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More mitsumi cdrom stuff

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This commit is contained in:
Jasmine Iwanek
2022-11-05 20:15:00 -04:00
parent a699a6ceb3
commit 381960dfc0
6 changed files with 536 additions and 10 deletions
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2
src/cdrom/CMakeLists.txt
View File

@@ -13,4 +13,4 @@
# Copyright 2020,2021 David Hrdlička.
#
add_library(cdrom OBJECT cdrom.c cdrom_image_backend.c cdrom_image_viso.c cdrom_image.c)
add_library(cdrom OBJECT cdrom.c cdrom_image_backend.c cdrom_image_viso.c cdrom_image.c cdrom_mitsumi.c)

74
src/cdrom/cdrom.c
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@@ -322,13 +322,13 @@ cdrom_audio_callback(cdrom_t *dev, int16_t *output, int len)
}
static __inline int
bin2bcd (int x)
bin2bcd(int x)
{
return (x % 10) | ((x / 10) << 4);
}
static __inline int
bcd2bin (int x)
bcd2bin(int x)
{
return (x >> 4) * 10 + (x & 0x0f);
}
@@ -385,9 +385,9 @@ cdrom_audio_play(cdrom_t *dev, uint32_t pos, uint32_t len, int ismsf)
} else
pos = MSFtoLBA(m, s, f) - 150;
m = (len >> 16) & 0xff;
s = (len >> 8) & 0xff;
f = len & 0xff;
m = (len >> 16) & 0xff;
s = (len >> 8) & 0xff;
f = len & 0xff;
/* NEC CDR-260 speaks BCD. */
if ((dev->bus_type == CDROM_BUS_ATAPI) && dev->early)
@@ -524,7 +524,7 @@ cdrom_get_current_subchannel(cdrom_t *dev, uint8_t *b, int msf)
b[pos++] = subc.index;
if (msf) {
b[pos] = 0;
b[pos] = 0;
/* NEC CDR-260 speaks BCD. */
if ((dev->bus_type == CDROM_BUS_ATAPI) && dev->early) {
@@ -543,7 +543,7 @@ cdrom_get_current_subchannel(cdrom_t *dev, uint8_t *b, int msf)
pos += 4;
b[pos] = 0;
b[pos] = 0;
/* NEC CDR-260 speaks BCD. */
if ((dev->bus_type == CDROM_BUS_ATAPI) && dev->early) {
@@ -803,7 +803,7 @@ cdrom_read_toc(cdrom_t *dev, unsigned char *b, int type, unsigned char start_tra
return len;
}
/* A new API call for Mitsumi CD-ROM. */
/* New API calls for Mitsumi CD-ROM. */
void
cdrom_get_track_buffer(cdrom_t *dev, uint8_t *buf)
{
@@ -827,6 +827,64 @@ cdrom_get_track_buffer(cdrom_t *dev, uint8_t *buf)
memset(buf, 0x00, 9);
}
void
cdrom_get_q(cdrom_t *dev, uint8_t *buf, int *curtoctrk, uint8_t mode)
{
track_info_t ti;
int first_track, last_track;
if (dev != NULL) {
dev->ops->get_tracks(dev, &first_track, &last_track);
dev->ops->get_track_info(dev, *curtoctrk, 0, &ti);
buf[0] = (ti.attr << 4) & 0xf0;
buf[1] = ti.number;
buf[2] = CD_BCD(*curtoctrk + 1);
buf[3] = ti.m;
buf[4] = ti.s;
buf[5] = ti.f;
buf[6] = 0x00;
dev->ops->get_track_info(dev, 1, 0, &ti);
buf[7] = ti.m;
buf[8] = ti.s;
buf[9] = ti.f;
if (*curtoctrk >= (last_track + 1))
*curtoctrk = 0;
else if (mode)
*curtoctrk = *curtoctrk + 1;
} else
memset(buf, 0x00, 10);
}
uint8_t
cdrom_mitsumi_audio_play(cdrom_t *dev, uint32_t pos, uint32_t len)
{
track_info_t ti;
if (dev->cd_status == CD_STATUS_DATA_ONLY)
return 0;
cdrom_log("CD-ROM 0: Play Mitsumi audio - %08X %08X\n", pos, len);
dev->ops->get_track_info(dev, pos, 0, &ti);
pos = MSFtoLBA(ti.m, ti.s, ti.f) - 150;
dev->ops->get_track_info(dev, len, 1, &ti);
len = MSFtoLBA(ti.m, ti.s, ti.f) - 150;
/* Do this at this point, since it's at this point that we know the
actual LBA position to start playing from. */
if (!(dev->ops->track_type(dev, pos) & CD_TRACK_AUDIO)) {
cdrom_log("CD-ROM %i: LBA %08X not on an audio track\n", dev->id, pos);
cdrom_stop(dev);
return 0;
}
dev->seek_pos = pos;
dev->cd_end = len;
dev->cd_status = CD_STATUS_PLAYING;
dev->cd_buflen = 0;
return 1;
}
void
cdrom_read_disc_info_toc(cdrom_t *dev, unsigned char *b, unsigned char track, int type)
{

