-----------------------------------------------------------------------------
Random proc near
mov ax,[RandSeed]
mov dx,8405h
mul dx
inc ax
mov [RandSeed],ax
ret
Random endp
;-----------------------------------------------------------------------------
; GetPixel - get the pixel color at specified location.
; In:
; ES - virtual screen segment.
; (X,Y) - pixel location.
; Out:
; AL - pixel color value.
; Modified:
; BX, Flags.
;-----------------------------------------------------------------------------
GetPixel macro X,Y
mov bx,Y
imul bx,MAXWIDTH
add bx,X
mov al,es:[bx]
endm
;-----------------------------------------------------------------------------
; PutPixel - put the pixel color at specified location.
; In:
; ES - virtual screen segment.
; (X,Y) - pixel location.
; AL - pixel value.
; Modified:
; BX, Flags.
;-----------------------------------------------------------------------------
PutPixel macro X,Y
mov bx,Y
imul bx,MAXWIDTH
add bx,X
mov es:[bx],al
endm
;----------------------------------------------------------------------------
; Adjust - adjust a new pixel value using two neighboring pixels.
; In:
; (XA,YA) - first near pixel.
; (XB,YB) - second near pixel.
; (X,Y) - new pixel.
; Out:
; AX - new pixel color value.
; Modified:
; AX, BX, DX, SI, DI, Flags.
;----------------------------------------------------------------------------
Adjust proc near XA:word,YA:word,X:word,Y:word,XB:word,YB:word
mov si,[X] ; if already painted
mov di,[Y] ; the pixel, use this
xor ax,ax ; one instead of new
GetPixel si,di ; calculation.
test ax,ax
jne AdjExit
call Random ; get a random variation
mov bx,[XB] ; dependent of the pixels
sub bx,[XA] ; distance and granularity
add bx,[YB] ; shift factor.
sub bx,[YA]
shl bx,SHIFTVALUE
imul bx
xor ax,ax ; adds the average of the
GetPixel [XA],[YA] ; near pixels colors.
add dx,ax
GetPixel [XB],[YB]
add ax,dx
shr ax,1
cmp ax,1 ; check if new color is
jge ColorUp ; in the right range.
mov ax,1
ColorUp: cmp ax,MAXCOLOR
jle ColorDn
mov ax,MAXCOLOR
ColorDn: PutPixel si,di ; paint pixel color.
AdjExit: ret
Adjust endp
;-----------------------------------------------------------------------------
; SubDivide - main plasma routine that divides a region recursively.
; In:
; (X1,Y1,X2,Y2) - screen plasma region.
; Modified:
; AX, BX, CX, DX, Flags.
;-----------------------------------------------------------------------------
SubDivide proc near X1:word,Y1:word,X2:word,Y2:word
local X:word,Y:word
mov ax,[X2] ; test if this region
sub ax,[X1] ; needs a sub-division.
cmp ax,2
jge SubDivCont
mov ax,[Y2]
sub ax,[Y1]
cmp ax,2
jge SubDivCont
jmp SubDivExit
SubDivCont: mov ax,[X1] ; get the center position
add ax,[X2] ; of the region.
rcr ax,1
mov [X],ax
mov ax,[Y1]
add ax,[Y2]
rcr ax,1
mov [Y],ax
; get the sum of the neighboring four pixel colors.
xor cx,cx
call Adjust, [X1],[Y1], [X],[Y1], [X2],[Y1]
add cx,ax
call Adjust, [X2],[Y1], [X2],[Y], [X2],[Y2]
add cx,ax
call Adjust, [X1],[Y2], [X],[Y2], [X2],[Y2]
add cx,ax
call Adjust, [X1],[Y1], [X1],[Y], [X1],[Y2]
add cx,ax
mov si,[X] ; test if the center pixel
mov di,[Y] ; need to be calculated.
GetPixel si,di
test al,al
jne SubDivNow
mov ax,cx ; yes, use the average of
add ax,2 ; the neighboring pixels.
shr ax,2 ; (don't allow color 0)
PutPixel si,di
; sub-divides the new four regions.
SubDivNow: call SubDivide, [X1],[Y1], [X],[Y]
call SubDivide, [X],[Y1], [X2],[Y]
call SubDivide, [X],[Y], [X2],[Y2]
call SubDivide, [X1],[Y], [X],[Y2]
SubDivExit: ret
SubDivide endp
;-----------------------------------------------------------------------------
; DrawPlasma - Main routine to draw plasma into a virtual screen.
; In:
; (X1,Y1,X2,Y2) - Virtual screen Window location.
; Seed - Initial random seed for the plasma generator.
; ScreenSeg - Virtual screen segment.
;-----------------------------------------------------------------------------
DrawPlasma proc XStart:word,YStart:word,XStop:word,YStop:word, \
Seed:word,ScreenSeg:word
mov ax,[ScreenSeg] ; setup virtual screen
mov es,ax ; segment,
mov ax,[Seed] ; and random calculation
mov [RandSeed],ax ; seed.
call Random ; set window corner pixels.
or al,1
PutPixel [XStart],[YStart]
call Random
or al,1
PutPixel [XStop],[YStart]
call Random
or al,1
PutPixel [XStart],[YStop]
call Random
or al,1
PutPixel [XStop],[YStop]
call SubDivide, [XStart],[YStart], [XStop],[YStop]
ret
DrawPlasma endp
end;=============================================================================
; rplasma - Runtime real plasma clouds demo.
; File created: 9-28-93
; Copyright (C) 1993, Carlos Hasan Last modified: 9-28-93
;
; Description:
; This file implements a runtime real plasma using sinus overlapping
; waves at random speeds using the VGA 320x400x256 mode. Based on the
; Vangelis Plasma demo code.
;
; Portability:
; Requires Turbo Assembler 3.2 or better to be assembler.
; Dependent on the IBM PC 286 and the VGA graphics card.
;=============================================================================
.model small,pascal
.286
global SinusPlasma:proc
;======================= Demo equates and data ===============================
TIMEOUT equ 70 * 6 ; 6 secs for timeout.
.data
include sintable.inc ; sinus table.
Palette db 768 dup (?) ; plasma palette.
FadePalette db 768 dup (?) ; faded palette.
WavHPos1 db ? ; wave horizontal and
WavHPos2 db ? ; vertical positions
WavVPos1 db ? ; and increments.
WavVPos2 db ?
WavHAdd1 db ? ; WARNING: the four waves
WavHAdd2 db ? ; positions must be at
WavVAdd1 db ? ; consecutive addresses.
WavVAdd2 db ?
Fade db ? ; fade level.
Esckey db ? ; true if key pressed.
Timer dw ? ; timer counter.
;======================= Demo routines =======================================
.code
;-----------------------------------------------------------------------------
; SetPalette - set the 256 entries of the VGA color palette.
; In:
; DS:SI - Palette structure address.
;-----------------------------------------------------------------------------
SetPalette proc near
mov cx,768
mov dx,3C8h
xor al,al
out dx,al
mov dx,3DAh
WaitVRT: in al,dx
test al,8
jz WaitVRT
mov dx,3C9h
rep outsb
WaitVRTE: in al,dx
test al,8
jnz WaitVRTE
ret
SetPalette endp
;-----------------------------------------------------------------------------
; SinusPlasma - Performs the demonstration.
; In:
; DS - Data segment.
;-----------------------------------------------------------------------------
SinusPlasma proc
pusha
push ds
push es
mov ax,0013h ; set 320x200x256 mode.
int 10h
mov ax,ds ; set black palette.
mov es,ax
lea di,[FadePalette]
mov cx,768
xor ax,ax
cld
rep stosb
lea si,[FadePalette]
call SetPalette
mov dx,3C4h ; setup VGA tricky
mov ax,0604h ; 320x400x256 mode.
out dx,ax
mov ax,0F02h ; enable 4-planes.
out dx,ax
mov dx,3D4h ; disable dword mode
mov ax,0014h
out dx,ax
mov ax,0E317h ; enable byte mode
out dx,ax
mov ax,0009h ; dup each scan 1 times
out dx,ax
mov ax,0A000h
mov es,ax
xor di,di
mov cx,8000h ; clear video memory.
xor ax,ax
cld
rep stosw
mov [Fade],0 ; setup variables.
mov [EscKey],0
mov [Timer],0
mov [WavHPos1],0 ; setup wave parameters.
mov [WavHPos2],0
mov [WavVPos1],0
mov [WavVPos2],0
mov [WavHAdd1],2
mov [WavHAdd2],1
mov [WavVAdd1],3
mov [WavVAdd2],4
GenPalette: lea di,[Palette] ; generation of the
xor al,al ; plasma palette.
mov [di+0],al
mov [di+1],al
mov [di+2],al
add di,3
mov cx,1
GP0: mov al,63
mov ah,cl
mov bl,al
sub bl,cl
mov [di+0],al
mov [di+1],ah
mov [di+2],bl
add di,3
inc cx
cmp cx,64
jb Gp0
xor cx,cx
Gp1: mov al,63
sub al,cl
mov ah,63
mov bl,cl
mov [di+0],al
mov [di+1],ah
mov [di+2],bl
add di,3
inc cx
cmp cx,64
jb Gp1
xor cx,cx
Gp2: mov al,0
mov ah,63
sub ah,cl
mov bl,63
mov [di+0],al
mov [di+1],ah
mov [di+2],bl
add di,3
inc cx
cmp cx,64
jb Gp2
xor cx,cx
Gp3: mov al,cl
mov ah,0
mov bl,63
mov [di+0],al
mov [di+1],ah
mov [di+2],bl
add di,3
inc cx
cmp cx,64
jb Gp3
PlasmaLoop: cmp [EscKey],0 ; change fade level.
jne FadeOut
FadeIn: mov bl,[Fade]
cmp bl,64
jae SkipFade
inc [Fade]
jmp FadeInOut
FadeOut: mov bl,[Fade]
cmp bl,0
jbe FadeInOut
dec [Fade]
FadeInOut: lea si,[Palette] ; set faded palette.
lea di,[FadePalette]
mov cx,768
mov ax,ds
mov es,ax
cld
FadeLoop: lodsb
mul bl
shr ax,6
stosb
loop FadeLoop
SkipFade: lea si,[FadePalette]
call SetPalette
mov ax,0A000h
mov es,ax
lea si,[SinusTable]
mov di,80*100+10 ; top left corner.
