Subversion Repositories Shiroi

/* $Id: shiroi_sound_mk_i.c 1 2024-08-28 08:10:28Z nishi $ */
#include "shiroi_sound_mk_i.h"

#include "shiroi.h"

extern float audio[];
extern int16_t incre;

void shiroi_sound_mk_i_install(shiroi_t* shiroi, int slot) {
        shiroi->cards[slot].type = SHIROI_SOUND_MARK_I;
        shiroi->cards[slot].soundptr = &shiroi->cards[slot].sound;

        ay38910_desc_t desc;
        desc.tick_hz = 3 * 1024 * 1024;
        desc.sound_hz = 48000;
        desc.magnitude = 0.5;
        desc.user_data = NULL;
        desc.in_cb = NULL;
        desc.out_cb = NULL;
        desc.type = AY38910_TYPE_8910;

        ay38910_init(&shiroi->cards[slot].sound.psg, &desc);
}

void shiroi_sound_mk_i(shiroi_t* shiroi) {
        int i;

        uint16_t io = Z80_GET_ADDR(shiroi->z80_pins);
        uint16_t addr = io & 0xff;
        uint16_t data = (io >> 8) & 0xff;

        for(i = 0; i < 256 / SHIROI_IO_PORTS; i++) {
                if(shiroi->cards[i].type == SHIROI_SOUND_MARK_I) {
                        if(shiroi->z80_pins & Z80_RD) {
                                /* I/O Read */
                                if(addr == 5) {
                                        Z80_SET_DATA(shiroi->z80_pins, shiroi->cards[i].type);
                                }
                        } else if(shiroi->z80_pins & Z80_WR) {
                                /* I/O Write */
                                if(addr == 3) {
                                        uint64_t pins;
                                        pins = AY38910_BDIR | AY38910_BC1;
                                        AY38910_SET_DATA(pins, data);
                                        ay38910_iorq(&shiroi->cards[i].sound.psg, pins);
                                } else if(addr == 4) {
                                        uint64_t pins;
                                        pins = AY38910_BDIR;
                                        AY38910_SET_DATA(pins, data);
                                        ay38910_iorq(&shiroi->cards[i].sound.psg, pins);
                                }
                        }
                }
        }
}

void shiroi_sound_mk_i_tick(shiroi_t* shiroi) {
        int i;
        for(i = 0; i < 256 / SHIROI_IO_PORTS; i++) {
                if(shiroi->cards[i].type == SHIROI_SOUND_MARK_I) {
                        if(ay38910_tick(&shiroi->cards[i].sound.psg)) {
                                audio[incre++] = shiroi->cards[i].sound.psg.sample;
                                if(incre == 480) incre = 0;
                        }
                }
        }
}