49 lines
1.1 KiB
NASM
49 lines
1.1 KiB
NASM
;
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; Copyright (c) Mix Software 1988
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;
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; -------------------------------------------------------
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; getvect - get interrupt vector
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; return contents of interrupt vector
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; -------------------------------------------------------
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;
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IDT getvect
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DEF getvect
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;
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getvect PUSH BP
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MOV BP,SP
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MOV AL,[BP][%PARM1]
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MOV AH,>35
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INT >21
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MOV DX,ES
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MOV AX,BX
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POP BP
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RETSEG
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END
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;
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; -------------------------------------------------------
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; setvect - set interrupt vector
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; void setvect(int intno, void (*fn)())
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; -------------------------------------------------------
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;
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IDT setvect
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DEF setvect
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;
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setvect PUSH BP
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MOV BP,SP
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PUSH DS
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MOV AL,[BP][%PARM1]
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; if near pointer
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; MOV BX,[BP][%PARM2]
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; MOV DX,[BX]
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; MOV DS,[BX][%2]
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; if far pointer
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MOV DX,[BP][%PARM2]
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MOV DS,[BP][%PARM3]
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MOV AH,>25
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INT >21
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POP AX
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MOV DS,AX
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POP BP
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RETSEG
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END
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