76 lines
1.9 KiB
NASM
76 lines
1.9 KiB
NASM
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; Copyright (c) Mix Software 1988
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;
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; -------------------------------------------------------
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; peek(segment, offset) - read a word from memory
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; unsigned segment;
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; unsigned offset;
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; -------------------------------------------------------
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;
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IDT peek
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DEF peek
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;
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peek MOV BX,SP
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MOV ES,[BX][%PARM1-2]
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MOV SI,[BX][%PARM2-2]
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SEGES
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MOV AX,[SI]
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RETSEG
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END
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;
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; -------------------------------------------------------
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; peekb(segment, offset) - read a byte from memory
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; unsigned segment;
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; unsigned offset;
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; -------------------------------------------------------
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;
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IDT peekb
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DEF peekb
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;
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peekb MOV BX,SP
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MOV ES,[BX][%PARM1-2]
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MOV SI,[BX][%PARM2-2]
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SEGES
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MOV AL,[SI]
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XOR AH,AH
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RETSEG
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END
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;
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; -------------------------------------------------------
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; poke(segment, offset, value) - store a word
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; unsigned segment;
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; unsigned offset;
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; int value;
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; -------------------------------------------------------
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;
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IDT poke
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DEF poke
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;
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poke MOV BX,SP
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MOV ES,[BX][%PARM1-2]
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MOV SI,[BX][%PARM2-2]
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MOV AX,[BX][%PARM3-2]
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SEGES
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MOV [SI],AX
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RETSEG
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END
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;
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; -------------------------------------------------------
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; pokeb(segment, offset, value) - store a byte
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; unsigned segment;
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; unsigned offset;
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; int value;
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; -------------------------------------------------------
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;
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IDT pokeb
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DEF pokeb
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;
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pokeb MOV BX,SP
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MOV ES,[BX][%PARM1-2]
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MOV SI,[BX][%PARM2-2]
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MOV AL,[BX][%PARM3-2]
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SEGES
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MOV [SI],AL
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RETSEG
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END
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