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Programming Sound Cards
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Programming Sound Cards.iso
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sound_31
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display.asm
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Assembly Source File
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1995-01-01
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4KB
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228 lines
kline db "│ xxxk/xxxk",0
kline2 db "xxxk",0
repstr db " ~ ",0
OrigMemory dw 0
CursorType dw 0
Screen dw 0B800h
ScreenFix dw 0
OldMode db 0
CurMode db 0
proc HowMuchMemory near
mov ah,48h
mov bx,0FFFFh
int 21h
shr bx,6
mov [cs:OrigMemory],bx
ret
endp HowMuchMemory
proc RestoreMode
xor ah,ah
mov al,[cs:OldMode]
int 10h
ret
endp RestoreMode
proc SetMode near
xor ah,ah
mov al,[cs:CurMode]
int 10h
ret
endp SetMode
proc DetermineDisplay near
mov ax,0f00h
int 10h
mov [cs:OldMode],al
cmp al,7 ; Are we in monochrome mode?
jz @@Monochrome
mov [Word cs:Screen],0B800h
mov [Word cs:CursorType],0607h
mov [Byte cs:CurMode],3
ret
@@Monochrome: mov [Word cs:Screen],0B000h
mov [Word cs:CursorType],0B0Ch
mov [Byte cs:CurMode],7
ret
endp DetermineDisplay
; CX - Scan Lines
proc SetCursor near
mov [cs:CursorType],cx
mov ax,0100h
int 10h
ret
endp SetCursor
; bx - X
; dx -Y
; cx:si - Loc
; ax - Len
; di - Attr
proc WriteChars near
push ds si bx cx dx di
mov es,[cs:Screen]
push ax
mov ax,160
mul dx
add ax,bx
add ax,bx
mov di,ax
mov ds,cx
pop cx
push di
mov ax,0
rep stosw
pop di
pop ax
jmp ActualWritePart
endp WriteChars
; bx - X
; dx - Y
; cx:si - offset of string in DS
proc Write near
push ds si bx cx dx
mov es,[cs:Screen]
mov ax,160
mul dx
add ax,bx
add ax,bx
mov di,ax
mov ds,cx
lodsb
ActualWritePart:
mov ah,al
xor cx,cx
xor dx,dx
@@MainLoop: lodsb
cmp al,0
jz @@Done
cmp al,'`'
jnz @@CheckRepeat
lodsb
mov ah,al
jmp @@MainLoop
@@CheckRepeat: cmp al,'~'
jnz @@JustStore
lodsb
mov cl,al
lodsb
rep stosw
add dx,cx
jmp @@MainLoop
@@JustStore: inc dx
stosw
jmp @@MainLoop
@@Done: pop dx cx bx si ds
ret
endp Write
; ax - NumK
; dx - NumDigits
; cx:di - String
proc ConvertKToStr near
push es
mov es,cx
mov cx,dx
dec cx
add di,cx
inc cx
@@NumLoop: mov bl,10
div bl
add ah,'0'
mov [es:di],ah
dec di
xor ah,ah
loop @@NumLoop
pop es
ret
endp ConvertKToStr
proc WriteMemLeft near
mov ah,48h
mov bx,0FFFFh
int 21h
shr bx,6
push bx
mov ax,[cs:OrigMemory]
mov dx,3
mov cx,seg kline
mov di,offset kline+8
call ConvertKToStr
pop ax
mov dx,3
mov cx,seg kline
mov di,offset kline+3
call ConvertKToStr
mov bx,freek_Col
mov dx,freek_Line
mov cx,seg kline
mov si,offset kline
call Write
ret
endp WriteMemLeft
proc MakeDec near
push di
dec cx
add di,cx
inc cx
xor ah,ah
@@NumLoop: mov bl,10
div bl
add ah,'0'
mov [es:di],ah
dec di
xor ah,ah
loop @@NumLoop
@@Done: pop di
ret
endp MakeDec
HexStuff db '0123456789ABCDEF'
proc MakeHex near
push di
push ax
and al,0F0h
shr al,4
mov bl,al
mov bh,0
mov ah,[cs:bx+HexStuff]
mov [es:di],ah
inc di
pop ax
and al,0Fh
mov bl,al
mov bh,0
mov ah,[cs:bx+HexStuff]
mov [es:di],ah
pop di
ret
endp MakeHex
proc DirectWrite1 near
push es
mov es,[cs:Screen]
@@1: lodsb
inc di
stosb
loop @@1
pop es
ret
endp DirectWrite1
proc DirectWrite2 near
push es
mov es,[cs:Screen]
@@1: inc di
stosb
loop @@1
pop es
ret
endp DirectWrite2