mov ah,100 ; 100 lines.
mov cl,[WavVPos1]
mov ch,[WavVPos2]
VertLoop: push ax
mov ah,60 ; 60 columns.
mov dl,[WavHPos1]
mov dh,[WavHPos2]
HorizLoop: mov bx,bp ; get random value.
mov al,bl
xor bh,bh
mov bl,dl
add al,[bx+si]
mov bl,dh
add al,[bx+si]
mov bl,cl
add al,[bx+si]
mov bl,ch
add al,[bx+si]
or al,1
stosb
add dl,1
add dh,3
dec ah
jne HorizLoop
add di,80+20 ; skip scan line.
add cl,7
add ch,3
pop ax
dec ah
jne VertLoop ; next plasma line.
inc bp ; get random value.
mov bx,bp
xor bl,bh
xor bl,[di-1]
xor bl,cl
xor bl,dl
add bl,ch
add bl,dh
test bl,8 ; change waves speed.
jne SpeedDown
SpeedUp: and bx,3
cmp [WavHAdd1+bx],+7
jg ChangePos
inc [WavHAdd1+bx]
jmp ChangePos
SpeedDown: and bx,3
cmp [WavHAdd1+bx],-7
jl ChangePos
dec [WavHAdd1+bx]
ChangePos: mov al,[WavHAdd1] ; change waves positions.
add [WavHPos1],al
mov al,[WavHAdd2]
add [WavHPos2],al
mov al,[WavVAdd1]
add [WavVPos1],al
mov al,[WavVAdd2]
add [WavVPos2],al
mov ah,1 ; if any key pressed,
int 16h
jz CheckTimer
mov ah,0
int 16h
jmp BeginFadeOut
CheckTimer: inc [Timer] ; or timeout,
cmp [Timer],TIMEOUT
jb CheckExit
BeginFadeOut: inc [EscKey] ; then fade-out and exit.
CheckExit: cmp [Fade],0
je PlasmaExit
jmp PlasmaLoop
PlasmaExit: mov ax,0003h
int 10h
pop es
pop ds
popa
ret
SinusPlasma endp
end
;=============================================================================
; wplasma - Runtime Sinus Wave Plasma Demostration.
; File created: 10-21-93
; Copyright (C) 1993, Carlos Hasan Last modified: 10-21-93
;
; Description:
; This file implements a runtime real plasma using sinus overlapping
; waves at random speeds using the VGA 320x80x256 mode.
;
; Portability:
; Requires Turbo Assembler 3.2 or better to be assembler.
; Dependent on the IBM PC 286 and the VGA graphics card.
;=============================================================================
jumps
.model small,pascal
.286
global WavePlasma:proc
;======================= Demo equates and data ===============================
TIMEOUT equ 70 * 10 ; at least 10 secs.
MAXHW equ 32 ; max horiz wave amount.
MAXVW equ 64 ; max vert wave amount.
MAXH equ 60 ; horiz wave length.
MAXV equ 80+MAXHW ; vert wave length.
SEED equ 57FEh ; randomize.
.data
include sintab2.inc ; sinus table.
HWave1 db MAXH dup (?) ; horiz waves.
HWave2 db MAXH dup (?)
VWave1 db MAXV dup (?) ; vert waves.
VWave2 db MAXV dup (?)
HWavPos1 dw ? ; horiz waves pos.
HWavPos2 dw ?
VWavPos1 dw ? ; vert waves pos.
VWavPos2 dw ?
HWavInc1 dw ? ; horiz wave speed.
VWavInc1 dw ? ; vert wave speed.
Bitmap db 256*MAXH+MAXV dup (?) ; aux plasma buffer.
Palette db 768 dup (?) ; plasma palette.
FadePalette db 768 dup (?) ; faded palette.
Fade db ? ; fade level.
Esckey db ? ; true if key pressed.
Timer dw ? ; timer counter.
RandSeed dw ? ; Random seed.
;======================= Demo routines =======================================
.code
;-----------------------------------------------------------------------------
; Random - Returns a 16-bit random number.
; Out:
; AX - Random number.
;-----------------------------------------------------------------------------
Random proc near
mov ax,[RandSeed]
imul ax,13A7h
inc ax
mov [RandSeed],ax
ret
Random endp
;-----------------------------------------------------------------------------
; WaitVRT - Waits the Vertical Retrace.
;-----------------------------------------------------------------------------
WaitVRT proc near
mov dx,3DAh
WaitVR1: in al,dx
test al,8
jne WaitVR1
WaitVR2: in al,dx
test al,8
je WaitVR2
ret
WaitVRT endp
;-----------------------------------------------------------------------------
; SetPalette - set the CX entries of the VGA color palette.
; In:
; DS:SI - Palette structure address.
; CX - Number of colors components.
;-----------------------------------------------------------------------------
SetPalette proc near
call WaitVRT
mov dx,3C8h
xor al,al
out dx,al
inc dx
rep outsb
ret
SetPalette endp
;-----------------------------------------------------------------------------
; UpdHWaves - Updates the Horiz Waves.
;-----------------------------------------------------------------------------
UpdHWaves proc near
mov ax,ds
mov es,ax
cld
lea si,[HWave1+1]
lea di,[HWave1]
mov cx,MAXH-1
rep movsb
mov si,[HWavPos1]
mov al,[SinusTable+si]
sar al,1
stosb
add si,[HWavInc1]
cmp si,360
jb SetHInc
sub si,360
SetHInc: mov [HWavPos1],si
lea si,[SinusTable]
add si,[HWavPos2]
lea bx,[HWave1]
lea di,[HWave2]
mov cx,MAXH
UpdHLoop: lodsb
sar al,1
add al,[bx]
sar al,3
add al,16
stosb
add si,3
inc bx
loop UpdHLoop
add [HWavPos2],4
cmp [HWavPos2],360
jb UpdHExit
sub [HWavPos2],360
UpdHExit: ret
UpdHWaves endp
;-----------------------------------------------------------------------------
; UpdVWaves - Updates the Vert Waves.
;-----------------------------------------------------------------------------
UpdVWaves proc near
mov ax,ds
mov es,ax
cld
lea si,[VWave1+1]
lea di,[VWave1]
mov cx,MAXV-1
rep movsb
mov si,[VWavPos1]
mov al,[SinusTable+si]
sar al,1
stosb
add si,[VWavInc1]
cmp si,360
jb SetVInc
sub si,360
SetVInc: mov [VWavPos1],si
lea si,[SinusTable]
add si,[VWavPos2]
lea bx,[VWave1]
lea di,[VWave2]
mov cx,MAXV
UpdVLoop: lodsb
sar al,1
add al,[bx]
sar al,2
add al,32
stosb
add si,2
inc bx
loop UpdVLoop
inc [VWavPos2]
cmp [VWavPos2],360
jb UpdVExit
sub [VWavPos2],360
UpdVExit: ret
UpdVWaves endp
;-----------------------------------------------------------------------------
; UpdBmp - Updates the Plasma bitmap.
;-----------------------------------------------------------------------------
UpdBmp proc near
cld
mov cx,MAXV
lea si,[VWave2]
lea di,[BitMap]
UpBmLoop: lodsb
i=0
REPT MAXH
inc al
mov [di+i],al
i=i+256
ENDM
inc di
loop UpBmLoop
ret
UpdBmp endp
;-----------------------------------------------------------------------------
; PutBmp - Puts into the screen the Plasma bitmap.
;-----------------------------------------------------------------------------
PutBmp proc near
cld
mov ax,0A000h
mov es,ax
mov di,80*10
lea dx,[BitMap]
lea si,[HWave2]
mov bl,MAXH
xor ah,ah
PutLoop: lodsb
push si
mov si,ax
add si,dx
mov cx,40
rep movsw
pop si
inc dh
dec bl
jne PutLoop
ret
PutBmp endp
;-----------------------------------------------------------------------------
; WavePlasma - Performs the demonstration.
; In:
; DS - Data segment.
;-----------------------------------------------------------------------------
WavePlasma proc
pusha
push ds
push es
mov ax,0013h ; set 320x200x256 mode.
int 10h
mov dx,3C4h ; disable chain-four
mov al,04h
out dx,al
inc dx
in al,dx
and al,0F7h
out dx,al
mov dx,3C4h ; enable all planes
mov ax,0F02h
out dx,ax
mov ax,0A000h ; clear video memory
mov es,ax
xor di,di
xor ax,ax
mov cx,8000h
cld
rep stosw
mov dx,3D4h ; normal word addressing
mov al,14h
out dx,al
inc dx
in al,dx
and al,0BFh
out dx,al
dec dx ; address output byte mode
mov al,17h
out dx,al
inc dx
in al,dx
or al,40h
out dx,al
mov dx,3D4h ; set max scanline.
mov ax,0409h
out dx,ax
GenPalette: lea di,[Palette] ; generation of the
xor al,al ; plasma palette.
mov [di+0],al
mov [di+1],al
mov [di+2],al
add di,3
mov cx,MAXH+MAXVW
xor ah,ah
mov bl,2
GPLoop: mov dl,32
mov al,ah
shr al,1
sub dl,al
mov [di+0],dl
mov dl,16
mov al,ah
shr al,2
sub dl,al
mov [di+1],dl
mov dl,63
mov al,ah
shr al,2
sub dl,al
mov [di+2],dl
add ah,bl
cmp ah,64
jb GPCont
neg bl
add ah,bl
add ah,bl
GPCont: add di,3
loop GPLoop
mov [Fade],0 ; setup variables.
mov [EscKey],0
mov [Timer],0
mov [RandSeed],SEED
mov [HWavPos1],0 ; setup wave parameters.
mov [HWavPos2],0
mov [VWavPos1],0
mov [VWavPos2],0
mov [HWavInc1],1
mov [VWavInc1],7
mov cx,MAXV ; use enough steps
SetupWaves: push cx ; to update all the
call UpdHWaves ; waves entries.
call UpdVWaves
pop cx
loop SetupWaves
PlasmaLoop: cmp [EscKey],0 ; change fade level.
jne FadeOut
FadeIn: mov bl,[Fade]
cmp bl,64
jae SkipFade
inc [Fade]
jmp FadeInOut
FadeOut: mov bl,[Fade]
cmp bl,0
jbe FadeInOut
dec [Fade]
FadeInOut: lea si,[Palette] ; set faded palette.
lea di,[FadePalette]
mov cx,768
mov ax,ds
mov es,ax
cld
FadeLoop: lodsb
mul bl
shr ax,6
stosb
loop FadeLoop
DoFade: lea si,[FadePalette] ; ensures thats always
mov cx,3*(MAXH+MAXVW+1) ; waits the VR per frame.
call SetPalette
jmp DoPlasma
SkipFade: call WaitVRT
DoPlasma: call UpdHWaves ; updates horiz waves.
call UpdVWaves ; updates vert waves.
call UpdBmp ; updates bitmap.
call PutBmp ; draw plasma.
call Random ; change wave's speed.
and ax,7
add ax,3
mov [HWavInc1],ax
call Random
and ax,3
add ax,5
mov [VWavInc1],ax
mov ah,1 ; if any key pressed,
int 16h
jz CheckTimer
mov ah,0
int 16h
jmp BeginFadeOut
CheckTimer: inc [Timer] ; or timeout,
cmp [Timer],TIMEOUT
jb CheckExit
BeginFadeOut: inc [EscKey] ; then fade-out and exit.
