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Add MegaCD support code.

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This commit is contained in:
sorgelig
2019-11-20 00:15:29 +08:00
parent d200a77c10
commit b33d930bfa
10 changed files with 1260 additions and 1 deletions
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1
Makefile
View File

@@ -32,6 +32,7 @@ CPP_SRC = $(wildcard *.cpp) \
$(wildcard ./support/x86/*.cpp) \
$(wildcard ./support/snes/*.cpp) \
$(wildcard ./support/neogeo/*.cpp) \
$(wildcard ./support/megacd/*.cpp) \
lib/lodepng/lodepng.cpp
IMG = $(wildcard *.png)

3
MiSTer.vcxproj
View File

@@ -75,6 +75,8 @@
<ClCompile Include="scheduler.cpp" />
<ClCompile Include="spi.cpp" />
<ClCompile Include="support\archie\archie.cpp" />
<ClCompile Include="support\megacd\cdd.cpp" />
<ClCompile Include="support\megacd\megacd.cpp" />
<ClCompile Include="support\minimig\minimig_boot.cpp" />
<ClCompile Include="support\minimig\minimig_config.cpp" />
<ClCompile Include="support\minimig\minimig_fdd.cpp" />
@@ -126,6 +128,7 @@
<ClInclude Include="spi.h" />
<ClInclude Include="support.h" />
<ClInclude Include="support\archie\archie.h" />
<ClInclude Include="support\megacd\megacd.h" />
<ClInclude Include="support\minimig\minimig_boot.h" />
<ClInclude Include="support\minimig\minimig_config.h" />
<ClInclude Include="support\minimig\minimig_fdd.h" />

9
MiSTer.vcxproj.filters
View File

@@ -148,6 +148,12 @@
<ClCompile Include="joymapping.cpp">
<Filter>Source Files</Filter>
</ClCompile>
<ClCompile Include="support\megacd\cdd.cpp">
<Filter>Source Files</Filter>
</ClCompile>
<ClCompile Include="support\megacd\megacd.cpp">
<Filter>Source Files</Filter>
</ClCompile>
</ItemGroup>
<ItemGroup>
<ClInclude Include="battery.h">
@@ -300,5 +306,8 @@
<ClInclude Include="joymapping.h">
<Filter>Header Files</Filter>
</ClInclude>
<ClInclude Include="support\megacd\megacd.h">
<Filter>Header Files</Filter>
</ClInclude>
</ItemGroup>
</Project>

6
menu.cpp
View File

@@ -1575,6 +1575,8 @@ void HandleUI(void)
}
else
{
if (mask == 1 && is_megacd_core()) mcd_set_image(0, "");
uint32_t status = user_io_8bit_set_status(0, 0, ex);
user_io_8bit_set_status(status ^ mask, mask, ex);
@@ -1621,6 +1623,10 @@ void HandleUI(void)
{
x86_set_image(drive_num, SelectedPath);
}
else if (is_megacd_core())
{
mcd_set_image(drive_num, SelectedPath);
}
else
{
user_io_set_index(user_io_ext_idx(SelectedPath, fs_pFileExt) << 6 | (menusub + 1));

5
support.h
View File

@@ -21,4 +21,7 @@
#include "support/snes/snes.h"
// NeoGeo support
#include "support/neogeo/loader.h"
#include "support/neogeo/loader.h"
// MEGACD support
#include "support/megacd/megacd.h"

884
support/megacd/cdd.cpp Normal file
View File

@@ -0,0 +1,884 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include "../../file_io.h"
#include "megacd.h"
cdd_t cdd;
uint32_t frame = 0;
cdd_t::cdd_t() {
cycles = 0;
latency = 10;
type = 0;
loaded = 0;
index = 0;
lba = 0;