443
src/cdrom/cdrom_mitsumi.c Normal file
View File

@@ -0,0 +1,443 @@
/*
* 86Box A hypervisor and IBM PC system emulator that specializes in
* running old operating systems and software designed for IBM
* PC systems and compatibles from 1981 through fairly recent
* system designs based on the PCI bus.
*
* This file is part of the 86Box distribution.
*
* Mitsumi CD-ROM emulation for the ISA bus.
*
*
*
* Author: Miran Grca, <mgrca8@gmail.com>
*
* Copyright 2022 Miran Grca.
*/
#include <inttypes.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <wchar.h>
#define HAVE_STDARG_H
#include <86box/86box.h>
#include <86box/device.h>
#include <86box/io.h>
#include <86box/pic.h>
#include <86box/dma.h>
#include <86box/cdrom.h>
#include <86box/cdrom_mitsumi.h>
#include <86box/plat.h>
#include <86box/sound.h>
#define RAW_SECTOR_SIZE 2352
#define COOKED_SECTOR_SIZE 2048
enum {
STAT_CMD_CHECK = 0x01,
STAT_PLAY_CDDA = 0x02,
STAT_ERROR = 0x04,
STAT_DISK_CDDA = 0x08,
STAT_SPIN = 0x10,
STAT_CHANGE = 0x20,
STAT_READY = 0x40,
STAT_OPEN = 0x80
};
enum {
CMD_GET_INFO = 0x10,
CMD_GET_Q = 0x20,
CMD_GET_STAT = 0x40,
CMD_SET_MODE = 0x50,
CMD_SOFT_RESET = 0x60,
CMD_STOPCDDA = 0x70,
CMD_CONFIG = 0x90,
CMD_SET_VOL = 0xae,
CMD_READ1X = 0xc0,
CMD_READ2X = 0xc1,
CMD_GET_VER = 0xdc,
CMD_STOP = 0xf0,
CMD_EJECT = 0xf6,
CMD_LOCK = 0xfe
};
enum {
MODE_MUTE = 0x01,
MODE_GET_TOC = 0x04,
MODE_STOP = 0x08,
MODE_ECC = 0x20,
MODE_DATA = 0x40
};
enum {
DRV_MODE_STOP,
DRV_MODE_READ,
DRV_MODE_CDDA
};
enum {
FLAG_NODATA = 2,
FLAG_NOSTAT = 4,
FLAG_UNK = 8, //??
FLAG_OPEN = 16
};
enum {
IRQ_DATAREADY = 1,
IRQ_DATACOMP = 2,
IRQ_ERROR = 4
};
typedef struct {
int dma, irq;
int change;
int data;
uint8_t stat;
uint8_t buf[RAW_SECTOR_SIZE];
int buf_count;
int buf_idx;
uint8_t cmdbuf[16];
int cmdbuf_count;
int cmdrd_count;
int cmdbuf_idx;
uint8_t mode;
uint8_t cmd;
uint8_t conf;
uint8_t enable_irq;
uint8_t enable_dma;
uint16_t dmalen;
uint32_t readmsf;
uint32_t readcount;
int locked;
int drvmode;
int cur_toc_track;
int pos;
} mcd_t;
/* The addresses sent from the guest are absolute, ie. a LBA of 0 corresponds to a MSF of 00:00:00. Otherwise, the counter displayed by the guest is wrong:
there is a seeming 2 seconds in which audio plays but counter does not move, while a data track before audio jumps to 2 seconds before the actual start
of the audio while audio still plays. With an absolute conversion, the counter is fine. */
#undef MSFtoLBA
#define MSFtoLBA(m, s, f) ((((m * 60) + s) * 75) + f)
#define CD_BCD(x) (((x) % 10) | (((x) / 10) << 4))
#define CD_DCB(x) ((((x) &0xf0) >> 4) * 10 + ((x) &0x0f))
#ifdef ENABLE_MITSUMI_CDROM_LOG
int mitsumi_cdrom_do_log = ENABLE_MITSUMI_CDROM_LOG;
void
mitsumi_cdrom_log(const char *fmt, ...)
{
va_list ap;
if (mitsumi_cdrom_do_log) {
va_start(ap, fmt);
