601 lines
28 KiB
C
601 lines
28 KiB
C
#include <stdlib.h>
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#include <string.h>
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#include "ibm.h"
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#include "device.h"
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#include "sound_opl.h"
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#include "dma.h"
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#include "io.h"
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#include "pic.h"
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#include "pit.h"
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#include "timer.h"
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void adgold_timer_poll();
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typedef struct adgold_t
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{
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int adgold_irq_status;
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uint8_t adgold_eeprom[0x19];
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uint8_t adgold_status;
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int adgold_38x_state, adgold_38x_addr;
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uint8_t adgold_38x_regs[0x19];
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int adgold_mma_addr;
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uint8_t adgold_mma_regs[2][0xe];
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int adgold_mma_enable[2];
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uint8_t adgold_mma_fifo[2][256];
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int adgold_mma_fifo_start[2], adgold_mma_fifo_end[2];
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uint8_t adgold_mma_status;
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int16_t adgold_mma_out[2];
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int adgold_mma_intpos[2];
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int adgold_mma_timer_count;
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struct
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{
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int timer0_latch, timer0_count;
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int timerbase_latch, timerbase_count;
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int timer1_latch, timer1_count;
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int timer2_latch, timer2_count, timer2_read;
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int voice_count[2], voice_latch[2];
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} adgold_mma;
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opl_t opl;
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int16_t opl_buffer[SOUNDBUFLEN * 2];
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int16_t mma_buffer[2][SOUNDBUFLEN];
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int pos;
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} adgold_t;
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void adgold_update_irq_status(adgold_t *adgold)
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{
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uint8_t temp = 0xf;
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if (!(adgold->adgold_mma_regs[0][8] & 0x10) && (adgold->adgold_mma_status & 0x10)) /*Timer 0*/
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temp &= ~2;
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if (!(adgold->adgold_mma_regs[0][8] & 0x20) && (adgold->adgold_mma_status & 0x20)) /*Timer 1*/
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temp &= ~2;
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if (!(adgold->adgold_mma_regs[0][8] & 0x40) && (adgold->adgold_mma_status & 0x40)) /*Timer 2*/
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temp &= ~2;
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if ((adgold->adgold_mma_status & 0x01) && !(adgold->adgold_mma_regs[0][0xc] & 2))
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temp &= ~2;
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if ((adgold->adgold_mma_status & 0x02) && !(adgold->adgold_mma_regs[1][0xc] & 2))
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temp &= ~2;
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adgold->adgold_status = temp;
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if ((adgold->adgold_status ^ 0xf) && !adgold->adgold_irq_status)
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{
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pclog("adgold irq %02X\n", adgold->adgold_status);
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picint(0x80);
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}
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adgold->adgold_irq_status = adgold->adgold_status ^ 0xf;
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}
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void adgold_getsamp_dma(adgold_t *adgold, int channel)
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{
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int temp;
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if ((adgold->adgold_mma_regs[channel][0xc] & 0x60) && (((adgold->adgold_mma_fifo_end[channel] - adgold->adgold_mma_fifo_start[channel]) & 255) >= 127))
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return;
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temp = dma_channel_read(1);
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// pclog("adgold DMA1 return %02X %i L\n", temp, channel);
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if (temp == DMA_NODATA) return;
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adgold->adgold_mma_fifo[channel][adgold->adgold_mma_fifo_end[channel]] = temp;
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adgold->adgold_mma_fifo_end[channel] = (adgold->adgold_mma_fifo_end[channel] + 1) & 255;
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if (adgold->adgold_mma_regs[channel][0xc] & 0x60)
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{