scanOffset = 0;
isData = 1;
status = CD_STAT_NO_DISC;
audioLength = 0;
audioOffset = 0;
stat[0] = 0xB;
stat[1] = 0x0;
stat[2] = 0x0;
stat[3] = 0x0;
stat[4] = 0x0;
stat[5] = 0x0;
stat[6] = 0x0;
stat[7] = 0x0;
stat[8] = 0x0;
stat[9] = 0x4;
}
int cdd_t::LoadCUE(const char* filename) {
char fname[1024 + 10];
char line[128];
char *ptr, *lptr;
char header[1024];
FILE *fd;
strcpy(fname, filename);
if (!(fd = fopen(getFullPath(fname), "r")))
return -1;
printf("\x1b[32mMCD: Open CUE: %s\n\x1b[0m", fname);
int mm, ss, bb, pregap = 0;
while (fgets(line, 128, fd))
{
lptr = line;
while (*lptr == 0x20) lptr++;
/* decode FILE commands */
if (!(memcmp(lptr, "FILE", 4)))
{
ptr = fname + strlen(fname) - 1;
while ((ptr - fname) && (*ptr != '/') && (*ptr != '\\')) ptr--;
if (ptr - fname) ptr++;
lptr += 4;
while (*lptr == 0x20) lptr++;
if (*lptr == '\"')
{
lptr++;
while ((*lptr != '\"') && (lptr <= (line + 128)) && (ptr < (fname + 1023)))
*ptr++ = *lptr++;
}
else
{
while ((*lptr != 0x20) && (lptr <= (line + 128)) && (ptr < (fname + 1023)))
*ptr++ = *lptr++;
}
*ptr = 0;
this->toc.tracks[this->toc.last].fd = fopen(getFullPath(fname), "r");
if (!this->toc.tracks[this->toc.last].fd)
return -1;
printf("\x1b[32mMCD: Open track file: %s\n\x1b[0m", fname);
pregap = 0;
this->toc.tracks[this->toc.last].offset = 0;
if (!strstr(lptr, "BINARY") && !strstr(lptr, "MOTOROLA"))
{
fclose(this->toc.tracks[this->toc.last].fd);
this->toc.tracks[this->toc.last].fd = 0;
printf("\x1b[32mMCD: unsupported file: %s\n\x1b[0m", fname);
return -1;
}
}
/* decode TRACK commands */
else if ((sscanf(lptr, "TRACK %02d %*s", &bb)) || (sscanf(lptr, "TRACK %d %*s", &bb)))
{
if (bb != (this->toc.last + 1))
{
if (this->toc.tracks[this->toc.last].fd)
{
fclose(this->toc.tracks[this->toc.last].fd);
this->toc.tracks[this->toc.last].fd = 0;
}
printf("\x1b[32mMCD: missing tracks: %s\n\x1b[0m", fname);
break;
}
if (!this->toc.last)
{
if (strstr(lptr, "MODE1/2048"))
{
this->sectorSize = 2048;
}
else if (strstr(lptr, "MODE1/2352"))
{
this->sectorSize = 2352;
fseek(this->toc.tracks[0].fd, 0x10, SEEK_SET);
}
if (this->sectorSize)
{
this->toc.tracks[0].type = 1;
fread(header, 0x210, 1, this->toc.tracks[0].fd);
fseek(this->toc.tracks[0].fd, 0, SEEK_SET);
}
}
else
{
if (!this->toc.tracks[this->toc.last].fd)
{
this->toc.tracks[this->toc.last - 1].end = 0;
}
}
}
/* decode PREGAP commands */
else if (sscanf(lptr, "PREGAP %02d:%02d:%02d", &mm, &ss, &bb) == 3)
{
pregap += bb + ss * 75 + mm * 60 * 75;
}
/* decode INDEX commands */
else if ((sscanf(lptr, "INDEX 00 %02d:%02d:%02d", &mm, &ss, &bb) == 3) ||
(sscanf(lptr, "INDEX 0 %02d:%02d:%02d", &mm, &ss, &bb) == 3))
{
if (this->toc.last && !this->toc.tracks[this->toc.last - 1].end)
{
this->toc.tracks[this->toc.last - 1].end = bb + ss * 75 + mm * 60 * 75 + pregap;
}
}
else if ((sscanf(lptr, "INDEX 01 %02d:%02d:%02d", &mm, &ss, &bb) == 3) ||
(sscanf(lptr, "INDEX 1 %02d:%02d:%02d", &mm, &ss, &bb) == 3))
{
