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LL_LAND.ZIP
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LL_INIT.INC
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1993-05-11
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3KB
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85 lines
;;
;; [ Lord Logics Unchained Mode INIT ]
;;
ll_xinit proc
push es
push di
push ds
mov ax,@data
mov ds,ax
cli ;; Don't INTerrupt us!
ll_port 03C4h,04h ;; Sequencer: Memory Mode
and al,11110101b ;; Disable ODD/EVEN Mode
or al,00000100b ;; Select Chain 4
out dx,al ;; Disable Extended Memory
ll_port 03CEh,05h ;; Graphics: Mode Register
and al,11101111b ;; Disable ODD/EVEN Mode
out dx,al ;; :
ll_port 03CEh,06h ;; Graphics: Misc Register
and al,11110101b ;; Disable CHAIN ODD/EVEN
or al,00000100b ;; Memory Mode to A0000-AFFFF
out dx,al ;; :
ll_port 03D4h,14h ;; LLT Controller: Underline Loc
and al,10111111b ;; Disable DOUBLE WORD
out dx,al
ll_port 03D4h,17h ;; CRT Controller: Mode Control
or al,01000000b ;; Set BYTE MODE
and al,11011111b ;; Set Address Wrap
out dx,al
ll_flip ;; Clear the FLIP-FLOP
ll_attr 10h ;; Attr Controller: Mode Control
mov al,01100001b ;; Set lotsa stuff . . .
out dx,al ;; :
ll_port 03C4h,02h ;; Sequencer: Map Mask
mov al,00001111b ;; Enable Planes 0,1,2,3
out dx,al ;; :
sti
mov di,0A000h ;; Clear the VIDEO MEMORY
mov es,di ;; :
xor di,di ;; :
xor ax,ax ;; :
mov cx,32000 ;; :
@@: mov es:[di],ax ;; :
add di,2 ;; :
dec cx ;; :
jnz @B ;; :
cli
ll_attr 33h ;; Attr Controller: Horiz Pix Pan
xor al,al ;; Clear the HORIZ PIX PAN
out dx,al ;; :
ll_port 03D4h,13h ;; CRT Controller: Offset Register
mov al,(LL_HOR/8) ;; Set OFFSET to # of chrs (REAL/4)
out dx,al ;; :
ll_port 03D4h,0Ch ;; CRT Controller: Start Addr High
mov ax,LL_SHOW ;; Set HIGH ADDRESS to SHOW_PAGE
mov al,ah ;; :
out dx,al ;; :
ll_port 03D4h,0Dh ;; CRT Controller: Start Addr Low
mov ax,LL_SHOW ;; Set LOW ADDRESS to SHOW_PAGE
out dx,al ;; :
sti ;; INTerruptions are OK now!
xor ax,ax ;; Clear return flag
cr_id: pop ds
pop di
pop es
ret
ll_xinit endp