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temp = dma_channel_read(1);
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// pclog("adgold DMA1 return %02X %i H\n", temp, channel);
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adgold->adgold_mma_fifo[channel][adgold->adgold_mma_fifo_end[channel]] = temp;
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adgold->adgold_mma_fifo_end[channel] = (adgold->adgold_mma_fifo_end[channel] + 1) & 255;
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}
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if (((adgold->adgold_mma_fifo_end[channel] - adgold->adgold_mma_fifo_start[channel]) & 255) >= adgold->adgold_mma_intpos[channel])
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{
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adgold->adgold_mma_status &= ~(0x01 << channel);
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adgold_update_irq_status(adgold);
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}
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}
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void adgold_write(uint16_t addr, uint8_t val, void *p)
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{
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adgold_t *adgold = (adgold_t *)p;
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if (addr > 0x389) pclog("adgold_write : addr %04X val %02X %04X:%04X\n", addr, val, CS, pc);
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switch (addr & 7)
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{
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case 0: case 1:
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opl3_write(addr, val, &adgold->opl);
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break;
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case 2:
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if (val == 0xff)
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{
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adgold->adgold_38x_state = 1;
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return;
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}
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if (val == 0xfe)
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{
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adgold->adgold_38x_state = 0;
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return;
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}
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if (adgold->adgold_38x_state) /*Write to control chip*/
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adgold->adgold_38x_addr = val;
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else
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opl3_write(addr, val, &adgold->opl);
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break;
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case 3:
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if (adgold->adgold_38x_state)
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{
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if (adgold->adgold_38x_addr >= 0x19) break;
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switch (adgold->adgold_38x_addr)
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{
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case 0x00: /*Control/ID*/
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if (val & 1)
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memcpy(adgold->adgold_38x_regs, adgold->adgold_eeprom, 0x19);
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if (val & 2)
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memcpy(adgold->adgold_eeprom, adgold->adgold_38x_regs, 0x19);
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break;
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default:
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adgold->adgold_38x_regs[adgold->adgold_38x_addr] = val;
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break;
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}
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}
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else
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opl3_write(addr, val, &adgold->opl);
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break;
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case 4: case 6:
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adgold->adgold_mma_addr = val;
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break;
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case 5:
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if (adgold->adgold_mma_addr >= 0xf) break;
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switch (adgold->adgold_mma_addr)
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{
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case 0x2:
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adgold->adgold_mma.timer0_latch = (adgold->adgold_mma.timer0_latch & 0xff00) | val;
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break;
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case 0x3:
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adgold->adgold_mma.timer0_latch = (adgold->adgold_mma.timer0_latch & 0xff) | (val << 8);
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break;
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case 0x4:
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adgold->adgold_mma.timerbase_latch = (adgold->adgold_mma.timerbase_latch & 0xf00) | val;
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break;
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case 0x5:
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adgold->adgold_mma.timerbase_latch = (adgold->adgold_mma.timerbase_latch & 0xff) | ((val & 0xf) << 8);
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adgold->adgold_mma.timer1_latch = val >> 4;
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break;
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case 0x6:
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adgold->adgold_mma.timer2_latch = (adgold->adgold_mma.timer2_latch & 0xff00) | val;
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break;
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case 0x7:
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adgold->adgold_mma.timer2_latch = (adgold->adgold_mma.timer2_latch & 0xff) | (val << 8);
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break;
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case 0x8:
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if ((val & 1) && !(adgold->adgold_mma_regs[0][8] & 1)) /*Reload timer 0*/
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adgold->adgold_mma.timer0_count = adgold->adgold_mma.timer0_latch;
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if ((val & 2) && !(adgold->adgold_mma_regs[0][8] & 2)) /*Reload timer 1*/
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adgold->adgold_mma.timer1_count = adgold->adgold_mma.timer1_latch;
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if ((val & 4) && !(adgold->adgold_mma_regs[0][8] & 4)) /*Reload timer 2*/
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adgold->adgold_mma.timer2_count = adgold->adgold_mma.timer2_latch;
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if ((val & 8) && !(adgold->adgold_mma_regs[0][8] & 8)) /*Reload base timer*/
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adgold->adgold_mma.timerbase_count = adgold->adgold_mma.timerbase_latch;
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break;
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case 0x9:
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switch (val & 0x18)
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{
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case 0x00: adgold->adgold_mma.voice_latch[0] = 12; break; /*44100 Hz*/
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case 0x08: adgold->adgold_mma.voice_latch[0] = 24; break; /*22050 Hz*/
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case 0x10: adgold->adgold_mma.voice_latch[0] = 48; break; /*11025 Hz*/
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case 0x18: adgold->adgold_mma.voice_latch[0] = 72; break; /* 7350 Hz*/
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}
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if (val & 0x80)
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{
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adgold->adgold_mma_enable[0] = 0;
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adgold->adgold_mma_fifo_end[0] = adgold->adgold_mma_fifo_start[0] = 0;
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adgold->adgold_mma_status &= ~0x01;
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adgold_update_irq_status(adgold);
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}
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if ((val & 0x01)) /*Start playback*/
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{
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if (!(adgold->adgold_mma_regs[0][0x9] & 1))
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adgold->adgold_mma.voice_count[0] = adgold->adgold_mma.voice_latch[0];
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pclog("adgold start! FIFO fill %i %i %i %02X\n", (adgold->adgold_mma_fifo_end[0] - adgold->adgold_mma_fifo_start[0]) & 255, adgold->adgold_mma_fifo_end[0], adgold->adgold_mma_fifo_start[0], adgold->adgold_mma_regs[0][0xc]);
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if (adgold->adgold_mma_regs[0][0xc] & 1)
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{
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if (adgold->adgold_mma_regs[0][0xc] & 0x80)
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{
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// pclog("adgold start interleaved %i %i
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adgold->adgold_mma_enable[1] = 1;
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adgold->adgold_mma.voice_count[1] = adgold->adgold_mma.voice_latch[1];
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while (((adgold->adgold_mma_fifo_end[0] - adgold->adgold_mma_fifo_start[0]) & 255) < 128)
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{
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adgold_getsamp_dma(adgold, 0);
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adgold_getsamp_dma(adgold, 1);
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}
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if (((adgold->adgold_mma_fifo_end[0] - adgold->adgold_mma_fifo_start[0]) & 255) >= adgold->adgold_mma_intpos[0])
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{
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adgold->adgold_mma_status &= ~0x01;
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adgold_update_irq_status(adgold);
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}
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if (((adgold->adgold_mma_fifo_end[1] - adgold->adgold_mma_fifo_start[1]) & 255) >= adgold->adgold_mma_intpos[1])
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{
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adgold->adgold_mma_status &= ~0x02;
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adgold_update_irq_status(adgold);
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}
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}
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else
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{
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while (((adgold->adgold_mma_fifo_end[0] - adgold->adgold_mma_fifo_start[0]) & 255) < 128)
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{
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adgold_getsamp_dma(adgold, 0);
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}
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if (((adgold->adgold_mma_fifo_end[0] - adgold->adgold_mma_fifo_start[0]) & 255) >= adgold->adgold_mma_intpos[0])
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{