this->toc.tracks[this->toc.last].offset += pregap * 2352;
if (!this->toc.tracks[this->toc.last].fd)
{
this->toc.tracks[this->toc.last].fd = this->toc.tracks[0].fd;
this->toc.tracks[this->toc.last].start = bb + ss * 75 + mm * 60 * 75 + pregap;
if (this->toc.last && !this->toc.tracks[this->toc.last - 1].end)
{
this->toc.tracks[this->toc.last - 1].end = this->toc.tracks[this->toc.last].start;
}
}
else
{
this->toc.tracks[this->toc.last].start = this->toc.end + pregap;
this->toc.tracks[this->toc.last].offset += this->toc.end * 2352;
{
fseek(this->toc.tracks[this->toc.last].fd, 0, SEEK_END);
if (this->toc.tracks[this->toc.last].type)
{
this->toc.tracks[this->toc.last].end = this->toc.tracks[this->toc.last].start + ((ftell(this->toc.tracks[this->toc.last].fd) + this->sectorSize - 1) / this->sectorSize);
}
else
{
this->toc.tracks[this->toc.last].end = this->toc.tracks[this->toc.last].start + ((ftell(this->toc.tracks[this->toc.last].fd) + 2351) / 2352);
}
fseek(this->toc.tracks[this->toc.last].fd, 0, SEEK_SET);
}
this->toc.tracks[this->toc.last].start += (bb + ss * 75 + mm * 60 * 75);
this->toc.end = this->toc.tracks[this->toc.last].end;
}
printf("\x1b[32mMCD: Track = %u, start = %u, end = %u, offset = %u, type = %u\n\x1b[0m", cdd.toc.last, cdd.toc.tracks[cdd.toc.last].start, cdd.toc.tracks[cdd.toc.last].end, cdd.toc.tracks[cdd.toc.last].offset, cdd.toc.tracks[cdd.toc.last].type);
this->toc.last++;
if (this->toc.last == 99) break;
}
}
if (this->toc.last && !this->toc.tracks[this->toc.last - 1].end)
{
this->toc.end += pregap;
this->toc.tracks[this->toc.last - 1].end = this->toc.end;
}
if (this->toc.tracks[this->toc.last].fd)
{
fclose(this->toc.tracks[this->toc.last].fd);
}
fclose(fd);
return 0;
}
int cdd_t::Load(const char *filename)
{
char fname[1024 + 10];
char header[1024];
FILE *fd_img;
Unload();
if (LoadCUE(filename)) {
return (-1);
}
fd_img = this->toc.tracks[0].fd;
fseek(fd_img, 0, SEEK_SET);
fread(header, 0x10, 1, fd_img);
if (!memcmp("SEGADISCSYSTEM", header, 14))
{
this->sectorSize = 2048;
}
else
{
fread(header, 0x10, 1, fd_img);
if (!memcmp("SEGADISCSYSTEM", header, 14))
{
this->sectorSize = 2352;
}
}
if (this->sectorSize)
{
fread(header + 0x10, 0x200, 1, fd_img);
fseek(fd_img, 0, SEEK_SET);
}
else
{
fclose(fd_img);
return (-1);
}
printf("\x1b[32mMCD: Sector size = %u, Track 0 end = %u\n\x1b[0m", this->sectorSize, this->toc.tracks[0].end);
if (this->toc.last)
{
this->toc.tracks[this->toc.last].start = this->toc.end;
this->loaded = 1;
memcpy(&fname[strlen(fname) - 4], ".sub", 4);
this->toc.sub = fopen(getFullPath(fname), "r");
printf("\x1b[32mMCD: CD mounted , last track = %u\n\x1b[0m", this->toc.last);
return 1;
}
return 0;
}
void cdd_t::Unload()
{
if (this->loaded)
{
for (int i = 0; i < this->toc.last; i++)
{
if (this->toc.tracks[i].fd)
{
if ((i > 0) && (this->toc.tracks[i].fd == this->toc.tracks[i - 1].fd))
{
i++;
}
else
{
fclose(this->toc.tracks[i].fd);
}
}
}
if (this->toc.sub) {
fclose(this->toc.sub);
