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1 nishi 1 
/* $Id: shiroi.c 12 2024-08-29 04:19:08Z nishi $ */
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#include "shiroi.h"
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#include "card/shiroi_video_mk_i.h"
7 nishi 6 
#include "card/shiroi_video_mk_ii.h"
1 nishi 7 
#include "card/shiroi_sound_mk_i.h"
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#include "card/shiroi_math_mk_i.h"
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#include "card/shiroi_text_mk_i.h"
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#include "card/shiroi_debug.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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#include <time.h>
1 nishi 16 
 
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float audio[480];
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int16_t incre = 0;
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20 
void shiroi_play_audio(void* buffer, unsigned int frames) {
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	int16_t* d = (int16_t*)buffer;
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	int i;
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	for(i = 0; i < frames; i++) {
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		d[i] = audio[(i + incre >= 480) ? (i + incre - 480) : (i + incre)] * 32767;
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	}
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}
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shiroi_card_t* shiroi_get_video_card(shiroi_t* shiroi) {
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	int i;
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	for(i = 0; i < 256 / SHIROI_IO_PORTS; i++) {
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		if(shiroi->cards[i].type == 0) continue;
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		if((shiroi->cards[i].type & 0xf0) == SHIROI_VIDEO) return &shiroi->cards[i];
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	}
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	return NULL;
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}
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shiroi_card_t* shiroi_get_sound_card(shiroi_t* shiroi) {
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	int i;
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	for(i = 0; i < 256 / SHIROI_IO_PORTS; i++) {
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		if(shiroi->cards[i].type == 0) continue;
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		if((shiroi->cards[i].type & 0xf0) == SHIROI_SOUND) return &shiroi->cards[i];
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	}
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	return NULL;
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}
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shiroi_card_t* shiroi_get_math_card(shiroi_t* shiroi) {
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	int i;
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	for(i = 0; i < 256 / SHIROI_IO_PORTS; i++) {
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		if(shiroi->cards[i].type == 0) continue;
3 nishi 50 
		if(shiroi->cards[i].type == SHIROI_MATH_MARK_I) return &shiroi->cards[i];
1 nishi 51 
	}
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	return NULL;
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}
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3 nishi 55 
shiroi_card_t* shiroi_get_text_card(shiroi_t* shiroi) {
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	int i;
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	for(i = 0; i < 256 / SHIROI_IO_PORTS; i++) {
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		if(shiroi->cards[i].type == 0) continue;
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		if(shiroi->cards[i].type == SHIROI_TEXT_MARK_I) return &shiroi->cards[i];
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	}
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	return NULL;
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}
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12 nishi 64 
shiroi_card_t* shiroi_get_debug_card(shiroi_t* shiroi) {
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	int i;
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	for(i = 0; i < 256 / SHIROI_IO_PORTS; i++) {
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		if(shiroi->cards[i].type == 0) continue;
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		if(shiroi->cards[i].type == SHIROI_DEBUG) return &shiroi->cards[i];
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	}
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	return NULL;
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}
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1 nishi 73 
void shiroi_init_cards(shiroi_t* shiroi) {
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	int i;
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	for(i = 0; i < 256 / SHIROI_IO_PORTS; i++) {
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		shiroi->cards[i].type = 0;
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	}
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}
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void shiroi_install(shiroi_t* shiroi, int slot, int card) {
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	if(card == SHIROI_VIDEO_MARK_I) {
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		shiroi_video_mk_i_install(shiroi, slot);
7 nishi 83 
	} else if(card == SHIROI_VIDEO_MARK_II) {
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		shiroi_video_mk_ii_install(shiroi, slot);
1 nishi 85 
	} else if(card == SHIROI_SOUND_MARK_I) {
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		shiroi_sound_mk_i_install(shiroi, slot);
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	} else if(card == SHIROI_MATH_MARK_I) {
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		shiroi_math_mk_i_install(shiroi, slot);
3 nishi 89 
	} else if(card == SHIROI_TEXT_MARK_I) {
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		shiroi_text_mk_i_install(shiroi, slot);
12 nishi 91 
	} else if(card == SHIROI_DEBUG) {
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		shiroi_debug_install(shiroi, slot);
1 nishi 93 
	}
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}