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adgold->adgold_mma_status &= ~0x01;
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adgold_update_irq_status(adgold);
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}
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}
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}
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pclog("adgold end\n");
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}
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adgold->adgold_mma_enable[0] = val & 0x01;
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break;
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case 0xb:
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if (((adgold->adgold_mma_fifo_end[0] - adgold->adgold_mma_fifo_start[0]) & 255) < 128)
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{
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adgold->adgold_mma_fifo[0][adgold->adgold_mma_fifo_end[0]] = val;
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adgold->adgold_mma_fifo_end[0] = (adgold->adgold_mma_fifo_end[0] + 1) & 255;
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if (((adgold->adgold_mma_fifo_end[0] - adgold->adgold_mma_fifo_start[0]) & 255) >= adgold->adgold_mma_intpos[0])
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{
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adgold->adgold_mma_status &= ~0x01;
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adgold_update_irq_status(adgold);
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}
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}
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break;
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case 0xc:
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adgold->adgold_mma_intpos[0] = (7 - ((val >> 2) & 7)) * 8;
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break;
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}
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adgold->adgold_mma_regs[0][adgold->adgold_mma_addr] = val;
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break;
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case 7:
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if (adgold->adgold_mma_addr >= 0xf) break;
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switch (adgold->adgold_mma_addr)
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{
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case 0x9:
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switch (val & 0x18)
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{
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case 0x00: adgold->adgold_mma.voice_latch[1] = 12; break; /*44100 Hz*/
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case 0x08: adgold->adgold_mma.voice_latch[1] = 24; break; /*22050 Hz*/
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case 0x10: adgold->adgold_mma.voice_latch[1] = 48; break; /*11025 Hz*/
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case 0x18: adgold->adgold_mma.voice_latch[1] = 72; break; /* 7350 Hz*/
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}
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if (val & 0x80)
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{
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adgold->adgold_mma_enable[1] = 0;
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adgold->adgold_mma_fifo_end[1] = adgold->adgold_mma_fifo_start[1] = 0;
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adgold->adgold_mma_status &= ~0x02;
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adgold_update_irq_status(adgold);
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}
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if ((val & 0x01)) /*Start playback*/
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{
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if (!(adgold->adgold_mma_regs[1][0x9] & 1))
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adgold->adgold_mma.voice_count[1] = adgold->adgold_mma.voice_latch[1];
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pclog("adgold start! FIFO fill %i %i %i %02X\n", (adgold->adgold_mma_fifo_end[1] - adgold->adgold_mma_fifo_start[1]) & 255, adgold->adgold_mma_fifo_end[1], adgold->adgold_mma_fifo_start[1], adgold->adgold_mma_regs[1][0xc]);
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if (adgold->adgold_mma_regs[1][0xc] & 1)
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{
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while (((adgold->adgold_mma_fifo_end[1] - adgold->adgold_mma_fifo_start[1]) & 255) < 128)
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{
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adgold_getsamp_dma(adgold, 1);
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}
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}
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pclog("adgold end\n");
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}
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adgold->adgold_mma_enable[1] = val & 0x01;
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break;
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case 0xb:
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if (((adgold->adgold_mma_fifo_end[1] - adgold->adgold_mma_fifo_start[1]) & 255) < 128)
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{
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adgold->adgold_mma_fifo[1][adgold->adgold_mma_fifo_end[1]] = val;
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adgold->adgold_mma_fifo_end[1] = (adgold->adgold_mma_fifo_end[1] + 1) & 255;
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if (((adgold->adgold_mma_fifo_end[1] - adgold->adgold_mma_fifo_start[1]) & 255) >= adgold->adgold_mma_intpos[1])
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{
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adgold->adgold_mma_status &= ~0x02;
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adgold_update_irq_status(adgold);