}
this->loaded = 0;
}
memset(&this->toc, 0x00, sizeof(this->toc));
this->sectorSize = 0;
}
void cdd_t::Update() {
if (this->status == CD_STAT_STOP || this->status == CD_STAT_TRAY || this->status == CD_STAT_OPEN)
{
if (this->latency > 0)
{
this->latency--;
return;
}
this->status = this->loaded ? CD_STAT_TOC : CD_STAT_NO_DISC;
}
else if (this->status == CD_STAT_SEEK)
{
if (this->latency > 0)
{
this->latency--;
return;
}
this->status = CD_STAT_PAUSE;
}
else if (this->status == CD_STAT_PLAY)
{
if (this->latency > 0)
{
this->latency--;
return;
}
if (this->index >= this->toc.last)
{
this->status = CD_STAT_END;
return;
}
if (this->toc.sub)
{
//mcd_sub_send();
}
if (this->toc.tracks[this->index].type)
{
// CD-ROM (Mode 1)
uint8_t header[4];
msf_t msf;
LBAToMSF(this->lba + 150, &msf);
header[0] = BCD(msf.m);
header[1] = BCD(msf.s);
header[2] = BCD(msf.f);
header[3] = 0x01;
SectorSend(header);
//printf("\x1b[32mMCD: Data sector send = %i, frame = %u\n\x1b[0m", this->lba, frame);
}
else
{
if (this->lba >= this->toc.tracks[this->index].start)
{
this->isData = 0x00;
}
SectorSend(0);
}
this->lba++;
if (this->lba >= this->toc.tracks[this->index].end)
{
this->index++;
this->isData = 0x01;
if (this->toc.tracks[this->index].fd)
{
fseek(this->toc.tracks[this->index].fd, (this->toc.tracks[this->index].start * 2352) - this->toc.tracks[this->index].offset, SEEK_SET);
}
}
}
else if (cdd.status == CD_STAT_SCAN)
{
this->lba += this->scanOffset;
if (this->lba >= this->toc.tracks[this->index].end)
{
this->index++;
if (this->index < this->toc.last)
{
this->lba = this->toc.tracks[this->index].start;
}
else
{
this->lba = this->toc.end;
this->status = CD_STAT_END;
this->isData = 0x01;
return;
}
}
else if (this->lba < this->toc.tracks[this->index].start)
{
if (this->index > 0)
{
this->index--;
this->lba = this->toc.tracks[this->index].end;
}
else
{
this->lba = 0;
}
}
this->isData = this->toc.tracks[this->index].type;
if (this->toc.sub)
{
fseek(this->toc.sub, this->lba * 96, SEEK_SET);
}
if (this->toc.tracks[this->index].type)
{
// DATA track
fseek(this->toc.tracks[0].fd, this->lba * this->sectorSize, SEEK_SET);
}
else if (this->toc.tracks[this->index].fd)
{
// AUDIO track
fseek(this->toc.tracks[this->index].fd, (this->lba * 2352) - this->toc.tracks[this->index].offset, SEEK_SET);
}
}
}
void cdd_t::CommandExec() {
msf_t msf;
switch (comm[0]) {
case CD_COMM_IDLE:
stat[0] = this->status;
if (stat[1] == 0x0f)
{
if (!this->latency)
{
stat[0] = this->status;
stat[1] = 0x2;
stat[2] = (cdd.index < this->toc.last) ? BCD(this->index + 1) >> 4 : 0xA;
stat[3] = (cdd.index < this->toc.last) ? BCD(this->index + 1) & 0xF : 0xA;
}
}
//printf("MCD: Command IDLE, status = %u\n\x1b[0m", this->status);
break;
case CD_COMM_STOP:
this->status = CD_STAT_STOP;
this->isData = 1;
stat[0] = this->status;
stat[1] = 0;
stat[2] = 0;
stat[3] = 0;
stat[4] = 0;
stat[5] = 0;
stat[6] = 0;
stat[7] = 0;
stat[8] = 0;