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10 nishi 96 
void shiroi_reset_card(shiroi_t* shiroi, int slot) {
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	int card = shiroi->cards[slot].type;
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	if(card == 0) {
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	} else if(card == SHIROI_VIDEO_MARK_I) {
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		shiroi_video_mk_i_reset(shiroi, slot);
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	} else if(card == SHIROI_VIDEO_MARK_II) {
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		shiroi_video_mk_ii_reset(shiroi, slot);
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	} else if(card == SHIROI_SOUND_MARK_I) {
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		shiroi_sound_mk_i_reset(shiroi, slot);
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	} else if(card == SHIROI_MATH_MARK_I) {
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		shiroi_math_mk_i_reset(shiroi, slot);
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	} else if(card == SHIROI_TEXT_MARK_I) {
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		shiroi_text_mk_i_reset(shiroi, slot);
12 nishi 109 
	} else if(card == SHIROI_DEBUG) {
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		shiroi_debug_reset(shiroi, slot);
10 nishi 111 
	}
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}
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1 nishi 114 
void shiroi_init(shiroi_t* shiroi) {
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	shiroi->z80_pins = z80_init(&shiroi->z80);
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	shiroi->stop = false;
10 nishi 117 
	shiroi->reset = false;
1 nishi 118 
	shiroi->play_audio = shiroi_play_audio;
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120 
	int i;
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122 
	for(i = 0; i < 480; i++) {
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		audio[i] = 0;
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	}
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}
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127 
void shiroi_loop(shiroi_t* shiroi) {
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	int x = 0;
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	int y = 0;
12 nishi 130 
#ifdef ACCURATE_CLOCK
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	double hz = 1000000000 / (20 * 1024 * 1024);
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	struct timespec deadline;
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#endif
11 nishi 134 
	while(!shiroi->stop || shiroi->reset) {
10 nishi 135 
		if(shiroi->reset) {
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			z80_reset(&shiroi->z80);
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			int i;
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			for(i = 0; i < 256 / SHIROI_IO_PORTS; i++) {
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				shiroi_reset_card(shiroi, i);
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			}
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			shiroi->reset = false;
11 nishi 142 
			incre = 0;
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			for(i = 0; i < 480; i++) audio[i] = 0;
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			continue;
10 nishi 145 
		}
12 nishi 146 
#ifdef ACCURATE_CLOCK
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		clock_gettime(CLOCK_MONOTONIC, &deadline);
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		deadline.tv_nsec += hz;
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		if(deadline.tv_nsec >= 1000000000) {
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			deadline.tv_nsec -= 1000000000;
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			deadline.tv_sec++;
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		}
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#endif
1 nishi 154 
		shiroi->z80_pins = z80_tick(&shiroi->z80, shiroi->z80_pins);
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		if(shiroi->z80_pins & Z80_MREQ) {
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			uint16_t addr = Z80_GET_ADDR(shiroi->z80_pins);
157 
			if(shiroi->z80_pins & Z80_RD) {
158 
				uint8_t data = shiroi->ram[addr];
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				Z80_SET_DATA(shiroi->z80_pins, data);
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			} else if(shiroi->z80_pins & Z80_WR) {
3 nishi 161 
				if(addr >= 0x8000) {
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					uint8_t data = Z80_GET_DATA(shiroi->z80_pins);
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					shiroi->ram[addr] = data;
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				}
1 nishi 165 
			}
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		} else if(shiroi->z80_pins & Z80_IORQ) {
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			uint16_t io = Z80_GET_ADDR(shiroi->z80_pins);
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			uint16_t addr = io & 0xff;
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			uint16_t data = (io >> 8) & 0xff;
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171 
			if(shiroi->z80_pins & Z80_M1) {
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			} else {
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				shiroi_video_mk_i(shiroi);
7 nishi 174 
				shiroi_video_mk_ii(shiroi);
1 nishi 175 
				shiroi_sound_mk_i(shiroi);
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				shiroi_math_mk_i(shiroi);
3 nishi 177 
				shiroi_text_mk_i(shiroi);
12 nishi 178 
				shiroi_debug(shiroi);
1 nishi 179 
			}
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		}
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182 
		shiroi_video_mk_i_tick(shiroi);
7 nishi 183 
		shiroi_video_mk_ii_tick(shiroi);
1 nishi 184 
		shiroi_sound_mk_i_tick(shiroi);
185 
		shiroi_math_mk_i_tick(shiroi);
3 nishi 186 
		shiroi_text_mk_i_tick(shiroi);
12 nishi 187 
		shiroi_debug_tick(shiroi);
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#ifdef ACCURATE_CLOCK
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		clock_nanosleep(CLOCK_MONOTONIC, TIMER_ABSTIME, &deadline, NULL);
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#endif
1 nishi 191 
	}
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}