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Simtel MSDOS - Coast to Coast
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simteldosarchivecoasttocoast.iso
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bl.asm
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Assembly Source File
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1994-03-05
|
564b
|
24 lines
; BL - Blank the screen to REAL top line
; Programmed by Richard Gillmann (Gillmann@ISIB)
rbda segment at 40h ; rom bios data area
org 50h
curpos dw ? ; cursor posn
rbda ends
cseg segment public 'code'
assume cs:cseg,ds:cseg
org 100h
start proc far
mov ax,6*256+0 ; scroll up
mov bh,7 ; normal attribute
mov cx,0 ; upper left corner
mov dx,24*256+79 ; last row
int 10h ; bios video function
mov ax,rbda ; rom bios data area
mov es,ax ; to extra seg
assume es:rbda
mov curpos,-256 ; set fake posn
int 20h ; done
start endp
cseg ends
end start