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}
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}
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break;
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case 0xc:
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adgold->adgold_mma_intpos[1] = (7 - ((val >> 2) & 7)) * 8;
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break;
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}
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adgold->adgold_mma_regs[1][adgold->adgold_mma_addr] = val;
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break;
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}
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}
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uint8_t adgold_read(uint16_t addr, void *p)
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{
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adgold_t *adgold = (adgold_t *)p;
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uint8_t temp;
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switch (addr & 7)
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{
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case 0: case 1:
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temp = opl3_read(addr, &adgold->opl);
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break;
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case 2:
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if (adgold->adgold_38x_state) /*Read from control chip*/
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temp = adgold->adgold_status;
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else
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temp = opl3_read(addr, &adgold->opl);
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break;
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case 3:
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if (adgold->adgold_38x_state)
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{
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if (adgold->adgold_38x_addr >= 0x19) temp = 0xff;
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switch (adgold->adgold_38x_addr)
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{
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case 0x00: /*Control/ID*/
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temp = 0x70; /*16-bit ISA, no telephone/surround/CD-ROM*/
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break;
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default:
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temp = adgold->adgold_38x_regs[adgold->adgold_38x_addr];
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}
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}
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else
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temp = opl3_read(addr, &adgold->opl);
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break;
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case 4: case 6:
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temp = adgold->adgold_mma_status;
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adgold->adgold_mma_status = 0; /*JUKEGOLD expects timer status flags to auto-clear*/
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adgold_update_irq_status(adgold);
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break;
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case 5:
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if (adgold->adgold_mma_addr >= 0xf) temp = 0xff;
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switch (adgold->adgold_mma_addr)
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{
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case 6: /*Timer 2 low*/
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adgold->adgold_mma.timer2_read = adgold->adgold_mma.timer2_count;
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temp = adgold->adgold_mma.timer2_read & 0xff;
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break;
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case 7: /*Timer 2 high*/
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temp = adgold->adgold_mma.timer2_read >> 8;
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break;
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default:
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temp = adgold->adgold_mma_regs[0][adgold->adgold_mma_addr];
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break;
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}
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break;
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case 7:
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if (adgold->adgold_mma_addr >= 0xf) temp = 0xff;
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temp = adgold->adgold_mma_regs[1][adgold->adgold_mma_addr];
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break;
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}
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if (addr > 0x389) pclog("adgold_read : addr %04X %02X\n", addr, temp);
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return temp;
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}
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void adgold_mma_poll(adgold_t *adgold, int channel)
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{
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int16_t dat;
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if (adgold->adgold_mma_fifo_start[channel] != adgold->adgold_mma_fifo_end[channel])
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{
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switch (adgold->adgold_mma_regs[channel][0xc] & 0x60)
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{
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case 0x00: /*8-bit*/
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dat = adgold->adgold_mma_fifo[channel][adgold->adgold_mma_fifo_start[channel]] * 256;