CheckExit: cmp [Fade],0
je PlasmaExit
jmp PlasmaLoop
PlasmaExit: mov ax,0003h
int 10h
pop es
pop ds
popa
ret
WavePlasma endp
end
;=============================================================================
; lenz.asm - Lenz or Crystal Ball Demostration.
; File created: 10/18/93
; Copyright (c) 1993, Carlos Hasan Last modified: 11/16/93
;
; Description:
; This file implements a Lenz-like Crystall Ball effect using the
; VGA 320x200x256 graphics mode and a 320x200x256 picture.
;
; Portability:
; Requires Turbo Assembler 3.2 or better to be assembled.
; Dependent on the IBM PC 286 and the VGA graphics card.
;
; Modifications:
; 10/22/93 - Startup Code and Picture/Palette in .OBJ files.
; 11/01/93 - Fixed Vertical Strengh Amplification.
; 11/16/93 - Added EmBoss and Slide Effect.
;=============================================================================
jumps
.model small,pascal
.286
dosseg ; used to link like
.stack 1024 ; an standalone program.
global LenzDemo:proc
global LenzPal:byte ; in LENZPAL.OBJ file.
global LenzPic:byte ; in LENZRAW.OBJ file.
;========================= Demo equates ======================================
;
; Note: 1. Lenz strengh is computed like: Strengh = 256/Factor
; where Factor is the real amplification of the lenz.
;
; 2. I have used a picture with a gray scale palette at
; entries from 128 to 255. Emboss Bright, Depth, MinGray
; and MaxGray must be adjusted for others pictures.
;
RADIUS equ 52 ; Lenz Radius in pixels.
RADIUSI equ (15*RADIUS)/20 ; Internal Lenz Radius.
STRENGH equ 155 ; Lenz Amplify (fixed 8.8).
MAXWIDTH equ 320 ; VGA 320x200x256 dimensions.
MAXHEIGHT equ 200
SEED equ 286Ah ; Random seed for movement.
BRIGHT equ 150 ; Emboss Bright Factor.
DEPTH equ 12*256 ; Emboss Depth Factor (8.8).
MINGRAY equ 128 ; Emboss Min/Max Gray
MAXGRAY equ 255 ; Scale Range Values.
TIMEOUT equ 70 * 6 ; at least 6 secs.
;======================== Demo data ==========================================
.data
LenzTable dw 4*RADIUS*RADIUS dup(?) ; Holds the transformation.
LenzWidth dw 2*RADIUS dup(?) ; Scanline widths.
RandSeed dw ? ; Random Seed.
Timer dw ? ; Timer counter.
;======================== Demo Routines ======================================
.code
;-----------------------------------------------------------------------------
; Random - Returns a random number of 16 bits, modified version of the
; ripped System unit random routine of the Borland Pascal 7.0.
; Out:
; AX - random value.
; Modified:
; AX, DX, Flags.
;-----------------------------------------------------------------------------
Random proc near
mov ax,[RandSeed]
mov dx,8405h
mul dx
inc ax
mov [RandSeed],ax
ret
Random endp
;-----------------------------------------------------------------------------
; WaitVRT - Waits the next VGA Vertical Retrace Period.
;-----------------------------------------------------------------------------
WaitVRT proc near
mov dx,3DAh
WaitVR1: in al,dx
test al,8
jne WaitVR1
WaitVR2: in al,dx
test al,8
je WaitVR2
ret
WaitVRT endp
;-----------------------------------------------------------------------------
; Delay - Sleeps during any amount of time. Uses the VGA Vertical retrace.
; In:
; CX - Number of ticks to speed (ticks at 70Hz).
;-----------------------------------------------------------------------------
Delay proc near
DelayLoop: call WaitVRT
loop DelayLoop
ret
Delay endp
;-----------------------------------------------------------------------------
; SetPalette - Sets the VGA color palette.
; In:
; ES:SI - Palette segment address.
;-----------------------------------------------------------------------------
SetPalette proc near
push ds
mov ax,es
mov ds,ax
mov dx,3C8h
xor al,al
out dx,al
inc dx
mov cx,768
cld
rep outsb
pop ds
ret
SetPalette endp
;-----------------------------------------------------------------------------
; ShowSpray - Writes a picture on the scren using a Spray-like effect.
; In:
; DX - Picture source segment.
;-----------------------------------------------------------------------------
ShowSpray proc near
push ds
push es
mov ds,dx
xor si,si
mov ax,0A000h
mov es,ax
xor cx,cx
SprayLoop: push cx
xor bx,bx
SprayLine: push bx
mov ah,cs:[RandTable+bx]
mov bx,cx
mov al,cs:[RandTable+bx]
mov bx,ax
mov di,ax
mov al,ds:[si+bx]
mov es:[di],al
pop bx
inc cl
inc bl
jne SprayLine
pop cx
inc cl
jne SprayLoop
pop es
pop ds
ret
RandTable label byte
db 83, 8, 18, 177, 13, 241, 149, 157
db 75, 248, 254, 23, 16, 66, 207, 31
db 211, 183, 80, 242, 218, 27, 15, 128
db 94, 98, 4, 36, 139, 110, 85, 230
db 212, 26, 12, 249, 169, 233, 200, 150
db 95, 114, 130, 167, 202, 187, 76, 145
db 62, 117, 115, 190, 209, 42, 185, 224
db 129, 104, 108, 192, 174, 137, 44, 41
db 141, 53, 179, 81, 181, 57, 147, 210
db 50, 134, 156, 125, 133, 126, 106, 162
db 20, 59, 84, 0, 151, 143, 101, 215
db 68, 246, 189, 197, 99, 213, 112, 144
db 28, 235, 240, 90, 154, 56, 138, 165
db 19, 166, 159, 92, 127, 208, 105, 118
db 119, 153, 191, 184, 87, 70, 9, 164
db 60, 252, 96, 3, 171, 38, 136, 14
db 7, 160, 71, 146, 102, 229, 227, 43
db 221, 182, 217, 30, 131, 219, 61, 180
db 195, 245, 109, 203, 24, 49, 170, 247
db 46, 148, 122, 250, 173, 107, 255, 194
db 6, 37, 93, 22, 168, 97, 193, 5
db 51, 223, 116, 86, 1, 89, 121, 243
db 140, 220, 39, 222, 65, 55, 17, 54
db 175, 206, 214, 155, 142, 163, 25, 188
db 178, 11, 204, 135, 201, 238, 79, 132
db 198, 40, 21, 45, 237, 253, 152, 74
db 32, 111, 52, 47, 236, 2, 176, 239
db 234, 58, 100, 91, 172, 73, 82, 205
db 34, 88, 78, 231, 232, 225, 48, 251
db 67, 123, 244, 29, 216, 64, 196, 69
db 199, 33, 72, 35, 10, 63, 161, 228
db 113, 158, 120, 103, 124, 186, 226, 77
ShowSpray endp
;-----------------------------------------------------------------------------
; DoEmBoss - Do the EmBoss effect into a 320x200x256 picture.
; In:
; DX - Picture Source Segment.
;-----------------------------------------------------------------------------
DoEmboss proc
pusha
push ds
mov ds,dx ; DS:SI = source image.
xor si,si
xor cx,cx
EmBossLine: push cx ; Y= 0..198
xor bx,bx
EmBossLoop: push bx ; X= 0..318
add bx,cx
xor dh,dh
mov dl,[si+bx]
mov ax,dx
mov dl,[si+bx+MAXWIDTH+1]
sub ax,dx
mov dx,DEPTH ; EmBoss Depth Factor.
imul dx
mov al,ah
mov ah,dl
add ax,BRIGHT
cmp ax,MINGRAY ; Check Color Range.
jge EmbossHigh
mov ax,MINGRAY
EmbossHigh: cmp ax,MAXGRAY
jle EmbossLow
mov ax,MAXGRAY
EmbossLow: mov [si+bx],al
pop bx
inc bx
cmp bx,MAXWIDTH-2
jbe EmbossLoop
pop cx
add cx,MAXWIDTH
cmp cx,MAXWIDTH*(MAXHEIGHT-2)
jbe EmbossLine
pop ds
popa
ret
DoEmboss endp
;-----------------------------------------------------------------------------
; ShowSlide - Shows a 320x200x256 picture using a Slide Effect.
; In:
; DX - Piccy Source Segment.
