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- ; ** THE SLOOOW ONE PIXEL ACCURACY SINE WAVE BY TANGO **
- ; ** RAY SEE IF YOU CAN GET THIS ONE TO GO FASTER !!! **
- ; ** ONLY GIVE THE SOURCE TO CRYPTIC MEMBERS. **
-
- opt c-
- section blitter,code_c Chip Ram please !!
- include df1:definitions Give me some hardware reggies
- include df1:macros Give me some macros
-
-
- ;LOCAL CONSTANTS
-
- icra equ $bfed01
- allocmem =-30-168
- freemem =-30-180
-
-
- TAKEOVER:
-
- LEA custom,a5
- LEA GFXLIB(PC),a1 Point to 'graphics.library'
- MOVEQ #0,D0 Doesn't matter which version
- MOVE.L 4.w,a6 EXECBASE
- jsr -132(a6) task switching off (forbid)
- JSR -$228(a6) Openlibrary
- MOVE.L D0,GFXBASE Store library address
-
-
- move.l GFXBASE,d0 Move gfxbase offset to d0
- MOVE.L D0,A6
- MOVE.W #$80,dmacon(a5) Turn off copper whilst changing it
- MOVE.L $32(A6),WBCOPPER Store old (WBench) copper address
- MOVE.L #OURCOPPER,$32(A6) Point to new copper list (our own)
- MOVE.W #$8080,dmacon(a5) re-enable copper
-
- MOVE.W #$8010,intena(a5)
- MOVE.L $6c,old Save work bench interrupt
- MOVE.L #LEV3,$6c This sets up a level 3 interrupt
- move.w intenar(a5),systemints
- move.b #%01111111,icra Kill keyboard
-
- WAIT:
- BTST #6,$BFE001 This waits for the left
- BNE.S WAIT mouse button to be pressed
- move.l 4.w,a6 EXECBASE
- MOVE.L old,$6c Restore system interrupts
- MOVE.L GFXBASE,A6
- MOVE.W #$80,dmacon(a5) Disable DMA
- MOVE.L WBCOPPER,$32(A6) Restore old copperlist
- MOVE.W #$8080,dmacon(a5) Enable DMA
- move.w systemints,d0 Systems interrupt
- or.w #$c000,d0
- move.w d0,intena(a5) Enable OS interrupts
- move.b #%10011011,icra Enable keyboard
- clr.w $dff0a8 Clear music
- clr.w $dff0b8
- clr.w $dff0c8
- clr.w $dff0d8
- move.w #$f,$dff096
- rts
-
-
- ERROR:
- move.l 4.w,a6 Get EXECBASE
- jsr -138(a6) Permit ( multi-tasking on )
- moveq #0,d0 Clear d0
- RTS Return to AmigaDOS
-
-
- ;This is the NEW level 3 interrupt
-
- LEV3:
- MOVEM.L d0-d7/a0-a6,-(sp) Save all registers to the stack
- lea custom,a5
- AND #$10,intreqr(a5) Check if interrupt is from Copper
- BNE out
- move.w #$8010,$9c
-
- bsr try_sin
- bsr scroll
-
- move.l sin_screen,d1 Bitplane memory address
- move.w d1,bp1lo+2
- swap d1
- move.w d1,bp1hi+2
-
-
- out:
- MOVEM.L (sp)+,d0-d7/a0-a6 Restore the registers
- DC.W $4ef9 hex value for JMP instruction
- old:
- DC.L 0 will jump to normal interrupt
-
-
- ; ** Double Buffer The Screen **
-
- Buff:
- Eor.l #10240,Tango
- Move.l Tango,D1
- Move.l #SinePlane,d2
- Add.l D1,d2
- Move.l D2,Sin_Screen
- Rts
-
-
- ; ** THE SCROLL ROUTINE **
-
- scroll
- cmp.l #15,val Blitshifted all <<<
- blo.s coarse_scroll_it No then get doing it !!