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adgold->adgold_mma_out[channel] = dat;
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adgold->adgold_mma_fifo_start[channel] = (adgold->adgold_mma_fifo_start[channel] + 1) & 255;
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break;
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case 0x40: /*12-bit sensible format*/
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if (((adgold->adgold_mma_fifo_end[channel] - adgold->adgold_mma_fifo_start[channel]) & 255) < 2)
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return;
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dat = adgold->adgold_mma_fifo[channel][adgold->adgold_mma_fifo_start[channel]] & 0xf0;
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adgold->adgold_mma_fifo_start[channel] = (adgold->adgold_mma_fifo_start[channel] + 1) & 255;
|
|
dat |= (adgold->adgold_mma_fifo[channel][adgold->adgold_mma_fifo_start[channel]] << 8);
|
|
adgold->adgold_mma_fifo_start[channel] = (adgold->adgold_mma_fifo_start[channel] + 1) & 255;
|
|
adgold->adgold_mma_out[channel] = dat;
|
|
break;
|
|
}
|
|
|
|
if (adgold->adgold_mma_regs[channel][0xc] & 1)
|
|
{
|
|
adgold_getsamp_dma(adgold, channel);
|
|
}
|
|
if (((adgold->adgold_mma_fifo_end[channel] - adgold->adgold_mma_fifo_start[channel]) & 255) < adgold->adgold_mma_intpos[channel] && !(adgold->adgold_mma_status & 0x01))
|
|
{
|
|
// pclog("adgold_mma_poll - IRQ! %i\n", channel);
|
|
adgold->adgold_mma_status |= 1 << channel;
|
|
adgold_update_irq_status(adgold);
|
|
}
|
|
}
|
|
if (adgold->adgold_mma_fifo_start[channel] == adgold->adgold_mma_fifo_end[channel])
|
|
{
|
|
adgold->adgold_mma_enable[channel] = 0;
|
|
}
|
|
}
|
|
|
|
void adgold_timer_poll(void *p)
|
|
{
|
|
adgold_t *adgold = (adgold_t *)p;
|
|
|
|
while (adgold->adgold_mma_timer_count <= 0)
|
|
{
|
|
adgold->adgold_mma_timer_count += (int)((double)TIMER_USEC * 1.88964);
|
|
if (adgold->adgold_mma_regs[0][8] & 0x01) /*Timer 0*/
|
|
{
|
|
adgold->adgold_mma.timer0_count--;
|
|
if (!adgold->adgold_mma.timer0_count)
|
|
{
|
|
adgold->adgold_mma.timer0_count = adgold->adgold_mma.timer0_latch;
|
|
pclog("Timer 0 interrupt\n");
|
|
adgold->adgold_mma_status |= 0x10;
|
|
adgold_update_irq_status(adgold);
|
|
}
|
|
}
|
|
if (adgold->adgold_mma_regs[0][8] & 0x08) /*Base timer*/
|
|
{
|
|
adgold->adgold_mma.timerbase_count--;
|
|
if (!adgold->adgold_mma.timerbase_count)
|
|
{
|
|
adgold->adgold_mma.timerbase_count = adgold->adgold_mma.timerbase_latch;
|
|
if (adgold->adgold_mma_regs[0][8] & 0x02) /*Timer 1*/
|
|
{
|
|
adgold->adgold_mma.timer1_count--;
|
|
if (!adgold->adgold_mma.timer1_count)
|
|
{
|
|
adgold->adgold_mma.timer1_count = adgold->adgold_mma.timer1_latch;
|
|
pclog("Timer 1 interrupt\n");
|
|
adgold->adgold_mma_status |= 0x20;
|
|
adgold_update_irq_status(adgold);
|
|
}
|
|
}
|
|
if (adgold->adgold_mma_regs[0][8] & 0x04) /*Timer 2*/
|
|
{
|
|
adgold->adgold_mma.timer2_count--;
|
|
if (!adgold->adgold_mma.timer2_count)
|
|
{
|
|
adgold->adgold_mma.timer2_count = adgold->adgold_mma.timer2_latch;
|
|
pclog("Timer 2 interrupt\n");
|
|
adgold->adgold_mma_status |= 0x40;
|
|
adgold_update_irq_status(adgold);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (adgold->adgold_mma_enable[0])
|
|
{
|
|
adgold->adgold_mma.voice_count[0]--;
|
|
if (!adgold->adgold_mma.voice_count[0])
|
|
{
|
|
adgold->adgold_mma.voice_count[0] = adgold->adgold_mma.voice_latch[0];
|
|
adgold_mma_poll(adgold, 0);
|
|
}
|
|
}
|
|
if (adgold->adgold_mma_enable[1])
|
|
{
|
|
adgold->adgold_mma.voice_count[1]--;
|
|
if (!adgold->adgold_mma.voice_count[1])
|
|
{
|
|
adgold->adgold_mma.voice_count[1] = adgold->adgold_mma.voice_latch[1];
|
|
adgold_mma_poll(adgold, 1);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void adgold_poll(void *p)
|
|
{
|
|
adgold_t *adgold = (adgold_t *)p;
|
|
|
|
if (adgold->pos >= SOUNDBUFLEN)
|
|
return;
|
|
|
|
opl3_poll(&adgold->opl, &adgold->opl_buffer[adgold->pos * 2], &adgold->opl_buffer[(adgold->pos * 2) + 1]);
|
|
adgold->mma_buffer[0][adgold->pos] = adgold->mma_buffer[1][adgold->pos] = 0;
|
|
|
|
if (adgold->adgold_mma_regs[0][9] & 0x20)
|
|
adgold->mma_buffer[0][adgold->pos] += adgold->adgold_mma_out[0] / 2;
|
|
if (adgold->adgold_mma_regs[0][9] & 0x40)
|
|
adgold->mma_buffer[1][adgold->pos] += adgold->adgold_mma_out[0] / 2;
|
|
|
|
if (adgold->adgold_mma_regs[1][9] & 0x20)
|
|
adgold->mma_buffer[0][adgold->pos] += adgold->adgold_mma_out[1] / 2;
|
|
if (adgold->adgold_mma_regs[1][9] & 0x40)
|
|
adgold->mma_buffer[1][adgold->pos] += adgold->adgold_mma_out[1] / 2;
|
|
|
|
adgold->pos++;
|
|
}
|
|
|
|
static void adgold_get_buffer(int16_t *buffer, int len, void *p)
|
|
{
|
|
adgold_t *adgold = (adgold_t *)p;
|
|
|
|
int c;
|
|
|
|
for (c = 0; c < len * 2; c++)
|
|
{
|
|
buffer[c] += adgold->opl_buffer[c];
|
|
buffer[c] += adgold->mma_buffer[c & 1][c >> 1] / 2;
|
|
}
|
|
|
|
adgold->pos = 0;
|
|
}
|
|
|
|
|
|
void *adgold_init()
|
|
{
|
|
adgold_t *adgold = malloc(sizeof(adgold_t));
|
|
memset(adgold, 0, sizeof(adgold_t));
|
|
|
|
opl3_init(&adgold->opl);
|
|
|
|
adgold->adgold_status = 0xf;
|
|
adgold->adgold_38x_addr = 0;
|
|
adgold->adgold_eeprom[0x09] = adgold->adgold_eeprom[0x0a] = 255;
|
|
adgold->adgold_eeprom[0x13] = 3 | (1 << 4); /*IRQ 7, DMA 1*/
|
|
adgold->adgold_eeprom[0x14] = 3 << 4; /*DMA 3*/
|
|
adgold->adgold_eeprom[0x15] = 0x388 / 8; /*Present at 388-38f*/
|
|
memcpy(adgold->adgold_38x_regs, adgold->adgold_eeprom, 0x19);
|
|
|
|
adgold->adgold_mma_enable[0] = 0;
|
|
adgold->adgold_mma_fifo_start[0] = adgold->adgold_mma_fifo_end[0] = 0;
|
|
|
|
/*388/389 are handled by adlib_init*/
|
|
io_sethandler(0x0388, 0x0008, adgold_read, NULL, NULL, adgold_write, NULL, NULL, adgold);
|
|
|
|
timer_add(adgold_timer_poll, &adgold->adgold_mma_timer_count, TIMER_ALWAYS_ENABLED, adgold);
|
|
|
|
sound_add_handler(adgold_poll, adgold_get_buffer, adgold);
|
|
|
|
return adgold;
|
|
}
|
|
|
|
void adgold_close(void *p)
|
|
{
|
|
adgold_t *adgold = (adgold_t *)p;
|
|
|
|
free(adgold);
|
|
}
|
|
|
|
device_t adgold_device =
|
|
{
|
|
"AdLib Gold",
|
|
0,
|
|
adgold_init,
|
|
adgold_close,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
NULL
|
|
};
|