;-----------------------------------------------------------------------------
ShowSlide proc
local Level:word:MAXWIDTH,Weight:word:MAXWIDTH,\
LevelPtr:word,WeightPtr:word
pusha
push ds
push es
mov ds,dx ; DS:SI = Source Picture.
xor si,si
mov ax,ss
mov es,ax
lea di,[Level] ; Clear Slide Row Levels.
mov cx,MAXWIDTH
cld
xor ax,ax
rep stosw
lea di,[Weight] ; Clear Slide Row Weights.
mov cx,MAXWIDTH
cld
xor ax,ax
rep stosw
mov ax,0A000h
mov es,ax
SlideLoop: call WaitVRT
lea bx,[Level] ; Loads Level Pointer.
mov [LevelPtr],bx
lea bx,[Weight] ; Loads Weight Pointer.
mov [WeightPtr],bx
xor cx,cx ; For Each Column:
xor dx,dx
SlideInner: mov bx,[LevelPtr] ; Level[Col] < 320*200? Skip.
mov ax,ss:[bx]
cmp ax,MAXWIDTH*MAXHEIGHT
jae SlideContinue
inc dx ; Sets Flag.
mov bx,[WeightPtr] ; Weight[Col] <> 0?
mov ax,ss:[bx] ; Yes, Decrease.
test ax,ax ; No, Slide Down Row.
jz SlideDown
dec ax
mov ss:[bx],ax
jmp SlideContinue
SlideDown: mov bx,[LevelPtr] ; Level[Col] += 320
mov ax,ss:[bx]
add ax,MAXWIDTH
mov ss:[bx],ax
add ax,cx ; DI = Col + Level[Col]
mov di,ax
mov bx,di ; Sets New Row Weight:
mov al,es:[di+MAXWIDTH] ; W=ABS(VMEM[DI+320]-VMEM[DI])
sub al,es:[di]
jge SlidePos
neg al
SlidePos: xor ah,ah
mov bx,[WeightPtr]
mov ss:[bx],ax
mov bx,di ; Put Pixel at (Col,Level[Col])
mov al,ds:[si+bx]
mov es:[di],al
SlideContinue: add [LevelPtr],2 ; Next Column.
add [WeightPtr],2
inc cx
cmp cx,MAXWIDTH
jb SlideInner
test dx,dx ; Screen 100% filled?
jnz SlideLoop ; No, Repeat.
pop es
pop ds
popa
ret
ShowSlide endp
;-----------------------------------------------------------------------------
; GenLenz - Renders the Transformation matrix used during animation.
;
; Note: The square root is calculated using the Newton iteration
; aproximation algorithm:
; y² + (r² - x²)
; y² ≡ r² - x² ══ y ≈ ────────────────
; 2y
;
; We performs only one iteration using a initial «y» value
; near to the real square root wanted.
;-----------------------------------------------------------------------------
GenLenz proc near
local X:word,Y:word,R:word,Dist:Word,AddX:word,AddY:word
mov ax,ds
mov es,ax
cld
xor ax,ax ; Fills the whole rectangle
lea di,[LenzTable] ; matrix with a linear
mov cx,2*RADIUS ; transformation.
MakLinLoop: push ax
push cx
mov cx,2*RADIUS
MakLinRow: stosw
inc ax
loop MakLinRow
pop cx
pop ax
add ax,MAXWIDTH
loop MakLinLoop
mov [X],RADIUS ; makes the scanlines
mov [Y],0 ; widths of the lenz
MakWidth: cmp [Y],RADIUS ; with radius RADIUS.
jge MakXWidth
mov ax,[X]
mov bx,RADIUS ; LenzWidth[Radius+Y] = X
add bx,[Y]
shl bx,1
mov [LenzWidth+bx],ax
mov bx,RADIUS ; LenzWidth[Radius-Y-1] = X
sub bx,[Y]
dec bx
shl bx,1
mov [LenzWidth+bx],ax
mov ax,[Y] ; X² = Radius² - Y²
imul ax
mov bx,ax
mov ax,[X]
imul ax
sub ax,bx
add ax,RADIUS*RADIUS
sar ax,1
cwd
mov bx,[X]
idiv bx
mov [X],ax
inc [Y] ; Y = Y+1
jmp MakWidth
MakXWidth:
mov [X],RADIUSI ; Makes the transformation
mov [Y],0 ; for the Lenz of radius
MakLoop: cmp [Y],RADIUSI ; RADIUSY. Notice that
jge MakExit ; this lets a border
; used for restoring the
; background while moving
; the lenz into the screen.
mov ax,[X] ; compute the scanline
mov dx,6 ; width adjusting with
imul dx ; an aspect ratio of 6/5.
mov bx,5
idiv bx
mov [R],ax
mov [Dist],0
mov [AddX],0
mov [AddY],ax
MakLine: mov ax,[R]
cmp [AddX],ax
jge MakLineBreak
; si = @LenzTable[0,RADIUS-Y-1]
lea si,[LenzTable]
mov ax,RADIUS
sub ax,[Y]
dec ax
imul ax,2*RADIUS
add si,ax
shl si,1
; di = @LenzTable[0,RADIUS+Y]
lea di,[LenzTable]
mov ax,RADIUS
add ax,[Y]
imul ax,2*RADIUS
add di,ax
shl di,1
; Lenz[RADIUS+AddX,RADIUS-Y-1] = RADIUS+Hi(Dist) +
; MAXWIDTH * (RADIUS-1-STRENGH*Y)
mov bx,RADIUS
add bx,[AddX]
shl bx,1
mov ax,[Y]
imul ax,STRENGH
sar ax,8
imul ax,MAXWIDTH
neg ax
add ax,RADIUS+MAXWIDTH*(RADIUS-1)
mov dx,[Dist]
shr dx,8
add ax,dx
mov [si+bx],ax
; Lenz[RADIUS-AddX-1,RADIUS-Y-1] = RADIUS-Hi(Dist)-1+
; MAXWIDTH * (RADIUS-1-STRENGH*Y)
mov bx,RADIUS
sub bx,[AddX]
dec bx
shl bx,1
mov ax,[Y]
imul ax,STRENGH
sar ax,8
imul ax,MAXWIDTH
neg ax
add ax,RADIUS+MAXWIDTH*(RADIUS-1)
mov dx,[Dist]
shr dx,8
sub ax,dx
dec ax
mov [si+bx],ax
; LenzTable[RADIUS+AddX,RADIUS+Y] = RADIUS+Hi(Dist)+
; MAXWIDTH * (RADIUS + STRENGH*Y)
mov bx,RADIUS
add bx,[AddX]
shl bx,1
mov ax,[Y]
imul ax,STRENGH
sar ax,8
imul ax,MAXWIDTH
add ax,RADIUS+MAXWIDTH*RADIUS
mov dx,[Dist]
shr dx,8
add ax,dx
mov [di+bx],ax
; LenzTable[RADIUS-AddX-1,RADIUS+Y] = RADIUS-Hi(Dist)-1+
; MAXWIDTH * (RADIUS+STRENGH*Y)
mov bx,RADIUS
sub bx,[AddX]
dec bx
shl bx,1
mov ax,[Y]
imul ax,STRENGH
sar ax,8
imul ax,MAXWIDTH
add ax,RADIUS+MAXWIDTH*RADIUS
mov dx,[Dist]
shr dx,8
sub ax,dx
dec ax
mov [di+bx],ax
; Dist = Dist + (Strengh*Radius)/dY
mov ax,STRENGH*RADIUS
cwd
mov bx,[AddY]
idiv bx
add [Dist],ax
mov ax,[AddY] ; dY² = R² - dX²
imul ax
mov bx,ax
mov ax,[AddX]
imul ax
sub bx,ax
mov ax,[R]
imul ax
add ax,bx
sar ax,1
cwd
mov bx,[AddY]
idiv bx
mov [AddY],ax
inc [AddX] ; dX = dX+1
jmp MakLine
MakLineBreak: mov ax,[X] ; X² = Radius'² - Y²
imul ax
mov bx,ax
mov ax,[Y]
imul ax
sub bx,ax
mov ax,RADIUSI*RADIUSI
add ax,bx
sar ax,1
cwd
mov bx,[X]
idiv bx
mov [X],ax
inc [Y] ; Y = Y+1
jmp MakLoop
MakExit: ret
GenLenz endp
;-----------------------------------------------------------------------------
; WriteLenz - Writes the Lenz using the transformation matrix.
; In:
; DI - Starting offset location of the lenz.
; DX - Virtual picture used like background.
;-----------------------------------------------------------------------------
WriteLenz proc near
push bp
mov ax,0A000h
mov es,ax
lea bx,[LenzTable]
lea si,[LenzWidth]
mov bp,di
mov cx,2*RADIUS
cld
WriteLoop: push bx
push cx
push si
push di
cmp di,MAXWIDTH*MAXHEIGHT
jae WriteBreak
mov cx,[si] ; gets the scanline width.
mov ax,RADIUS
sub ax,cx
add di,ax
add bx,ax
add bx,ax
WriteLine: push es
mov es,dx
mov si,[bx]
mov al,es:[bp+si]
mov si,[bx+2]
mov ah,es:[bp+si]
add bx,4
pop es
stosw
loop WriteLine
WriteBreak: pop di
pop si
pop cx
pop bx
add bx,4*RADIUS
add si,2
add di,MAXWIDTH
loop WriteLoop
pop bp
ret
WriteLenz endp
;-----------------------------------------------------------------------------
; LenzDemo - Performs the demostration.
; In:
; DS - Data Segment.
; PicSeg - VGA 320x200x256 Picture used for Background.
; PalSeg - Color Palette of the Picture.