//printf("\x1b[32mMCD: Command STOP, status = %u, frame = %u\n\x1b[0m", this->status, frame);
break;
case CD_COMM_TOC:
switch (comm[3]) {
case 0: {
int lba_ = this->lba + 150;
LBAToMSF(lba_, &msf);
stat[0] = this->status;
stat[1] = 0x0;
stat[2] = BCD(msf.m) >> 4;
stat[3] = BCD(msf.m) & 0xF;
stat[4] = BCD(msf.s) >> 4;
stat[5] = BCD(msf.s) & 0xF;
stat[6] = BCD(msf.f) >> 4;
stat[7] = BCD(msf.f) & 0xF;
stat[8] = this->toc.tracks[this->index].type << 2;
//printf("\x1b[32mMCD: Command TOC 0, lba = %i, command = %02X%02X%02X%02X%02X%02X%02X%02X%02X%02X, status = %02X%08X, frame = %u\n\x1b[0m", lba, comm[9], comm[8], comm[7], comm[6], comm[5], comm[4], comm[3], comm[2], comm[1], comm[0], (uint32_t)(GetStatus() >> 32), (uint32_t)GetStatus(), frame);
}
break;
case 1: {
int lba_ = abs(this->lba - this->toc.tracks[this->index].start);
LBAToMSF(lba_, &msf);
stat[0] = this->status;
stat[1] = 0x1;
stat[2] = BCD(msf.m) >> 4;
stat[3] = BCD(msf.m) & 0xF;
stat[4] = BCD(msf.s) >> 4;
stat[5] = BCD(msf.s) & 0xF;
stat[6] = BCD(msf.f) >> 4;
stat[7] = BCD(msf.f) & 0xF;
stat[8] = this->toc.tracks[this->index].type << 2;
//printf("\x1b[32mMCD: Command TOC 1, lba = %i, command = %02X%02X%02X%02X%02X%02X%02X%02X%02X%02X, status = %02X%08X, frame = %u\n\x1b[0m", lba, comm[9], comm[8], comm[7], comm[6], comm[5], comm[4], comm[3], comm[2], comm[1], comm[0], (uint32_t)(GetStatus() >> 32), (uint32_t)GetStatus(), frame);
}
break;
case 2: {
stat[0] = this->status;
stat[1] = 0x2;
stat[2] = ((this->index < this->toc.last) ? BCD(this->index + 1) >> 4 : 0xA);
stat[3] = ((this->index < this->toc.last) ? BCD(this->index + 1) & 0xF : 0xA);
stat[4] = 0;
stat[5] = 0;
stat[6] = 0;
stat[7] = 0;
stat[8] = 0;
//printf("\x1b[32mMCD: Command TOC 2, index = %i, command = %02X%02X%02X%02X%02X%02X%02X%02X%02X%02X, status = %02X%08X, frame = %u\n\x1b[0m", this->index, comm[9], comm[8], comm[7], comm[6], comm[5], comm[4], comm[3], comm[2], comm[1], comm[0], (uint32_t)(GetStatus() >> 32), (uint32_t)GetStatus(), frame);
}
break;
case 3: {
int lba_ = this->toc.end + 150;
LBAToMSF(lba_, &msf);
stat[0] = this->status;
stat[1] = 0x3;
stat[2] = BCD(msf.m) >> 4;
stat[3] = BCD(msf.m) & 0xF;
stat[4] = BCD(msf.s) >> 4;
stat[5] = BCD(msf.s) & 0xF;
stat[6] = BCD(msf.f) >> 4;
stat[7] = BCD(msf.f) & 0xF;
stat[8] = 0;
//printf("\x1b[32mMCD: Command TOC 3, lba = %i, command = %02X%02X%02X%02X%02X%02X%02X%02X%02X%02X, frame = %u\n\x1b[0m", lba, comm[9], comm[8], comm[7], comm[6], comm[5], comm[4], comm[3], comm[2], comm[1], comm[0], frame);
}
break;
case 4: {
stat[0] = this->status;
stat[1] = 0x4;
stat[2] = 0;
stat[3] = 1;
stat[4] = BCD(this->toc.last) >> 4;
stat[5] = BCD(this->toc.last) & 0xF;
stat[6] = 0;
stat[7] = 0;
stat[8] = 0;
//printf("\x1b[32mMCD: Command TOC 4, last = %i, command = %02X%02X%02X%02X%02X%02X%02X%02X%02X%02X, frame = %u\n\x1b[0m", this->toc.last, comm[9], comm[8], comm[7], comm[6], comm[5], comm[4], comm[3], comm[2], comm[1], comm[0], frame);
}
break;
case 5: {