- bsr blit_char Blit letter to screen
- clr.l val Reset index
- coarse_scroll_it:
- bsr coarse Scroll all line
- rts
-
-
- ; ** BLIT LETTER ON THE SCREEN **
-
- blit_char
- jsr text
- lea custom,a5 Get custom chip address
- move.l screenx,a0 Can~t see this picture !!
- move.l #font,a1 Put font in blitter source
- add.l d1,a1
- blit_test:
- btst #14,$dff002 Blitter busy !!!
- bne blit_test Lets wait till she finishes !
- move.w #$ffff,bltafwm(a5) Mask (DON'T NEED ONE)
- move.w #$ffff,bltalwm(a5) Mask (DON'T NEED ONE)
- move.l a0,bltdpth(a5) Blitter dest D (BOTTOM OF SCREEN)
- move.l a1,bltapth(a5) Blitter source A (SCROLLING FONT)
- move.w #38,bltamod(a5) Modulo (20-1)*2
- move.w #38,bltdmod(a5) Modulo (20-1)*2
- move.w #$9f0,bltcon0(a5) Minterms D=A
- clr.w bltcon1(a5) Set Ascending mode
- move.w #16*64+1,bltsize(a5) Blit size (SIZE OF FONT)
- rts Return
-
-
- ; ** BLITSHIFT THE ENTIRE SCROLL LINE (BETTER THAN USING THE HARDWARE).
-
- coarse:
- lea custom,a5
- move.l screenx,a0 ; Can~t see this picture !!
- move.l a0,a1
- add.l #2,a1
- blit_wait:
- btst #14,$dff002
- bne blit_wait
- incl #1,val ; (1 for slower)
- move #15,d7 ; Amount of pixels to shift(15 for slow)
- ror #4,d7 ; Set to correct bits (12-15)
- or #%100111110000,d7
- move.l #-1,bltafwm(a5)
- move.l a1,bltapth(a5)
- move.l a0,bltdpth(a5)
- move.w #0,bltamod(a5)
- move.w #0,bltdmod(a5)
- move.w d7,bltcon0(a5)
- move.w #80*64+20,bltsize(a5)
- rts
-
-
- ; ** BLITTER CLEAR WHERE THE SINE SCROLL HAS JUST BEEN **
-
- CLEAR:
- Move.l Sin_Screen,a0
- wate
- btst #14,$dff002
- bne.s wate
- Move.l a0,Bltdpth(a5)
- Move #0,Bltdmod(a5)
- Move.l #$1f00000,Bltcon0(a5)
- Move #150*64+20,Bltsize(a5)
- Rts
-
-
- try_sin:
- Bsr buff
- bsr clear
- Move.l Table1,A3
- Move.b (A3),d1
- Cmp.b #$ff,d1
- Bne ItsOkYa
- Move.l #SinTab,A3
- ItsOkYa
- Add.l hi_amplitude,A3
- Move.l a3,Table1
- Move.l A3,Table
- lea custom,a5
- move.l screenx,a0 ; Source A
- move.l #20,d4 ; Number of chars along screen
- clr.l d5
- clr.l d6
- ban:
- move.w #%1000000000000000,d3
- move.l #15,d2
- blit_test0:
- btst #14,$dff002
- bne blit_test0
- move.l sin_screen,a1
- bsr get_sinvalue
- move.w d3,bltafwm(a5)
- move.w d3,bltalwm(a5)
- move.l a1,bltdpth(a5)
- move.l a1,bltbpth(a5)
- move.l a0,bltapth(a5)
- move.w #38,bltamod(a5)
- move.w #38,bltdmod(a5)
- move.w #38,bltbmod(a5)
- move.w #$dfc,bltcon0(a5)
- clr.w bltcon1(a5)
- move.w #16*64+1,bltsize(a5)
- lsr.w #1,d3
- dbf d2,blit_test0
