164 lines
4.6 KiB
C
164 lines
4.6 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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* Roland MPU-401 emulation.
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*
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*
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*
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* Author: Sarah Walker, <http://pcem-emulator.co.uk/>
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* DOSBox Team,
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* Miran Grca, <mgrca8@gmail.com>
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* TheCollector1995, <mariogplayer@gmail.com>
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* Copyright 2008-2020 Sarah Walker.
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* Copyright 2008-2020 DOSBox Team.
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* Copyright 2016-2020 Miran Grca.
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* Copyright 2016-2020 TheCollector1995.
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*/
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#ifndef SOUND_MPU401_H
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#define SOUND_MPU401_H
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#define MPU401_VERSION 0x15
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#define MPU401_REVISION 0x01
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#define MPU401_QUEUE 64
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#define MPU401_INPUT_QUEUE 1024
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#define MPU401_TIMECONSTANT (60000000 / 1000.0f)
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#define MPU401_RESETBUSY 27.0f
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/*helpers*/
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#define M_GETKEY key[key / 32] & (1 << (key % 32))
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#define M_SETKEY key[key / 32] |= (1 << (key % 32))
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#define M_DELKEY key[key / 32] &= ~(1 << (key % 32))
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typedef enum MpuMode {
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M_UART,
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M_INTELLIGENT
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} MpuMode;
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#define M_MCA 0x10
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typedef enum MpuDataType {
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T_OVERFLOW,
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T_MARK,
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T_MIDI_SYS,
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T_MIDI_NORM,
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T_COMMAND
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} MpuDataType;
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typedef enum RecState {
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M_RECOFF,
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M_RECSTB,
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M_RECON
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} RecState;
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/* Messages sent to MPU-401 from host */
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#define MSG_EOX 0xf7
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#define MSG_OVERFLOW 0xf8
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#define MSG_MARK 0xfc
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/* Messages sent to host from MPU-401 */
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#define MSG_MPU_OVERFLOW 0xf8
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#define MSG_MPU_COMMAND_REQ 0xf9
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#define MSG_MPU_END 0xfc
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#define MSG_MPU_CLOCK 0xfd
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#define MSG_MPU_ACK 0xfe
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typedef struct mpu_t {
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uint16_t addr;
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int uart_mode, intelligent,
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irq, midi_thru,
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queue_pos, queue_used;
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uint8_t rx_data, is_mca,
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status,
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queue[MPU401_QUEUE], pos_regs[8];
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MpuMode mode;
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uint8_t rec_queue[MPU401_INPUT_QUEUE];
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int rec_queue_pos, rec_queue_used;
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uint32_t ch_toref[16];
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struct track {
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int counter;
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uint8_t value[3], sys_val,
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vlength, length;
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MpuDataType type;
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} playbuf[8], condbuf;
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struct {
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int conductor, cond_req,
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cond_set, block_ack,
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playing, reset,
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wsd, wsm, wsd_start,
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run_irq, irq_pending,
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track_req,
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send_now, eoi_scheduled,
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data_onoff, clock_to_host,
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sync_in, sysex_in_finished,
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rec_copy;
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RecState rec;
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uint8_t tmask, cmask,
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amask,
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last_rtcmd;
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uint16_t midi_mask, req_mask;
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uint32_t command_byte, cmd_pending,
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track, old_track;
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} state;
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struct {
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uint8_t timebase, old_timebase,
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tempo, old_tempo,
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tempo_rel, old_tempo_rel,
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tempo_grad, cth_rate[4],
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cth_mode, midimetro,
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metromeas;
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uint32_t cth_counter, cth_old,
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rec_counter;
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int32_t measure_counter, meas_old,
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freq;
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int ticks_in, active;
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float freq_mod;
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} clock;
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struct {
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int all_thru, midi_thru,
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sysex_thru, commonmsgs_thru,
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modemsgs_in, commonmsgs_in,
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bender_in, sysex_in,
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allnotesoff_out, rt_affection,
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rt_out, rt_in,
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timing_in_stop, data_in_stop,
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rec_measure_end;
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uint8_t prchg_buf[16];
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uint16_t prchg_mask;
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} filter;
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struct {
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int on;
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uint8_t chan, trmask;
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uint32_t key[4];
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} chanref[5], inputref[16];
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pc_timer_t mpu401_event_callback, mpu401_eoi_callback,
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mpu401_reset_callback;
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void (*ext_irq_update)(void *priv, int set);
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int (*ext_irq_pending)(void *priv);
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void *priv;
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} mpu_t;
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extern int mpu401_standalone_enable, mpu401_already_loaded;
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extern const device_t mpu401_device;
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extern const device_t mpu401_mca_device;
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extern uint8_t MPU401_ReadData(mpu_t *mpu);
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extern void mpu401_write(uint16_t addr, uint8_t val, void *priv);
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extern uint8_t mpu401_read(uint16_t addr, void *priv);
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extern void mpu401_setirq(mpu_t *mpu, int irq);
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extern void mpu401_change_addr(mpu_t *mpu, uint16_t addr);
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extern void mpu401_init(mpu_t *mpu, uint16_t addr, int irq, int mode, int receive_input);
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extern void mpu401_device_add(void);
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extern void mpu401_irq_attach(mpu_t *mpu, void (*ext_irq_update)(void *priv, int set), int (*ext_irq_pending)(void *priv), void *priv);
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extern int MPU401_InputSysex(void *p, uint8_t *buffer, uint32_t len, int abort);
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extern void MPU401_InputMsg(void *p, uint8_t *msg, uint32_t len);
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#endif /*SOUND_MPU401_H*/
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