int track = comm[4] * 10 + comm[5];
int lba_ = this->toc.tracks[track - 1].start + 150;
LBAToMSF(lba_, &msf);
stat[0] = this->status;
stat[1] = 0x5;
stat[2] = BCD(msf.m) >> 4;
stat[3] = BCD(msf.m) & 0xF;
stat[4] = BCD(msf.s) >> 4;
stat[5] = BCD(msf.s) & 0xF;
stat[6] = (BCD(msf.f) >> 4) | (this->toc.tracks[track - 1].type << 3);
stat[7] = BCD(msf.f) & 0xF;
stat[8] = BCD(track) & 0xF;
//printf("\x1b[32mMCD: Command TOC 5, lba = %i, track = %i, command = %02X%02X%02X%02X%02X%02X%02X%02X%02X%02X, frame = %u\n\x1b[0m", lba_, track, comm[9], comm[8], comm[7], comm[6], comm[5], comm[4], comm[3], comm[2], comm[1], comm[0], frame);
}
break;
case 6:
stat[0] = this->status;
stat[1] = 0x6;
stat[2] = 0;
stat[3] = 0;
stat[4] = 0;
stat[5] = 0;
stat[6] = 0;
stat[7] = 0;
stat[8] = 0;
break;
default:
break;
}
break;
case CD_COMM_PLAY: {
int index = 0;
int lba_;
MSFToLBA(&lba_, comm[2] * 10 + comm[3], comm[4] * 10 + comm[5], comm[6] * 10 + comm[7]);
lba_ -= 150;
if (!this->latency)
{
this->latency = 11;
}
this->latency += abs(((lba_ - this->lba) * 120) / 270000);
this->lba = lba_;
while ((this->toc.tracks[index].end <= lba_) && (index < this->toc.last)) index++;
this->index = index;
if (lba_ < this->toc.tracks[index].start)
{
lba_ = this->toc.tracks[index].start;
}
if (this->toc.tracks[index].type)
{
/* DATA track */
fseek(this->toc.tracks[0].fd, lba_ * this->sectorSize, SEEK_SET);
}
else if (cdd.toc.tracks[index].fd)
{
/* PCM AUDIO track */
fseek(this->toc.tracks[index].fd, (lba_ * 2352) - this->toc.tracks[index].offset, SEEK_SET);
}
this->audioOffset = 0;
if (this->toc.sub)
{
fseek(this->toc.sub, lba_ * 96, SEEK_SET);
}
this->isData = 1;
this->status = CD_STAT_PLAY;
stat[0] = this->status;
stat[1] = 0xf;
stat[2] = 0;
stat[3] = 0;
stat[4] = 0;
stat[5] = 0;
stat[6] = 0;
stat[7] = 0;
stat[8] = 0;
//printf("\x1b[32mMCD: Command PLAY, lba = %i, index = %i, command = %02X%02X%02X%02X%02X%02X%02X%02X%02X%02X, frame = %u\n\x1b[0m", lba_, this->index, comm[9], comm[8], comm[7], comm[6], comm[5], comm[4], comm[3], comm[2], comm[1], comm[0], frame);
}
break;
case CD_COMM_SEEK: {
int index = 0;
int lba_;
MSFToLBA(&lba_, comm[2] * 10 + comm[3], comm[4] * 10 + comm[5], comm[6] * 10 + comm[7]);
lba_ -= 150;
this->latency = abs((lba_ - this->lba) * 120) / 270000;
this->lba = lba_;
while ((this->toc.tracks[index].end <= lba_) && (index < this->toc.last)) index++;
this->index = index;
if (lba_ < this->toc.tracks[index].start)
{
lba_ = this->toc.tracks[index].start;
}
if (this->toc.tracks[index].type)
{
// DATA track
fseek(this->toc.tracks[0].fd, lba_ * this->sectorSize, SEEK_SET);
}
else if (this->toc.tracks[index].fd)
{
// AUDIO track
fseek(this->toc.tracks[index].fd, (lba_ * 2352) - this->toc.tracks[index].offset, SEEK_SET);
}
//this->audioOffset = 0;
if (this->toc.sub)
{
fseek(this->toc.sub, lba_ * 96, SEEK_SET);
}
this->isData = 1;
this->status = CD_STAT_SEEK;
stat[0] = this->status;
stat[1] = 0xf;
stat[2] = 0;
stat[3] = 0;
stat[4] = 0;