pclog_ex(fmt, ap);
va_end(ap);
}
}
#else
# define mitsumi_cdrom_log(fmt, ...)
#endif
static void
mitsumi_cdrom_reset(mcd_t *dev)
{
cdrom_t *cdrom = &cdrom[0];
dev->stat = cdrom->host_drive ? (STAT_READY | STAT_CHANGE) : 0;
dev->cmdrd_count = 0;
dev->cmdbuf_count = 0;
dev->buf_count = 0;
dev->cur_toc_track = 0;
dev->enable_dma = 0;
dev->enable_irq = 0;
dev->conf = 0;
dev->dmalen = COOKED_SECTOR_SIZE;
dev->locked = 0;
dev->change = 1;
dev->data = 0;
}
static int
mitsumi_cdrom_read_sector(mcd_t *dev, int first)
{
cdrom_t *cdrom = &cdrom[0];
uint8_t status;
int ret;
if (cdrom == NULL)
return 0;
if (dev->drvmode == DRV_MODE_CDDA) {
status = cdrom_mitsumi_audio_play(cdrom, dev->readmsf, dev->readcount);
if (status == 1)
return status;
else
dev->drvmode = DRV_MODE_READ;
}
if ((dev->enable_irq & IRQ_DATACOMP) && !first) {
picint(1 << dev->irq);
}
if (!dev->readcount) {
dev->data = 0;
return 0;
}
cdrom_stop(cdrom);
ret = cdrom_readsector_raw(cdrom, dev->buf, cdrom->seek_pos, 0, 2, 0x10, &dev->readcount);
if (!ret)
return 0;
if (dev->mode & 0x40) {
dev->buf[12] = CD_BCD((dev->readmsf >> 16) & 0xff);
dev->buf[13] = CD_BCD((dev->readmsf >> 8) & 0xff);
}
dev->readmsf = cdrom_lba_to_msf_accurate(cdrom->seek_pos + 1);
dev->buf_count = dev->dmalen + 1;
dev->buf_idx = 0;
dev->data = 1;
if (dev->enable_dma) {
while (dev->pos < dev->readcount) {
dma_channel_write(dev->dma, dev->buf[dev->pos]);
dev->pos++;
}
dev->pos = 0;
}
dev->readcount--;
if ((dev->enable_irq & IRQ_DATAREADY) && first)
picint(1 << dev->irq);
return 1;
}
static uint8_t
mitsumi_cdrom_in(uint16_t port, void *priv)
{
mcd_t *dev = (mcd_t *) priv;
uint8_t ret;
switch (port & 1) {
case 0:
if (dev->cmdbuf_count) {
dev->cmdbuf_count--;
return dev->cmdbuf[dev->cmdbuf_idx++];
} else if (dev->buf_count) {
ret = (dev->buf_idx < RAW_SECTOR_SIZE) ? dev->buf[dev->buf_idx] : 0;
dev->buf_idx++;
dev->buf_count--;
if (!dev->buf_count)
mitsumi_cdrom_read_sector(dev, 0);
return ret;
}
return dev->stat;
case 1:
ret = 0;
picintc(1 << dev->irq);
if (!dev->buf_count || !dev->data || dev->enable_dma)
ret |= FLAG_NODATA;
if (!dev->cmdbuf_count)
ret |= FLAG_NOSTAT;
return ret | FLAG_UNK;
}
return (0xff);
}
static void
mitsumi_cdrom_out(uint16_t port, uint8_t val, void *priv)
{
mcd_t *dev = (mcd_t *) priv;
cdrom_t *cdrom = &cdrom[0];
switch (port & 1) {
case 0:
if (dev->cmdrd_count) {
dev->cmdrd_count--;
switch (dev->cmd) {
case CMD_SET_MODE:
dev->mode = val;
dev->cmdbuf[1] = 0;
dev->cmdbuf_count = 2;
break;
case CMD_LOCK:
dev->locked = val & 1;
dev->cmdbuf[1] = 0;
dev->cmdbuf[2] = 0;
dev->cmdbuf_count = 3;
break;
case CMD_CONFIG:
switch (dev->cmdrd_count) {
case 0:
switch (dev->conf) {
case 0x01:
dev->dmalen |= val;
break;
case 0x02:
dev->enable_dma = val;
break;
case 0x10:
dev->enable_irq = val;
break;
}
dev->cmdbuf[1] = 0;