;-----------------------------------------------------------------------------
LenzDemo proc PicSeg:word,PalSeg:dword
local X:word,Y:word,AddX:word,AddY:word
mov ax,13h ; sets 320x200x256 mode.
int 10h
call GenLenz ; creates the lenz matrix.
mov cx,35 ; waits 0.5 seconds.
call Delay
les si,[PalSeg] ; sets the palette.
call SetPalette
mov dx,[PicSeg] ; writes the picture
call ShowSpray ; to the screen.
mov [RandSeed],SEED ; Randomize.
mov [Timer],0
mov [X],RADIUS
mov [Y],RADIUS
mov [AddX],3
mov [AddY],2
DemoLoop: call WaitVRT ; Waits VR period.
mov ax,[Y] ; outputs the lenz
sub ax,RADIUS ; crystall ball at
mov dx,MAXWIDTH ; center coordinates (X,Y).
mul dx
add ax,[X]
sub ax,RADIUS
mov di,ax
mov dx,[PicSeg]
call WriteLenz
AdjustX: mov ax,[X] ; adjust the X coord.
add ax,[AddX]
cmp ax,RADIUS
jb ChangeX
cmp ax,MAXWIDTH-RADIUS
ja ChangeX
mov [X],ax
jmp AdjustY
ChangeX: call Random
shr ax,15
inc ax
cmp [AddX],0
jl SetAddX
neg ax
SetAddX: mov [AddX],ax
AdjustY: mov ax,[Y] ; adjust the Y coord.
add ax,[AddY]
cmp ax,RADIUSI
jb ChangeY
cmp ax,MAXHEIGHT-RADIUSI
ja ChangeY
mov [Y],ax
jmp Continue
ChangeY: call Random
and ax,1
inc ax
cmp [AddY],0
jl SetAddY
neg ax
SetAddY: mov [AddY],ax
Continue: inc [Timer] ; timeout?
cmp [Timer],TIMEOUT
jae DemoExit
mov ah,1 ; any key pressed?
int 16h
je DemoLoop
mov ah,0 ; flush keyboard.
int 16h
DemoExit: mov dx,[PicSeg] ; EmBoss the Piccy.
call DoEmboss
mov dx,[PicSeg] ; SlideDown the Piccy.
call ShowSlide
mov cx,70 ; Sleep a while..
call Delay
mov es,[PicSeg] ; Blanks the picture.
xor di,di
mov cx,MAXWIDTH*MAXHEIGHT
xor ax,ax
cld
rep stosb
mov dx,[PicSeg] ; Clears the Screen.
call ShowSpray
mov cx,35 ; waits 0.5 seconds.
call Delay
mov ax,03h ; restores 80x25x16 mode.
int 10h
ret
LenzDemo endp
;-----------------------------------------------------------------------------
; Start - Startup Code called from DOS.
; In:
; ES - Program Segment Prefix.
;-----------------------------------------------------------------------------
Start proc
mov ax,@Data
mov ds,ax
call LenzDemo,SEG LenzPic,SEG LenzPal,OFFSET LenzPal
mov ax,4C00h
int 21h
Start endp
end Start
;=============================================================================
; dblscrl.asm - Double Horizontal Scroller.
; File created: 11/21/93
; Copyright (c) 1993, Carlos Hasan Last modified: 11/21/93
;
; Description:
; Another Horizontal Scroller using a Logo Picture of 256x128x256.
;
; Dependency:
; Requires Turbo Assembler 3.2 or later to be assembled.
; Dependant on the IBM PC 286 or better processor.
;=============================================================================
ideal
model small,pascal
jumps
p286
dosseg
stack 1024
ends
global LogoRAW:byte ; LOGO.RAW linked file.
global LogoPAL:byte ; LOGO.PAL linked file.
;=========================== Data Segment ====================================
dataseg
SCREENWIDTH equ (2*320) ; Logical Screen Width
; Enough Space for Double-Window
LOGOWIDTH equ 256 ; Logo Piccy Dimensions.
LOGOHEIGHT equ 128
SCROLLSPEED equ 2 ; Scrollers Speed.
;=========================== Code Segment ====================================
codeseg
;-----------------------------------------------------------------------------
; SetModeX - Sets the VGA in Tweaked ModeX 320x400x256.
;-----------------------------------------------------------------------------
proc SetModeX
mov ax,0013h ; Sets VGA linear 320x200x256
int 10h
mov dx,3C4h ; Disable Chain-Four
mov ax,0604h
out dx,ax
mov dx,3C4h ; Enable Write to All Four Planes
mov ax,0F02h
out dx,ax
mov ax,0A000h ; Clear Display Memory
mov es,ax
xor di,di
xor ax,ax
mov cx,8000h
cld
rep stosw
mov dx,3D4h ; Reprogram CRT Controller:
mov ax,00014h ; turn off dword mode
out dx,ax
mov ax,0e317h ; turn on byte mode
out dx,ax
mov ax,00009h ; cell height
out dx,ax
mov dx,3D4h ; Sets Logical Screen Width
mov al,13h
mov ah,SCREENWIDTH/8
out dx,ax
ret
endp SetModeX
;-----------------------------------------------------------------------------
; SetStartAddr - Sets the VGA Start Address Register.
; In:
; BX = Start Address.
;-----------------------------------------------------------------------------
proc SetStartAddr
mov dx,3D4h ; Sets VGA Start Address
mov al,0Dh
mov ah,bl
out dx,ax
dec al
mov ah,bh
out dx,ax
ret
endp SetStartAddr
;-----------------------------------------------------------------------------
; WaitVR - Waits the Next VGA Vertical Retrace Ending.
;-----------------------------------------------------------------------------
proc WaitVR
mov dx,3DAh
WaitStartVR:
in al,dx
test al,8
je WaitStartVR
WaitEndVR:
in al,dx
test al,8
jne WaitEndVR
ret
endp WaitVR
;-----------------------------------------------------------------------------
; DrawLogo - Writes on Screen the Logo Picture.
;-----------------------------------------------------------------------------
proc DrawLogo
pusha
push ds
push es
call WaitVR
mov ax,SEG LogoPAL ; Sets the Logo Palette
mov ds,ax
mov si,OFFSET LogoPAL
mov cx,768
mov dx,3C8h
xor al,al
out dx,al
inc dx
rep outsb
mov ax,SEG LogoRAW ; Load LogoRAW Address
mov ds,ax
mov si,OFFSET LogoRAW
mov ax,0A000h ; Load Display Memory Segment
mov es,ax
mov ax,1102h
DrawPlanes:
push ax
push si
mov dx,3C4h ; Select Write Plane
out dx,ax
mov di,(320+SCREENWIDTH*220)/4
mov bx,LOGOHEIGHT ; Write Pixels
DrawLoop:
mov cx,LOGOWIDTH/4
DrawRow:
mov al,[ds:si]
mov [es:di],al
add si,4
inc di
loop DrawRow
add di,(SCREENWIDTH-LOGOWIDTH)/4
dec bx
jne DrawLoop
pop si
pop ax
inc si
add ah,ah ; Next Plane.
jnc DrawPlanes
pop es
pop ds
popa
ret
endp DrawLogo
;-----------------------------------------------------------------------------
; Start - Start the Demostration. Called from DOS.
;-----------------------------------------------------------------------------
proc Start
mov ax,@Data ; Sets Data Segment.
mov ds,ax
mov bx,sp ; Shrink Program Memory Block.
shr bx,4
inc bx
mov ax,ss
mov dx,es
sub ax,dx
add bx,ax
mov ah,4Ah
int 21h
call SetModeX ; Sets VGA ModeX.
call DrawLogo ; Draw Logo.
mov cx,35 ; Sleep about 0.5 sec
SleepEntry:
call WaitVR
loop SleepEntry
mov si,0 ; Starting Scrollers
mov di,SCREENWIDTH*164/4 ; Address Offsets.
DemoLoop:
call WaitVR ; Waits Vertical Retrace.
mov bx,si ; Show Upper Scroller.
call SetStartAddr
call WaitVR ; Waits Vertical Retrace.
mov bx,di ; Show Bottom Scroller
call SetStartAddr
add si,SCROLLSPEED ; Move Scrollers to the Left&Right.
sub di,SCROLLSPEED
cmp si,SCREENWIDTH/4 ; Enough Frames?
jbe DemoLoop
DemoExit:
mov cx,35 ; Sleep about 0.5 sec
SleepExit:
call WaitVR
loop SleepExit
mov ax,0003h ; Set Text Mode.
int 10h
mov ax,4C00h ; Exit to DOS.
int 21h
endp Start
end Start
;=============================================================================
; land.asm - Landscape fractal demostration.
; File created: 9/30/93
; Copyright (c) 1993, Carlos Hasan Last modified: 10/22/93
;
; Description:
; This file implements a fractal 3D landscape rotation using the basic
; plasma routines and 3D rotations. This uses the VGA 320x200x256 mode.
;
; Portability:
; Requires Turbo Assembler 3.2 or better to be assembled.
; Dependent on the IBM PC 286 and the VGA graphics card.
;
; Modifications:
; 10/22/93 - Startup Code. Now is an Standalone Program.
;=============================================================================
.model small,pascal
.286
dosseg ; used to link like
.stack 1024 ; an standalone program.
global DrawPlasma:proc ; in PLASMA.ASM file.
global LandScape:proc
;===================== Demo equates and data =================================
TIMEOUT equ 70 * 10 ; about 10 sec for timeout.
FADESPEED equ 6 ; fade speed.
SCREENWIDTH equ 320 ; screen dimensions.
SCREENHEIGHT equ 200
TRIGSHIFT equ 6 ; sin/cos shift factor.
LANDSCAPEX equ 320 ; landscape grid dimensions.
LANDSCAPEY equ 200
WATERLEVEL equ 128 ; plasma water level.
PLASMASEED equ 8945h ; plasma random seed.
CENTERX equ 160 ; screen grid center
CENTERY equ 140 ; position.
GRIDX equ 32 ; screen grid dimensions
GRIDY equ 32 ; and gaps length.
GRIDDX equ 6
GRIDDY equ 6
.data
include sincos.inc ; sinus/cosinus table.
LandSeg dw ? ; landscape levels.
Pixels dw GRIDX * GRIDY dup (?) ; screen pixels locations.
Palette db 768 dup (?) ; hold the color palette.
FromPalette db 768 dup (?) ; fading-palettes.
ToPalette db 768 dup (?)
Timer dw ? ; timer counter.
;======================= Demo routines =======================================
.code
;-----------------------------------------------------------------------------
; WaitVRT - Waits the VGA vertical retrace period.
;-----------------------------------------------------------------------------
WaitVRT proc near
mov dx,3DAh
WaitVRT1: in al,dx ; wait the start of
test al,8 ; vertical retrace.
jz WaitVRT1
WaitVRT2: in al,dx ; wait the end of
test al,8 ; vertical retrace.
jnz WaitVRT2
ret
WaitVRT endp
;-----------------------------------------------------------------------------
; SetPalette - set the 256 entries of the VGA color palette.
; In:
; DS:SI - Palette structure address.
;-----------------------------------------------------------------------------
SetPalette proc near
mov cx,768
mov dx,3C8h
xor al,al
out dx,al
call WaitVRT
mov dx,3C9h
rep outsb
ret
SetPalette endp
;-----------------------------------------------------------------------------
; FadeTo - Fade palette effect.
; In:
; FromPalette - Source palette.
; ToPalette - Destination palette.
