mirror of https://github.com/nmlgc/ReC98.git
67 lines
1.0 KiB
NASM
67 lines
1.0 KiB
NASM
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; master library - BGM
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;
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; Description:
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; テンポを変更する
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;
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; Function/Procedures:
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; int bgm_set_tempo(int tempo);
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;
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; Parameters:
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; tempo 設定するテンポ
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;
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; Returns:
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; BGM_COMPLETE 正常終了
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; BGM_EXTENT_ERR テンポの値が異常
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;
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; Binding Target:
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; Microsoft-C / Turbo-C / Turbo Pascal
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;
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; Running Target:
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; PC-9801V
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;
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; Requiring Resources:
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; CPU: V30
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;
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; Notes:
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;
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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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; femy(淀 文武) : オリジナル・C言語版
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; steelman(千野 裕司) : アセンブリ言語版
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;
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; Revision History:
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; 93/12/19 Initial: b_s_temp.asm / master.lib 0.22 <- bgmlibs.lib 1.12
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func BGM_SET_TEMPO
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mov BX,SP
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tempo = (RETSIZE+0)*2
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mov CX,SS:[BX+tempo]
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cmp CX,TEMPOMIN
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jl short @@ILLEGAL
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cmp CX,TEMPOMAX
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jg short @@ILLEGAL
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CLI
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mov glb.tp,CX
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mov AX,word ptr glb.clockbase
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mov DX,word ptr glb.clockbase+2
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div CX
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mov glb.tval,AX
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STI
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xor AX,AX ; BGM_COMPLETE
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ret 2
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@@ILLEGAL:
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mov AX,BGM_EXTENT_ERR
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ret 2
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endfunc
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