dev->cmdbuf_count = 2;
dev->conf = 0;
break;
case 1:
if (dev->conf == 1) {
dev->dmalen = val << 8;
break;
}
dev->conf = val;
if (dev->conf == 1)
dev->cmdrd_count++;
break;
}
break;
case CMD_READ1X:
case CMD_READ2X:
switch (dev->cmdrd_count) {
case 0:
dev->readcount |= val;
mitsumi_cdrom_read_sector(dev, 1);
dev->cmdbuf_count = 1;
dev->cmdbuf[0] = STAT_SPIN | STAT_READY;
break;
case 1:
dev->readcount |= (val << 8);
break;
case 2:
dev->readcount = (val << 16);
break;
case 5:
dev->readmsf = 0;
case 4:
case 3:
dev->readmsf |= CD_DCB(val) << ((dev->cmdrd_count - 3) << 3);
break;
}
break;
}
if (!dev->cmdrd_count)
dev->stat = cdrom->host_drive ? (STAT_READY | (dev->change ? STAT_CHANGE : 0)) : 0;
return;
}
dev->cmd = val;
dev->cmdbuf_idx = 0;
dev->cmdrd_count = 0;
dev->cmdbuf_count = 1;
dev->cmdbuf[0] = cdrom->host_drive ? (STAT_READY | (dev->change ? STAT_CHANGE : 0)) : 0;
dev->data = 0;
switch (val) {
case CMD_GET_INFO:
if (cdrom->host_drive) {
cdrom_get_track_buffer(cdrom, &(dev->cmdbuf[1]));
dev->cmdbuf_count = 10;
dev->readcount = 0;
} else {
dev->cmdbuf_count = 1;
dev->cmdbuf[0] = STAT_CMD_CHECK;
}
break;
case CMD_GET_Q:
if (cdrom->host_drive) {
cdrom_get_q(cdrom, &(dev->cmdbuf[1]), &dev->cur_toc_track, dev->mode & MODE_GET_TOC);
dev->cmdbuf_count = 11;
dev->readcount = 0;
} else {
dev->cmdbuf_count = 1;
dev->cmdbuf[0] = STAT_CMD_CHECK;
}
break;
case CMD_GET_STAT:
dev->change = 0;
break;
case CMD_SET_MODE:
dev->cmdrd_count = 1;
break;
case CMD_STOPCDDA:
case CMD_STOP:
cdrom_stop(cdrom);
dev->drvmode = DRV_MODE_STOP;
dev->cur_toc_track = 0;
break;
case CMD_CONFIG:
dev->cmdrd_count = 2;
break;
case CMD_READ1X:
case CMD_READ2X:
if (cdrom->host_drive) {
dev->readcount = 0;
dev->drvmode = (val == CMD_READ1X) ? DRV_MODE_CDDA : DRV_MODE_READ;
dev->cmdrd_count = 6;
} else {
dev->cmdbuf_count = 1;
dev->cmdbuf[0] = STAT_CMD_CHECK;
}
break;
case CMD_GET_VER:
dev->cmdbuf[1] = 1;
dev->cmdbuf[2] = 'D';
dev->cmdbuf[3] = 0;
dev->cmdbuf_count = 4;
break;
case CMD_EJECT:
cdrom_stop(cdrom);
cdrom_eject(0);
dev->readcount = 0;
break;
case CMD_LOCK:
dev->cmdrd_count = 1;
break;
default:
dev->cmdbuf[0] = dev->stat | STAT_CMD_CHECK;
break;
}
break;
case 1:
mitsumi_cdrom_reset(dev);
break;
}
}
static void *
mitsumi_cdrom_init(const device_t *info)
{
mcd_t *dev;
dev = malloc(sizeof(mcd_t));
memset(dev, 0x00, sizeof(mcd_t));
dev->irq = 5;
dev->dma = 5;
io_sethandler(0x310, 2,
mitsumi_cdrom_in, NULL, NULL, mitsumi_cdrom_out, NULL, NULL, dev);
mitsumi_cdrom_reset(dev);
return dev;
}
static void
mitsumi_cdrom_close(void *priv)
{
mcd_t *dev = (mcd_t *) priv;
if (dev) {
free(dev);
dev = NULL;
}
}
const device_t mitsumi_cdrom_device = {
"Mitsumi CD-ROM interface",
"mcd",
DEVICE_ISA | DEVICE_AT,
0,
mitsumi_cdrom_init,
mitsumi_cdrom_close,
NULL,
{ NULL },
NULL,
NULL,
NULL
};