;-----------------------------------------------------------------------------
FadeTo proc near
FadeLoop: lea si,[FromPalette]
call SetPalette
mov cx,768
xor dx,dx
xor bx,bx
FadeColor: mov al,[FromPalette+bx]
mov ah,[ToPalette+bx]
cmp al,ah
je SkipFade
ja FadeOut
FadeIn: add al,FADESPEED
cmp al,ah
jl SetColor
mov al,ah
jmp SetColor
FadeOut: sub al,FADESPEED
cmp al,ah
jg SetColor
mov al,ah
jmp SetColor
SetColor: mov [FromPalette+bx],al
inc dx
SkipFade: inc bx
loop FadeColor
test dx,dx
jne FadeLoop
ret
FadeTo endp
;-----------------------------------------------------------------------------
; FlashIn - Flash fade-in effect.
; In:
; Palette - Source palette.
;-----------------------------------------------------------------------------
FlashIn proc near
mov ax,ds
mov es,ax
cld
lea di,[FromPalette] ; fade from black to white.
mov cx,768
mov al,00h
rep stosb
lea di,[ToPalette]
mov cx,768
mov al,3Fh
rep stosb
call FadeTo
lea di,[FromPalette] ; fade from white to
mov cx,768 ; destination palette.
mov al,3Fh
rep stosb
lea si,[Palette]
lea di,[ToPalette]
mov cx,768
rep movsb
call FadeTo
ret
FlashIn endp
;-----------------------------------------------------------------------------
; FlashOut - Flash fade-out effect.
; In:
; Palette - Source palette.
;-----------------------------------------------------------------------------
FlashOut proc near
mov ax,ds
mov es,ax
cld
lea di,[ToPalette] ; fade from source palette
mov cx,768 ; to white palette.
mov al,3Fh
rep stosb
lea si,[Palette]
lea di,[FromPalette]
mov cx,768
rep movsb
call FadeTo
lea di,[FromPalette] ; fade from white to black.
mov cx,768
mov al,3Fh
rep stosb
lea di,[ToPalette]
mov cx,768
mov al,00h
rep stosb
call FadeTo
ret
FlashOut endp
;-----------------------------------------------------------------------------
; GenLandscape - This routines generates the lanscape surface using the
; plasma routines basically and checks that all the mountain levels
; are in the right range.
; In:
; LandSeg - Segment addressing for the landscape.
;-----------------------------------------------------------------------------
GenLandscape proc near
mov ax,[LandSeg] ; clear landscape area.
mov es,ax
xor di,di
xor ax,ax
mov cx,LANDSCAPEX * LANDSCAPEY
cld
rep stosb
; draw initial plasma landscape.
call DrawPlasma,0,0,LANDSCAPEX-1,LANDSCAPEY-1, \
PLASMASEED,[LandSeg]
; adjust levels for the real landscape.
mov ax,[LandSeg]
mov es,ax
xor di,di
mov cx,LANDSCAPEX * LANDSCAPEY
cld
AdjLoop: mov al,es:[di]
sub al,WATERLEVEL
test al,al
jge AdjLevel
xor al,al
AdjLevel: xor ah,ah
imul ax,192
inc ah
mov es:[di],ah
inc di
loop AdjLoop
ret
GenLandscape endp
;-----------------------------------------------------------------------------
; DrawLandscape - Draws a region of the landscape on the screen starting
; at the specified position and rotation angles. The clipping support
; have been removed for speed.
; In:
; (PosX,PosY) - Landscape starting position.
; AngleY - Inclination angle.
; AngleZ - Spin angle.
;-----------------------------------------------------------------------------
DrawLandscape proc near PosX:word,PosY:word, AngleY:word,AngleZ:word
local SinY:word,SinZ:word,CosY:word,CosZ:word, \
YIAdd:word,YJAdd:word,ZIAdd:word,ZJAdd:word, \
Y0:word,Z0:word,Y:word,Z:word
mov bx,[AngleY] ; compute rotation
mov al,[SinTable+bx] ; parameters.
cbw
mov [SinY],ax
mov al,[CosTable+bx]
cbw
mov [CosY],ax
mov bx,[AngleZ]
mov al,[SinTable+bx]
cbw
mov [SinZ],ax
mov al,[CosTable+bx]
cbw
mov [CosZ],ax
mov ax,[SinZ] ; yiadd = griddx * sinz
imul ax,GRIDDX
mov [YIAdd],ax
mov ax,[CosZ] ; yjadd = griddy * cosz
imul ax,GRIDDY
mov [YJAdd],ax
mov ax,[CosZ] ; ziadd = griddx * cosz * siny
mov dx,[SinY]
imul dx
imul ax,GRIDDX
sar ax,TRIGSHIFT
mov [ZIAdd],ax
mov ax,[SinZ] ; zjadd = -griddy * sinz * siny
mov dx,[SinY]
imul dx
imul ax,-GRIDDY
sar ax,TRIGSHIFT
mov [ZJAdd],ax
mov ax,[YIAdd] ; compute starting grid
imul ax,-GRIDX/2 ; corner position.
mov dx,[YJAdd]
imul dx,-GRIDY/2
add ax,dx
mov [Y0],ax
mov ax,[ZIAdd]
imul ax,-GRIDX/2
mov dx,[ZJAdd]
imul dx,-GRIDY/2
add ax,dx
mov [Z0],ax
mov ax,[LandSeg] ; es = landscape segment.
mov es,ax
lea si,[Pixels] ; ds:si = pixels offsets.
mov di,[PosY] ; store offset
imul di,LANDSCAPEX ; just for speed.
add di,[PosX]
mov cx,GRIDX
ForI: push cx
mov ax,[Y0] ; y = y0
mov [Y],ax
mov ax,[Z0] ; z = z0
mov [Z],ax
mov cx,GRIDY
ForJ: push es
mov ax,0A000h ; clear old pixel.
mov es,ax
mov bx,[si]
mov byte ptr es:[bx],al
pop es
; here the code must be hooked to support clipping, use an "illegal"
; offset to store pixels that are not drawed, and then the routine above
; must erase only "legal" pixels.
mov bl,es:[di] ; bl = landscape(posx,posy)
mov al,bl ; ax = -centery + (z + bl*cosy)
xor ah,ah
imul [CosY]
add ax,[Z]
sar ax,TRIGSHIFT
sub ax,CENTERY
imul ax,SCREENWIDTH
mov dx,[Y] ; dx = centery + y
sar dx,TRIGSHIFT
add dx,CENTERX
sub dx,ax
mov [si],dx ; store pixel offset.
push es
mov ax,0A000h ; paint new pixel.
mov es,ax
xchg dx,bx
mov es:[bx],dl
pop es
mov ax,[YJAdd] ; y = y + yjadd
add [Y],ax
mov ax,[ZJAdd] ; z = z + zjadd
add [Z],ax
inc di ; posy = posy + 1
add si,2
loop ForJ
mov ax,[YIAdd] ; y0 = y0 + yiadd
add [Y0],ax
mov ax,[ZIAdd] ; z0 = z0 + ziadd
add [Z0],ax
add di,LANDSCAPEX-GRIDY ; posy = posy - gridy
pop cx ; posx = posx + 1
loop ForI
ret
DrawLandscape endp
;-----------------------------------------------------------------------------
; LandScape - Main landscape demo routine. Because this routine was tested
; using the Borland Pascal high-level interface, the allocation of the
; memory is done by the caller.
; In:
; DS - Data segment.
; MemSeg - Memory segment of 64K needed for storage.
;-----------------------------------------------------------------------------
LandScape proc MemSeg:word
local PosX:word,PosY:word,AngleY:word,AngleZ:word
mov ax,0013h ; set VGA 320x200x256 mode.
int 10h
mov ax,[MemSeg] ; setup landscape
mov [LandSeg],ax ; memory segment.
lea di,[Palette] ; set black palette.
mov ax,ds
mov es,ax
mov cx,768
xor ax,ax
cld
rep stosb
lea si,[Palette]
call SetPalette
GenPalette: lea di,[Palette] ; generate color palette.
mov ax,3F00h
mov [di+0],al ; background.
mov [di+1],al
mov [di+2],al
add di,3
mov [di+0],al ; blue. (water)
mov [di+1],al
mov [di+2],ah
add di,3
mov ax,0000h ; green to brown.
mov bx,3F00h
mov dx,0000h
mov cx,61
GP0: mov [di+0],ah
mov [di+1],bh
mov [di+2],dh
add di,3
add ax,0108h
sub bx,0086h
add dx,0000h
loop GP0
mov ax,3F00h ; brown to white.
mov bx,2000h ; (mountain)
mov dx,0000h
mov cx,48
GP1: mov [di+0],ah
mov [di+1],bh
mov [di+2],dh
add di,3
add ax,0000h
add bx,00AAh
add dx,0150h
loop GP1
mov ax,3F00h ; white. (snow)
mov bx,3F00h
mov dx,3F00h
mov cx,145
GP2: mov [di+0],ah
mov [di+1],bh
mov [di+2],dh
add di,3
add ax,0000h
add bx,0000h
add dx,0000h
loop GP2
call GenLandscape ; creates the landscape.
mov [AngleY],240 ; inclination angle.
mov [AngleZ],0 ; initial spin angle.
mov [PosX],0 ; starting landscape
mov [PosY],0 ; position.
; pixels offset array could be cleaned but not necesary,
; because i am using the 64K of video memory ...
; i can't overwrite anything! :-)
; draw hidden landscape and do flash-in effect.
call DrawLandscape,[PosX],[PosY],[AngleY],[AngleZ]
lea si,[Palette]
call FlashIn
mov [Timer],0 ; set timer counter.
mov si,1 ; starting landscape
mov di,1 ; directions.
LandLoop: call WaitVRT ; wait vertical retrace.
push si ; draw landscape.
push di
call DrawLandscape,[PosX],[PosY],[AngleY],[AngleZ]
pop di
pop si
inc byte ptr [AngleZ] ; increase spin angle.
add [PosX],si ; advance landscape position.
add [PosY],di
TestX: cmp [PosX],0 ; check for boundaries.
jl NegIncX
cmp [PosX],LANDSCAPEX-GRIDX
jl TestY
NegIncX: sub [PosX],si
neg si
TestY: cmp [PosY],0
jl NegIncY
cmp [PosY],LANDSCAPEY-GRIDY
jl CheckExit
NegIncY: sub [PosY],di
neg di
CheckExit: inc [Timer] ; timeout?
cmp [Timer],TIMEOUT
jae ByeBye
mov ah,1 ; any key pressed?
int 16h
jz LandLoop
ByeBye: call FlashOut ; flash-out!
mov ax,03h ; set 80x25x16 text mode.
int 10h
ret
LandScape endp
;-----------------------------------------------------------------------------
; Start - Startup code called from DOS.
