mirror of https://github.com/nmlgc/ReC98.git
89 lines
1.2 KiB
NASM
89 lines
1.2 KiB
NASM
; master library - PC-9801 - ASM
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;
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; Description:
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; サウンドボードのレジスタ設定／読み込み
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;
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; Function/Procedures:
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;
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;
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; Subroutines:
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; SOUND_I:near
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; SOUND_O:near
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;
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; Parameters:
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; SOUND_O: BH = reg number
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; BL = value
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; SOUND_I: BH = reg number
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; SOUND_JOY: BL = port 0fhにセットするデータ
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;
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; Break Registers:
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; AL,DX, BH(SOUND_JOY)
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;
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; Returns:
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; SOUND_I: AL = read value
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; SOUND_JOY: AL = port 0eh から読み込んだ値の反転
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;
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; Binding Target:
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; asm
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;
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; Running Target:
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; PC-9801
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;
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; Requiring Resources:
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; CPU: 8086
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;
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; Notes:
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; サウンドドライバとの競合を避けるため、割り込み禁止状態で呼び出して
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; 下さい。
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;
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; Assembly Language Note:
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;
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;
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; Compiler/Assembler:
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; TASM 3.0
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; OPTASM 1.6
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;
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; Author:
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; 恋塚昭彦
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;
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; Revision History:
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; 93/ 5/ 2 Initial:soundio.asm/master.lib 0.16
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WAITREADY macro
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local LO
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LO:
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in AL,DX
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test AL,80h
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jnz short LO
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endm
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SOUND_O proc near
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mov DX,188h
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WAITREADY
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mov AL,BH
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out DX,AL
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WAITREADY
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inc DX
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inc DX
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mov AL,BL
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out DX,AL
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ret
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SOUND_O endp
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SOUND_I proc near
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mov DX,188h
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WAITREADY
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mov AL,BH
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out DX,AL
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WAITREADY
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inc DX
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inc DX
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in AL,DX
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ret
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SOUND_I endp
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