mirror of
https://github.com/vxunderground/MalwareSourceCode.git
synced 2024-12-25 04:45:27 +00:00
47 lines
1.5 KiB
NASM
47 lines
1.5 KiB
NASM
|
DOSCALL SEGMENT 'CODE'
|
|||
|
|
ASSUME CS:DOSCALL,DS:DOSCALL
|
|||
|
|
;
|
|||
|
|
;Procedure DOSVIO(VAR: AX, BX, CX, DX: Word);
|
|||
|
|
;
|
|||
|
|
; Issue a DOS VIDEO I/O INT (10) with register values set by caller
|
|||
|
|
;
|
|||
|
|
; FRAME: ADR AX; 12
|
|||
|
|
; ADR BX; 10
|
|||
|
|
; ADR CX; 08
|
|||
|
|
; ADR DX; 06
|
|||
|
|
; <RET BP>; 00
|
|||
|
|
;
|
|||
|
|
PUBLIC DOSVIO
|
|||
|
|
DOSVIO PROC FAR
|
|||
|
|
PUSH BP ;Save current BP value
|
|||
|
|
MOV BP,SP ;To address parms
|
|||
|
|
MOV DI,[BP+12] ;Address of AX
|
|||
|
|
MOV AX,[DI] ;Set AX value
|
|||
|
|
MOV DI,[BP+10] ;Address of BX
|
|||
|
|
MOV BX,[DI] ;Set BX value
|
|||
|
|
MOV DI,[BP+08] ;Address of CX
|
|||
|
|
MOV CX,[DI] ;Set CX value
|
|||
|
|
MOV DI,[BP+06] ;Address of DX
|
|||
|
|
MOV DX,[DI] ;Set DX value
|
|||
|
|
|
|||
|
|
INT 10H ;Call BIOS with caller's AX, BX, CX, DX
|
|||
|
|
|
|||
|
|
MOV DI,[BP+12] ;Now put them all back...
|
|||
|
|
MOV [DI],AX
|
|||
|
|
MOV DI,[BP+10]
|
|||
|
|
MOV [DI],BX
|
|||
|
|
MOV DI,[BP+08]
|
|||
|
|
MOV [DI],CX
|
|||
|
|
MOV DI,[BP+06]
|
|||
|
|
MOV [DI],DX
|
|||
|
|
|
|||
|
|
POP BP ;Restore frame pointer
|
|||
|
|
RET 6 ;Return, poping 6 bytes
|
|||
|
|
|
|||
|
|
DOSVIO ENDP
|
|||
|
|
|
|||
|
|
DOSCALL ENDS
|
|||
|
|
END
|
|||
|
|
|
|||
|
|
*** CREATED 06/28/82 21:05:48 BY AMD ***
|
|||
|
|
|