; In:
; ES - Program Segment Prefix.
;-----------------------------------------------------------------------------
Start proc
mov ax,@Data
mov ds,ax
mov ax,ss ; shrink memory block.
mov bx,es
sub ax,bx
mov bx,sp
shr bx,4
inc bx
add bx,ax
mov ah,4Ah
int 21h
mov ah,48h ; allocate 64000 bytes.
mov bx,4000
int 21h
jc Exit
push ax
call LandScape,ax ; do demostration.
pop es
mov ah,49h ; free 64000 bytes.
int 21h
Exit: mov ax,4C00h ; exit to DOS.
int 21h
Start endp
end Start
;=============================================================================
; shades.asm - Bop Shades Demostration.
; File created: 10-21-93
; Copyright (c) 1993, Carlos Hasan Last modified: 10-21-93
;
; Description:
; This code implements bop shades using a gray palette of 64 levels in
; the VGA 320x200x256 graphics mode.
;
; Portability:
; Requires Turbo Assembler 3.2 or better to be assembled.
; Dependent on the IBM PC 286 and the VGA graphics card.
;=============================================================================
jumps
.model small,pascal
.286
dosseg ; used for linking like
.stack 1024 ; an Standalone program.
global BopShades:proc
;======================== Demo Equates and Data ==============================
TIMEOUT equ 4000 ; Number of Frames Total.
MAXWIDTH equ 320 ; Screen Dimens.
MAXHEIGHT equ 200
CENTERX equ 160-25 ; Screen Center Coord.
CENTERY equ 100-25
MAXBOPS equ 150 ; Number of Bops.
RADIUSX equ 120 ; Bops Path Radius.
RADIUSY equ 60
.data
include shades.inc ; Bop Points Table.
include sincos.inc ; Sin/Cos Table.
BopQueue dw MAXBOPS dup(?) ; Bops Positions Queue.
BopHead dw ? ; Current Queue Head.
Angle dw ? ; Bops Path Generation
Phase1 dw ? ; Parameters.
Phase2 dw ? ; Angle, Phase, Incs.
PhInc1 dw ?
PhInc2 dw ?
Frames dw ? ; Frame Counter.
;======================== Demo Routines ======================================
.code
;-----------------------------------------------------------------------------
; ShowBop - Shows a BopShade at specified position.
; In:
; DI - Position Offset.
;-----------------------------------------------------------------------------
ShowBop proc near
mov ax,0A000h
mov es,ax
xor si,si
mov cx,BOPPTS
ShowLoop: mov al,[BopAddTab+si]
shl si,1
mov bx,[BopTab+si]
shr si,1
add es:[bx+di],al
inc si
loop ShowLoop
ret
ShowBop endp
;-----------------------------------------------------------------------------
; HideBop - Hides a BopShade at specified position.
; In:
; DI - Position Offset.
;-----------------------------------------------------------------------------
HideBop proc near
mov ax,0A000h
mov es,ax
xor si,si
mov cx,BOPPTS
HideLoop: mov al,[BopAddTab+si]
shl si,1
mov bx,[BopTab+si]
shr si,1
sub es:[bx+di],al
inc si
loop HideLoop
ret
HideBop endp
;-----------------------------------------------------------------------------
; InitBops - Initializes the BopShade Queue.
;-----------------------------------------------------------------------------
InitBops proc near
mov ax,ds
mov es,ax
lea di,[BopQueue]
mov cx,MAXBOPS
mov ax,0FFFFh ; illegel offset,
cld ; because first bops
rep stosw ; are hidden.
mov [BopHead],0
ret
InitBops endp
;-----------------------------------------------------------------------------
; PutBop - Puts a new BopShade onto the Queue and updates the screen.
; In:
; (CX,DX) - Screen coordinates.
;-----------------------------------------------------------------------------
PutBop proc near
mov di,dx
imul di,MAXWIDTH
add di,cx
mov bx,[BopHead]
xchg [BopQueue+bx],di
cmp di,MAXWIDTH*MAXHEIGHT
jae PutNewBop
call HideBop
PutNewBop: mov bx,[BopHead]
mov di,[BopQueue+bx]
cmp di,MAXWIDTH*MAXHEIGHT
jae SkipShow
call ShowBop
SkipShow: add [BopHead],2
cmp [BopHead],2*MAXBOPS
jb ByePutBop
mov [BopHead],0
ByePutBop: ret
PutBop endp
;-----------------------------------------------------------------------------
; BopShades - Performs the Demostration.
; In:
; DS - Data Segment.
;-----------------------------------------------------------------------------
BopShades proc
mov ax,13h ; Sets 320x200x256 mode.
int 10h
mov dx,3C8h ; Set the Shaded Palette.
xor al,al
out dx,al
inc dx
mov cx,256
xor ah,ah
SetPal: xor al,al
out dx,al
out dx,al
mov al,ah
out dx,al
cmp ah,63
jae SetBrk
inc ah
SetBrk: loop SetPal
call InitBops ; Init BopsQueue.
mov [Angle],0 ; Init Variables.
mov [Phase1],2*1024
mov [Phase2],2*1024
mov [PhInc1],2
mov [PhInc2],3
mov [Frames],0
ShadesLoop: mov ax,[Angle] ; Compute X Coord.
imul [Phase1]
mov bl,ah
mov bh,dl
shr bx,2
xor bh,bh
mov al,[CosTable+bx]
mov ah,RADIUSX
imul ah
sar ax,6
add ax,CENTERX
mov cx,ax
mov ax,[Angle] ; Compute Y Coord.
imul [Phase2]
mov bl,ah
mov bh,dl
shr bx,2
xor bh,bh
mov al,[SinTable+bx]
mov ah,RADIUSY
imul ah
sar ax,6
add ax,CENTERY
mov dx,ax
call PutBop ; Puts BopShade at (CX,DX)
mov ax,[Angle] ; Increment Angle.
inc ax
and ax,1023
mov [Angle],ax
mov ax,[Phase1] ; Increment Phase1.
add ax,[PhInc1]
cwd
mov bx,5*1024
div bx
mov [Phase1],dx
mov ax,[Phase2] ; Increment Phase2.
add ax,[PhInc2]
cwd
mov bx,5*1024
div bx
mov [Phase2],dx
inc [Frames] ; enough frames showed?
cmp [Frames],TIMEOUT
ja ShadesBye
mov ah,1 ; any key pressed?
int 16h
je ShadesLoop
ShadesBye:
mov cx,MAXBOPS ; Hides all the Bops.
HidesLoop: push cx
mov cx,0FFFFh
mov dx,cx
call PutBop
pop cx
loop HidesLoop
mov ax,03h
int 10h
ret
BopShades endp
;-----------------------------------------------------------------------------
; Start - Startup Code called from DOS.
; In:
; DS - Program Segment Prefix.
;-----------------------------------------------------------------------------
Start proc
mov ax,@Data
mov ds,ax
call BopShades
mov ax,4C00h
int 21h
Start endp
end Start
;=============================================================================
; worm.asm - Worm Hole palette demostration.
; File created: 10/04/93
; Copyright (c) 1993, Carlos Hasan Last modified: 10/04/93
;
; Description:
; This file demostrates a palette animation routine, the main piccy
; was created using the pascal source file. This one uses the VGA card
; in 320x200x256 graphics mode.
;
; Portability:
; Requires Turbo Assembler 3.2 or better to be assembled.
; Dependent on the IBM PC 286 and the VGA graphics card.
;
; Modifications:
; 10/22/93 - Startup Code and Picture on .OBJ file.
;=============================================================================
.model small,pascal
.286
dosseg ; used to link like
.stack 1024 ; and standalone program.
global WormHole:proc
global WormPic:byte ; in WORMRAW.OBJ file.
;====================== Demo Equates and Data ================================
TIMEOUT equ 70 * 8 ; About 8 sec for timeout.
.data
Palette db 768 dup (?) ; hold the color palette
FadePalette db 768 dup (?) ; and the faded palette.
Timer dw ? ; timer counter.
;========================== Demo routines ====================================
.code
;-----------------------------------------------------------------------------
; SetPalette - set the 256 entries of the VGA color palette.
; In:
; DS:SI - Palette structure address.
;-----------------------------------------------------------------------------
SetPalette proc near
mov cx,768
mov dx,3C8h
xor al,al
out dx,al
mov dx,3DAh
WaitVRT1: in al,dx ; wait the start of
test al,8 ; vertical retrace.
jz WaitVRT1
WaitVRT2: in al,dx ; wait the end of
test al,8 ; vertical retrace.
jnz WaitVRT2
mov dx,3C9h
rep outsb
ret
SetPalette endp
;-----------------------------------------------------------------------------
; RotPalette - Rotates the palette and do fading.
; In:
; Palette - Source palette.
; Fade - Fading level.
;-----------------------------------------------------------------------------
RotPalette proc near Fade:word
mov ax,ds
mov es,ax
lea di,[FadePalette]
mov cx,16*3
xor ax,ax
cld
rep stosb
lea si,[Palette+32*3]
mov cx,224*3
cld
rep movsb
lea si,[Palette+16*3]
mov cx,16*3
rep movsb
lea bx,[FadePalette]
mov cx,16
RotLoop: push cx
mov si,bx
mov di,bx
lodsb
mov ah,al
lodsb
mov dl,al
lodsb
mov dh,al
mov cx,15*3
rep movsb
mov al,ah
stosb
mov al,dl
stosb
mov al,dh
stosb
add bx,16*3
pop cx
loop RotLoop
lea si,[FadePalette]
lea di,[Palette]
mov cx,768
rep movsb
lea si,[FadePalette]
mov cx,768
mov dx,[Fade]
FadeLoop: mov al,[si]
mul dl
shr ax,7
mov [si],al
inc si
loop FadeLoop
lea si,[FadePalette]
call SetPalette
ret
RotPalette endp
;-----------------------------------------------------------------------------
; WormHole - Worm Hole demostration.
