6e2b91c3d1
Fixed FDI stream parameters passed to the 86F handler, FDI stream images now read correctly again; The National Semiconductors PC87306 SuperI/O chip now supports enhanced FDC mode.
126 lines
2.8 KiB
C
126 lines
2.8 KiB
C
/*PCem v0.8 by Tom Walker
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Windows Sound System emulation*/
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#include <math.h>
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#include <stdlib.h>
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#include "ibm.h"
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#include "device.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 "sound_ad1848.h"
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#include "sound_opl.h"
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#include "sound_wss.h"
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/*530, 11, 3 - 530=23*/
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/*530, 11, 1 - 530=22*/
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/*530, 11, 0 - 530=21*/
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/*530, 10, 1 - 530=1a*/
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/*530, 9, 1 - 530=12*/
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/*530, 7, 1 - 530=0a*/
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/*604, 11, 1 - 530=22*/
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/*e80, 11, 1 - 530=22*/
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/*f40, 11, 1 - 530=22*/
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static int wss_dma[4] = {0, 0, 1, 3};
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static int wss_irq[8] = {5, 7, 9, 10, 11, 12, 14, 15}; /*W95 only uses 7-9, others may be wrong*/
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static uint16_t wss_addr[4] = {0x530, 0x604, 0xe80, 0xf40};
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typedef struct wss_t
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{
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uint8_t config;
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ad1848_t ad1848;
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opl_t opl;
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} wss_t;
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uint8_t wss_read(uint16_t addr, void *p)
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{
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wss_t *wss = (wss_t *)p;
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uint8_t temp;
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// pclog("wss_read - addr %04X %04X(%08X):%08X ", addr, CS, cs, pc);
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temp = 4 | (wss->config & 0x40);
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// pclog("return %02X\n", temp);
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return temp;
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}
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void wss_write(uint16_t addr, uint8_t val, void *p)
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{
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wss_t *wss = (wss_t *)p;
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// pclog("wss_write - addr %04X val %02X %04X(%08X):%08X\n", addr, val, CS, cs, pc);
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wss->config = val;
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ad1848_setdma(&wss->ad1848, wss_dma[val & 3]);
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ad1848_setirq(&wss->ad1848, wss_irq[(val >> 3) & 7]);
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}
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static void wss_get_buffer(int32_t *buffer, int len, void *p)
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{
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wss_t *wss = (wss_t *)p;
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int c;
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opl3_update2(&wss->opl);
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ad1848_update(&wss->ad1848);
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for (c = 0; c < len * 2; c++)
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{
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buffer[c] += wss->opl.buffer[c];
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buffer[c] += (wss->ad1848.buffer[c] / 2);
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}
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wss->opl.pos = 0;
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wss->ad1848.pos = 0;
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}
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void *wss_init()
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{
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wss_t *wss = malloc(sizeof(wss_t));
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int c;
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double attenuation;
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memset(wss, 0, sizeof(wss_t));
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opl3_init(&wss->opl);
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ad1848_init(&wss->ad1848);
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ad1848_setirq(&wss->ad1848, 7);
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ad1848_setdma(&wss->ad1848, 3);
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io_sethandler(0x0388, 0x0004, opl3_read, NULL, NULL, opl3_write, NULL, NULL, &wss->opl);
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io_sethandler(0x0530, 0x0004, wss_read, NULL, NULL, wss_write, NULL, NULL, wss);
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io_sethandler(0x0534, 0x0004, ad1848_read, NULL, NULL, ad1848_write, NULL, NULL, &wss->ad1848);
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sound_add_handler(wss_get_buffer, wss);
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return wss;
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}
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void wss_close(void *p)
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{
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wss_t *wss = (wss_t *)p;
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free(wss);
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}
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void wss_speed_changed(void *p)
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{
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wss_t *wss = (wss_t *)p;
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ad1848_speed_changed(&wss->ad1848);
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}
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device_t wss_device =
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{
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"Windows Sound System",
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0,
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wss_init,
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wss_close,
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NULL,
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wss_speed_changed,
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NULL,
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NULL
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};
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