3
src/include/86box/cdrom.h
View File

@@ -56,6 +56,7 @@ enum {
CDROM_BUS_DISABLED = 0,
CDROM_BUS_ATAPI = 5,
CDROM_BUS_SCSI,
CDROM_BUS_MITSUMI,
CDROM_BUS_USB
};
@@ -145,6 +146,8 @@ extern uint8_t cdrom_get_current_subcodeq_playstatus(cdrom_t *dev, uint8_t *b);
extern int cdrom_read_toc(cdrom_t *dev, unsigned char *b, int type,
unsigned char start_track, int msf, int max_len);
extern void cdrom_get_track_buffer(cdrom_t *dev, uint8_t *buf);
extern void cdrom_get_q(cdrom_t *dev, uint8_t *buf, int *curtoctrk, uint8_t mode);
extern uint8_t cdrom_mitsumi_audio_play(cdrom_t *dev, uint32_t pos, uint32_t len);
extern int cdrom_readsector_raw(cdrom_t *dev, uint8_t *buffer, int sector, int ismsf,
int cdrom_sector_type, int cdrom_sector_flags, int *len);
extern void cdrom_read_disc_info_toc(cdrom_t *dev, unsigned char *b, unsigned char track, int type);

22
src/include/86box/cdrom_mitsumi.h Normal file
View File

@@ -0,0 +1,22 @@
/*
* 86Box A hypervisor and IBM PC system emulator that specializes in
* running old operating systems and software designed for IBM
* PC systems and compatibles from 1981 through fairly recent
* system designs based on the PCI bus.
*
* This file is part of the 86Box distribution.
*
* Mitsumi CD-ROM emulation for the ISA bus.
*
*
*
* Author: Miran Grca, <mgrca8@gmail.com>
*
* Copyright 2022 Miran Grca.
*/
#ifndef CDROM_MITSUMI_H
#define CDROM_MITSUMI_H
extern const device_t mitsumi_cdrom_device;
#endif /*CDROM_MITSUMI_H*/

2
src/win/Makefile.mingw
View File

@@ -633,7 +633,7 @@ MINIVHDOBJ := cwalk.o libxml2_encoding.o minivhd_convert.o \
minivhd_struct_rw.o minivhd_util.o
CDROMOBJ := cdrom.o \
cdrom_image_backend.o cdrom_image_viso.o cdrom_image.o
cdrom_image_backend.o cdrom_image_viso.o cdrom_image.o cdrom_mitsumi.o
ZIPOBJ := zip.o