; In:
; DS - Data segment.
; PicSeg - 320x200x256 picture segment address.
;-----------------------------------------------------------------------------
WormHole proc PicPtr:dword
local Fade:word
mov ax,0013h ; set 320x200x256 mode.
int 10h
mov ax,ds ; set black palette.
mov es,ax
lea di,[Palette]
mov cx,768
xor ax,ax
cld
rep stosb
lea si,[Palette]
call SetPalette
lea di,[Palette] ; generate the palette.
mov cx,256
xor bx,bx
GenPalette: mov ax,bx
shr ax,4
and ax,0Fh
shl ax,2
mov [di+0],al
mov ax,bx
and ax,0Fh
shl ax,1
mov [di+1],al
mov al,3Fh
mov [di+2],al
add di,3
inc bx
loop GenPalette
push ds ; write the picture.
mov ax,0A000h
mov es,ax
lds si,[PicPtr]
xor di,di
mov cx,320*200
cld
rep movsb
pop ds
mov [Fade],0
mov [Timer],0
WormIn: call RotPalette,[Fade] ; rotate palette.
cmp [Fade],128 ; adjust fade level.
jae WormTime
inc [Fade]
WormTime: inc [Timer] ; check if timeout,
cmp [Timer],TIMEOUT
jae WormOut
WormKey: mov ah,1 ; or any key pressed.
int 16h
jz WormIn
WormOut: cmp [Fade],128 ; start fading-out.
ja WormExit
call RotPalette,[Fade]
dec [Fade]
jmp WormOut
WormExit: mov ax,03h ; restore 80x25x16 textmode.
int 10h
ret
WormHole endp
;-----------------------------------------------------------------------------
; Start - Startup Code called from DOS.
; In:
; ES - Program Segment Prefix.
;-----------------------------------------------------------------------------
Start proc
mov ax,@Data
mov ds,ax
call WormHole,SEG WormPic,OFFSET WormPic
mov ax,4C00h
int 21h
Start endp
end Start
;=============================================================================
; txtfx.asm - Texture Effect Demostration.
; File created: 11/03/93
; Copyright (c) 1993, Carlos Hasan Last modified: 11/04/93
;
; Description:
; This file implements a texture algorithm that maps repeteadly into
; screen a picture of 128x128x256 using the tweaked 80x200x256 mode.
;
; Portability:
; Requires Turbo Assembler 3.2 or better to be assembled.
; Dependent on the IBM PC 286 and the VGA graphics card.
;=============================================================================
ideal
model small,pascal
jumps
p286
dosseg ; Used for Standalone DOS programs.
stack 1024 ; Sets the Stack with 1KB of space.
ends ; Must close stack segment!
;===================== External Data =========================================
global PicRaw:far ; 128x128x256 Image.
global PicPal:far ; RGB Image Palette.
global TextFx:proc
;===================== Demo Equates ==========================================
dataseg
MAXWIDTH equ 80 ; Screen Dimensions.
MAXHEIGHT equ 200
BMPHEIGHT equ 128 ; Image Bitmap Dimensions.
BMPWIDTH equ 128
BMPMASK equ 3FFFh ; Image Position Mask.
TIMEOUT equ 1800 ; Max Number of Frames for TimeOut.
ROTSPEED equ 2 ; Rotation Speed Factor.
AMPSPEED equ 4 ; Amplify Speed Factor.
FADESPEED equ 6 ; Fadeout Speed Factor.
include "SinCos.Inc" ; Sinus/Cosinus Table.
;======================== Demo Routines ======================================
codeseg
;-----------------------------------------------------------------------------
; SetGraphMode - Sets the tweaked 80x200x256 VGA mode.
;-----------------------------------------------------------------------------
proc SetGraphMode
mov ax,13h ; Sets VGA 320x200x256 mode.
int 10h
mov dx,3C4h ; Disable Chain-Four.
mov al,04h
out dx,al
inc dx
in al,dx
and al,0F7h
out dx,al
mov dx,3C4h ; Enable All Planes.
mov ax,0F02h
out dx,ax
mov ax,0A000h ; Clear Video Memory
mov es,ax
xor di,di
xor ax,ax
mov cx,8000h
cld
rep stosw
mov dx,3D4h ; Normal Word Addressing.
mov al,14h
out dx,al
inc dx
in al,dx
and al,0BFh
out dx,al
dec dx ; Address Output Byte Mode.
mov al,17h
out dx,al
inc dx
in al,dx
or al,40h
out dx,al
ret
endp SetGraphMode
;-----------------------------------------------------------------------------
; SetTextMode - Restores 80x25x16 text mode.
;-----------------------------------------------------------------------------
proc SetTextMode
mov ax,03h
int 10h
ret
endp SetTextMode
;-----------------------------------------------------------------------------
; WaitVR - Waits the Next Vertical Retrace.
;-----------------------------------------------------------------------------
proc WaitVR
mov dx,3DAh
WaitNotVRT:
in al,dx
test al,8
jne WaitNotVRT
WaitEndVRT:
in al,dx
test al,8
je WaitEndVRT
ret
endp WaitVR
;-----------------------------------------------------------------------------
; SetPalette - Sets the current VGA color palette.
; In:
; DS:SI - Palette Address.
;-----------------------------------------------------------------------------
proc SetPalette
call WaitVR
mov dx,3C8h
xor al,al
out dx,al
inc dx
mov cx,768
cld
rep outsb
ret
endp SetPalette
;-----------------------------------------------------------------------------
; FadeOut - Fades out the RGB Palette.
; In:
; DS:SI = Palette Address.
;-----------------------------------------------------------------------------
proc FadeOut
push si
push ds
mov cx,768
xor bx,bx
mov di,si
DecPal: sub [byte ptr di],FADESPEED
jnc NotDec
inc bx
mov [byte ptr di],0
NotDec: inc di
loop DecPal
push bx
call SetPalette
pop bx
pop ds
pop si
cmp bx,768
jb FadeOut
ret
endp FadeOut
;-----------------------------------------------------------------------------
; RotImage - Puts on the screen the rotated image.
; In:
; DeltaX,DeltaY = Rotation Parameters.
; Image = Source 128x128x256 Image Bitmap.
;-----------------------------------------------------------------------------
proc RotImage DeltaX:word,DeltaY:word,Image:word
local AddX:word:MAXWIDTH,AddY:word:MAXHEIGHT
push ds
push es
shl [DeltaX],1 ; Makes the Horiz Array
shl [DeltaY],1 ; of increments for the
mov cx,MAXWIDTH ; Rotation.
xor bl,bl
xor dl,dl
lea di,[AddX]
MakeAddX:
xor bh,bh
xor dh,dh
add bx,[DeltaX]
add dx,[DeltaY]
mov al,dh
cbw
imul si,ax,BMPWIDTH
mov al,bh
cbw
add ax,si
mov [ss:di],ax
add di,2
loop MakeAddX
sar [DeltaX],1 ; Makes the Vert Array
sar [DeltaY],1 ; of increments for the
mov cx,MAXHEIGHT ; Rotation.
xor bl,bl
xor dl,dl
lea di,[AddY]
MakeAddY:
xor bh,bh
xor dh,dh
sub bx,[DeltaY]
add dx,[DeltaX]
mov al,dh
cbw
imul si,ax,BMPWIDTH
mov al,bh
cbw
add ax,si
mov [ss:di],ax
add di,2
loop MakeAddY
mov ax,0A000h ; Start drawing at the top left
mov es,ax ; screen corner.
xor di,di
mov ds,[Image] ; Load Source Image Address.
xor si,si
mov dx,BMPMASK ; Load Image Position Mask.
lea bx,[AddY]
mov cx,MAXHEIGHT
cld
DrawScanLines:
push si
OFF=0 ; This Loop have been unrolled
REPT MAXWIDTH/2 ; for fastest drawing.
and si,dx ; Also, the drawwing is done
mov al,[si] ; putting two pixels at once.
add si,[ss:AddX+OFF]
and si,dx
mov ah,[si]
add si,[ss:AddX+OFF+2]
stosw
OFF=OFF+4
ENDM
pop si
add si,[ss:bx] ; Next Scan Line.
add bx,2
dec cx
jne DrawScanLines
pop es
pop ds
ret
endp RotImage
;-----------------------------------------------------------------------------
; TextFx - Performs the Demostration.
; In:
; DS = Data Segment.
; Image = Source Image Segment.
; Palette = Image RGB Palette.
;-----------------------------------------------------------------------------
proc TextFx Image:word,Palette:dword
pusha
push ds
push es
call SetGraphMode ; Init Graphics Mode.
push ds
lds si,[Palette] ; Sets the RGB Palette.
call SetPalette
pop ds
xor bx,bx ; Init Rotation Angle.
mov dx,32 ; Init Amplify Factor.
TextFxLoop:
add bl,ROTSPEED ; Increase Rot Angle.
add dx,AMPSPEED ; Increase Amplify Factor.
mov cl,[SinTable+bx]
mov ch,[CosTable+bx]
push bx
push dx
mov al,cl ; Amplify Rotation Parameters
cbw ; using the Amplify Factor.
imul dx
mov al,ah
mov ah,dl
mov bx,ax
pop dx
push dx
mov al,ch
cbw
imul dx
mov al,ah
mov ah,dl
call RotImage,ax,bx,[Image]
mov ah,1 ; Any Key Pressed?
int 16h
pop dx
pop bx
jz CheckTimeOut
mov ah,0
int 16h
jmp TextExit
CheckTimeout:
cmp dx,TIMEOUT ; Enough Frames Showed?
jb TextFxLoop
TextExit:
lds si,[Palette] ; Fade out the Palette.
call FadeOut
call SetTextMode ; Restores 80x25x16 Text Mode.
pop es
pop ds
popa
ret
endp TextFx
;-----------------------------------------------------------------------------
; Start - Startup code called from DOS.
; In:
; ES = Program Segment Prefix.
;-----------------------------------------------------------------------------
proc Start
mov ax,@Data ; Setup Data Segment.
mov ds,ax ; Do the Demostration.
call TextFx,SEG PicRaw,SEG PicPal,OFFSET PicPal
mov ax,4C00h
int 21h ; Exit to DOS.
endp Start
end Start
