71 lines
1.7 KiB
NASM
71 lines
1.7 KiB
NASM
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; Copyright (c) Mix Software 1988
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;
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; -------------------------------------------------------
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; int intr(intno, reg);
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; int intno;
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; union REGPACK reg;
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; -------------------------------------------------------
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;
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IDT intr
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DEF intr
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;
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intr PUSH BP
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MOV BP,SP
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SUB SP,INSTRSZ
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MOV SI,INSTRINT
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MOV DI,SP
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MOV AX,SS
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MOV ES,AX
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MOV CX,INSTRSZ
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CLD
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REP
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MOVSB
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MOV BX,SP
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MOV AX,[BP][%PARM1]
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MOV [BX][%1],AL
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MOV BP,[BP][%PARM2]
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PUSH BP
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MOV AX,CS
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PUSH AX ; Return segment
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CALL DOINT
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PUSH DS
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PUSH BP
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MOV BP,SS
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MOV DS,BP
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MOV BP,SP
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MOV BP,[BP][%4]
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MOV [BP][%0],AX
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MOV [BP][%2],BX
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MOV [BP][%4],CX
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MOV [BP][%6],DX
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POP [BP][%8]
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MOV [BP][%10],SI
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MOV [BP][%12],DI
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POP [BP][%14]
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MOV [BP][%16],ES
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PUSHF
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POP [BP][%18]
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ADD SP,%INSTRSZ+2
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POP BP
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RETFAR
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;
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DOINT MOV AX,SS
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PUSH AX ; Segment of int xx instruction
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PUSH BX ; offset of int xx instruction
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MOV AX,[BP][%0]
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MOV BX,[BP][%2]
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MOV CX,[BP][%4]
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MOV DX,[BP][%6]
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MOV SI,[BP][%10]
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MOV DI,[BP][%12]
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MOV DS,[BP][%14]
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MOV ES,[BP][%16]
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MOV BP,[BP][%8]
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RETFAR
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DORG 0
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INSTRINT INT >21
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INSTRRET RETSEG
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INSTRSZ EQU (($-INSTRINT)+1)|>FFFE
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END
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