58 lines
1.4 KiB
C
58 lines
1.4 KiB
C
/*
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* 86Box A hypervisor and IBM PC system emulator that specializes in
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* running old operating systems and software designed for IBM
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* PC systems and compatibles from 1981 through fairly recent
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* system designs based on the PCI bus.
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*
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* This file is part of the 86Box distribution.
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*
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* Definitions for the OPL interface.
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*
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* Authors: Fred N. van Kempen, <decwiz@yahoo.com>
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* Miran Grca, <mgrca8@gmail.com>
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*
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* Copyright 2017-2020 Fred N. van Kempen.
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* Copyright 2016-2020 Miran Grca.
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*/
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#ifndef SOUND_OPL_H
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# define SOUND_OPL_H
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typedef void (*tmrfunc)(void *priv, int timer, uint64_t period);
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/* Define an OPLx chip. */
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typedef struct {
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#ifdef SOUND_OPL_NUKED_H
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nuked_t *opl;
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#else
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void *opl;
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#endif
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int8_t flags, pad;
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uint16_t port;
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uint8_t status, timer_ctrl;
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uint16_t timer_count[2],
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timer_cur_count[2];
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pc_timer_t timers[2];
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int pos;
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int32_t buffer[SOUNDBUFLEN * 2];
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} opl_t;
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extern void opl_set_do_cycles(opl_t *dev, int8_t do_cycles);
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extern uint8_t opl2_read(uint16_t port, void *);
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extern void opl2_write(uint16_t port, uint8_t val, void *);
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extern void opl2_init(opl_t *);
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extern void opl2_update(opl_t *);
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extern uint8_t opl3_read(uint16_t port, void *);
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extern void opl3_write(uint16_t port, uint8_t val, void *);
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extern void opl3_init(opl_t *);
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extern void opl3_update(opl_t *);
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#endif /*SOUND_OPL_H*/
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