- add.l #2,a0 ; Get next letter along
- add.l #2,d6
- dbf d4,ban
- rts
-
- get_sinvalue:
- Clr.l D5
- Move.l Table,A3
- Move.b (A3),d5
- cmp.b #$ff,d5
- bne cryptic90
- Move.l #SinTab,A3
- Move.b (a3),d5
- cryptic90
- Add.l lo_amplitude,A3
- Move.l A3,Table
- mulu #40,d5
- add.l d5,a1
- Add.l D6,A1
- rts
- Table1: Dc.l SinTab
- table: dc.l sintab
- sintab:
- dc.b $3C,$3F,$42,$46,$49,$4C,$50,$53,$56,$59
- dc.b $5C,$5F,$61,$64,$67,$69,$6B,$6D,$6F,$71
- dc.b $72,$73,$75,$76,$76,$77,$77,$77,$77,$77
- dc.b $77,$76,$76,$75,$73,$72,$71,$6F,$6D,$6B
- dc.b $69,$67,$64,$61,$5F,$5C,$59,$56,$53,$50
- dc.b $4C,$49,$46,$42,$3F,$3C,$38,$35,$31,$2E
- dc.b $2B,$27,$24,$21,$1E,$1B,$18,$16,$13,$10
- dc.b $E,$C,$A,$8,$6,$5,$4,$2,$1,$1
- dc.b $0,$0,$0,$0,$0,$0,$1,$1,$2,$4
- dc.b $5,$6,$8,$A,$C,$E,$10,$13,$16,$18
- dc.b $1B,$1E,$21,$24,$27,$2B,$2E,$31,$35
- dc.b $38,255
- EVEN
-
-
- ; ** CHARACTER DECODER ROUTINE **
-
- text:
- move.l acurent,a2 Get message
- clr.l d1
- move.b (a2)+,d1 Update it
- move.b d1,letter Store in offset
- cmp.b #255,d1 Check for end of message
- beq.w rst_text If equal, then reset
- sub.l #32,d1 Subract 32 (ie space)
- asl d1 Times by 2
- move.l a2,acurent Update acurent
- CMP.B #"4",letter Is letter "K" or larger
- BPL.s add_more If larger then add on
- rts Return
- add_more:
- CMP.B #"H",letter Is letter "U" or larger
- BPL.S add_more2 If larger then add on
- add.l #40*15,d1 Get next line down (KLMNOPQRST)
- rts
- add_more2:
- add.l #40*30,d1 Get next line down (UVWXYZ0123)
- rts
- rst_text:
- move.l #0,d1
- move.l #message,d2 Get begining of text
- move.l d2,acurent Reset to begining
- rts Return
-
-
- message:
-
-
- DC.B " HI RAY THIS IS THE 1 PIXEL SINE SCROLL AND AS YOU CAN SEE ITS SLOW"
- DC.B " SEE IF KODAK CAN SPEED IT UP !!!!! SEE YOU WRAP "
- DC.B 255
- EVEN
-
-
- ; ** THE COPPERLIST **
-
- OURCOPPER:
- dc.w $120,0
- dc.w $122,0
- dc.w bpl1mod,0,bpl2mod,0
- dc.w diwstrt,$2c81+16,diwstop,$2cc1
- dc.w bplcon0,$1200,bplcon1,$0000
- dc.w ddfstrt,$38,ddfstop,$d0
- dc.w color00,$000,color01,$094
- bp1lo: dc.w bpl1ptl,$0000
- bp1hi: dc.w bpl1pth,$0000
- wait $2c09,$fffe
- dc.w color01,$f00
- wait $2e09,$fffe
- dc.w color01,$f11
- wait $3009,$fffe
- dc.w color01,$f00
- wait $3209,$fffe
- dc.w color01,$f11
- wait $3409,$fffe
- dc.w color01,$f22
- wait $3609,$fffe
- dc.w color01,$f33
- wait $389,$fffe
- dc.w color01,$f44
- wait $3a09,$fffe
- dc.w color01,$f55
- wait $3c09,$fffe
- dc.w color01,$f66
