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- ;void char_line_b(ch,dir,col,row,length,color);
- ; unsigned char ch,dir,col,row,length,color;
-
- EXTRN _memory_model:byte
- EXTRN _video_page:byte
-
- _TEXT SEGMENT BYTE PUBLIC 'CODE'
- ASSUME CS:_TEXT
- PUBLIC _char_line_b
- _char_line_b proc near
- push bp ;
- mov bp,sp ;set up stack frame
- push di ;
- cmp _memory_model,0 ;near or far?
- jle begin ;jump if near
- inc bp ;else add 2 to BP
- inc bp ;
- begin: push ds ;save DS
- mov bh,_video_page ;get video page number
- mov dl,[bp+8] ;COL in DL
- dec dl ;count from 0
- mov dh,[bp+10] ;ROW in DH
- dec dh ;count from 0
- mov ah,2 ;function to set cursor
- int 10h ;set cursor to line
- sub cx,cx ;
- mov cl,[bp+12] ;string length in CX
- jcxz L3 ;quit if zero
- mov bl,[bp+14] ;attribute in BL
- mov al,[bp+4] ;char in AL
- mov ah,[bp+6] ;get direction param
- cmp ah,'V' ;write vertically?
- je L1 ;jump ahead if so
- cmp ah,'v' ;test for small 'v'
- je L1 ;jump if small 'v'
- mov ah,9 ;BIOS function number
- int 10h ;write horizontally
- jmp short L3 ;go quit routine
- L1: mov di,cx ;count length in DI
- mov cx,1 ;write 1 char each time
- L2: mov ah,9 ;function to write char
- int 10h ;write it
- dec di ;dec length counter
- or di,di ;zero yet?
- jz L3 ;quit if zero
- push ax ;else save char
- mov ah,2 ;function to set cursor
- inc dh ;inc row number
- int 10h ;reset cursor
- pop ax ;restore character
- jmp short L2 ;go write next
- L3: pop ds ;
- pop di ;
- pop bp ;
- cmp _memory_model,0 ;quit
- jle quit ;
- db 0CBh ;RET far
- quit: ret ;RET near
- _char_line_b endp
- _TEXT ENDS
- END