mirror of https://github.com/nmlgc/ReC98.git
108 lines
1.8 KiB
NASM
108 lines
1.8 KiB
NASM
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; master library - BGM
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;
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; Description:
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;
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;
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; Function/Procedures:
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; void _bgm_timer_init(void);
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; void _bgm_timer_finish(void);
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;
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; Parameters:
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; none
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;
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; Returns:
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; none
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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, PC/AT
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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_timer.asm / master.lib 0.22 <- bgmlibs.lib 1.12
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; 95/ 2/23 [M0.22k] RTC割り込みマネージャrtc_int_set使用
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RTC_SLOT_BGM equ 0 ; BGM RTC割り込みスロット番号
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func _BGM_TIMER_INIT ; _bgm_timer_init() {
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test Machine_State,10h ; PC/AT
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jnz short @@INIT_PCAT
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;マスクレジスタ保存
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in AL,IMR
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mov AH,0
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mov glb.simr,AX
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CLI
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;割り込みベクタの保存&書き換え
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push 8
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push seg _BGM_TIMERHOOK
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push offset _BGM_TIMERHOOK
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nopcall DOS_SETVECT
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mov word ptr timerorg+2,DX
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mov word ptr timerorg,AX
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;タイマインタラプト初期設定
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mov AL,36h
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out TIMER_SET,AL ; 98
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mov AX,glb.tval
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out TIMER_CNT,AL ; 98
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mov AL,AH
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out TIMER_CNT,AL ; 98
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;マスク解除
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mov AL,byte ptr glb.simr
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and AL,not TIMERMASK
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out IMR,AL ; 98
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STI
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ret
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@@INIT_PCAT:
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mov AX,offset _BGM_TIMERHOOK
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mov BX,RTC_SLOT_BGM
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call rtc_int_set
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ret
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endfunc ; }
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func _BGM_TIMER_FINISH ; _bgm_timer_finish() {
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CLI
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test Machine_State,10h ; PC/AT
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jnz short @@FIN_PCAT
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;割り込みベクタを元に戻す
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push 8
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push word ptr timerorg+2
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push word ptr timerorg
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nopcall DOS_SETVECT
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;マスクレジスタを元に戻す
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mov AL,byte ptr glb.simr
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out IMR,AL ; 98
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STI
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ret
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@@FIN_PCAT:
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mov AX,0
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mov BX,RTC_SLOT_BGM
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call rtc_int_set
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ret
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endfunc ; }
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