- wait $3e09,$fffe
- dc.w color01,$f77
- wait $4009,$fffe
- dc.w color01,$f88
- wait $4209,$fffe
- dc.w color01,$f99
- wait $4409,$fffe
- dc.w color01,$faa
- wait $4609,$fffe
- dc.w color01,$fbb
- wait $4809,$fffe
- dc.w color01,$fcc
- wait $4a09,$fffe
- dc.w color01,$fdd
- wait $4c09,$fffe
- dc.w color01,$fee
- wait $4e09,$fffe
- dc.w color01,$fff
- wait $5109,$fffe
- dc.w color01,$eef
- wait $5309,$fffe
- dc.w color01,$ddf
- wait $5509,$fffe
- dc.w color01,$ccf
- wait $5709,$fffe
- dc.w color01,$bbf
- wait $5909,$fffe
- dc.w color01,$aaf
- wait $5b09,$fffe
- dc.w color01,$99f
- wait $5d09,$fffe
- dc.w color01,$88f
- wait $5f09,$fffe
- dc.w color01,$77f
- wait $6109,$fffe
- dc.w color01,$66f
- wait $6309,$fffe
- dc.w color01,$55f
- wait $6509,$fffe
- dc.w color01,$44f
- wait $6709,$fffe
- dc.w color01,$33f
- wait $6909,$fffe
- dc.w color01,$22f
- wait $6a09,$fffe
- dc.w color01,$11f
- wait $6c09,$fffe
- dc.w color01,$00f
- wait $6e09,$fffe
- dc.w color01,$11f
- wait $7109,$fffe
- dc.w color01,$22f
- wait $7309,$fffe
- dc.w color01,$33f
- wait $7509,$fffe
- dc.w color01,$44f
- wait $7709,$fffe
- dc.w color01,$55f
- wait $7909,$fffe
- dc.w color01,$66f
- wait $7a09,$fffe
- dc.w color01,$77f
- wait $7c09,$fffe
- dc.w color01,$88f
- wait $7e09,$fffe
- dc.w color01,$99f
- wait $8009,$fffe
- dc.w color01,$aaf
- wait $8209,$fffe
- dc.w color01,$bbf
- wait $8409,$fffe
- dc.w color01,$ccf
- wait $8609,$fffe
- dc.w color01,$ddf
- wait $8809,$fffe
- dc.w color01,$eef
- wait $8a09,$fffe
- dc.w color01,$fff
- wait $8c09,$fffe
- dc.w color01,$fee
- wait $8e09,$fffe
- dc.w color01,$fdd
- wait $9109,$fffe
- dc.w color01,$fcc
- wait $9309,$fffe
- dc.w color01,$fbb
- wait $9509,$fffe
- dc.w color01,$faa
- wait $9709,$fffe
- wait $9909,$fffe
- dc.w color01,$f99
- wait $9b09,$fffe
- dc.w color01,$f88
- wait $9d09,$fffe
- dc.w color01,$f77
- wait $9f09,$fffe
- dc.w color01,$f66
- wait $a109,$fffe
- end_copper
-
-
- ;LOCAL CONSTANTS
-
- WBCOPPER: DC.L 0
- GFXLIB: DC.B "graphics.library",0
- GFXBASE: DC.L 0
- systemints: dc.l 0
- scroll_offset: dc.l 0
- screenx: dc.l picture
- letter: dc.b 0
- acurent: dc.l message
- val: dc.l 0
- lo_amplitude: dc.l 1
- hi_amplitude: dc.l 2
- Tango Dc.l 0
- sin_screen: Dc.l SinePlane
-
-
- ;BINARY FILES TO BE INCLUDED
- EVEN
- picture
- dcb.b 10240,0
- SinePlane
- dcb.b 10240,0
- dcb.b 10240,0
- font
- incbin df1:neatfont.bin
-
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