stat[5] = 0;
stat[6] = 0;
stat[7] = 0;
stat[8] = 0;
//printf("\x1b[32mMCD: Command PLAY, lba = %i, index = %i, command = %02X%02X%02X%02X%02X%02X%02X%02X%02X%02X, frame = %u\n\x1b[0m", lba_, this->index, comm[9], comm[8], comm[7], comm[6], comm[5], comm[4], comm[3], comm[2], comm[1], comm[0], frame);
}
break;
case CD_COMM_PAUSE:
this->isData = 0x01;
this->status = CD_STAT_PAUSE;
stat[0] = this->status;
//printf("\x1b[32mMCD: Command PAUSE, status = %X, frame = %u\n\x1b[0m", this->status, frame);
break;
case CD_COMM_RESUME:
this->status = CD_STAT_PLAY;
stat[0] = this->status;
this->audioOffset = 0;
printf("\x1b[32mMCD: Command RESUME, status = %X, frame = %u\n\x1b[0m", this->status, frame);
break;
case CD_COMM_FW_SCAN:
this->scanOffset = CD_SCAN_SPEED;
this->status = CD_STAT_SCAN;
stat[0] = this->status;
break;
case CD_COMM_RW_SCAN:
this->scanOffset = -CD_SCAN_SPEED;
this->status = CD_STAT_SCAN;
stat[0] = this->status;
break;
case CD_COMM_TRACK_MOVE:
this->isData = 1;
this->status = CD_STAT_PAUSE;
stat[0] = this->status;
break;
case CD_COMM_TRAY_CLOSE:
this->isData = 1;
this->status = this->loaded ? CD_STAT_TOC : CD_STAT_NO_DISC;
stat[0] = CD_STAT_STOP;
//printf("\x1b[32mMCD: Command TRAY_CLOSE, status = %u, frame = %u\n\x1b[0m", this->status, frame);
break;
case CD_COMM_TRAY_OPEN:
this->isData = 1;
this->status = CD_STAT_OPEN;
stat[0] = CD_STAT_OPEN;
//printf("\x1b[32mMCD: Command TRAY_OPEN, status = %u, frame = %u\n\x1b[0m", this->status, frame);
break;
default:
stat[0] = this->status;
//printf("\x1b[32mMCD: Command undefined, status = %u, frame = %u\n\x1b[0m", this->status, frame);
break;
}
}
uint64_t cdd_t::GetStatus() {
uint8_t n9 = ~(stat[0] + stat[1] + stat[2] + stat[3] + stat[4] + stat[5] + stat[6] + stat[7] + stat[8]);
return ((uint64_t)(n9 & 0xF) << 36) |
((uint64_t)(stat[8] & 0xF) << 32) |
((uint64_t)(stat[7] & 0xF) << 28) |
((uint64_t)(stat[6] & 0xF) << 24) |
((uint64_t)(stat[5] & 0xF) << 20) |
((uint64_t)(stat[4] & 0xF) << 16) |
((uint64_t)(stat[3] & 0xF) << 12) |
((uint64_t)(stat[2] & 0xF) << 8) |
((uint64_t)(stat[1] & 0xF) << 4) |
((uint64_t)(stat[0] & 0xF) << 0);
}
int cdd_t::SetCommand(uint64_t c) {
comm[0] = (c >> 0) & 0xF;
comm[1] = (c >> 4) & 0xF;
comm[2] = (c >> 8) & 0xF;
comm[3] = (c >> 12) & 0xF;
comm[4] = (c >> 16) & 0xF;
comm[5] = (c >> 20) & 0xF;
comm[6] = (c >> 24) & 0xF;
comm[7] = (c >> 28) & 0xF;
comm[8] = (c >> 32) & 0xF;
comm[9] = (c >> 36) & 0xF;
uint8_t crc = (~(comm[0] + comm[1] + comm[2] + comm[3] + comm[4] + comm[5] + comm[6] + comm[7] + comm[8])) & 0xF;
if (comm[9] != crc)
return -1;
return 0;
}
void cdd_t::LBAToMSF(int lba, msf_t* msf) {
msf->m = (lba / 75) / 60;
msf->s = (lba / 75) % 60;
msf->f = (lba % 75);
}
void cdd_t::MSFToLBA(int* lba, uint8_t m, uint8_t s, uint8_t f) {
*lba = f + s * 75 + m * 60 * 75;
}
void cdd_t::MSFToLBA(int* lba, msf_t* msf) {
*lba = msf->f + msf->s * 75 + msf->m * 60 * 75;
}
void cdd_t::ReadData(uint8_t *buf)
{
if (this->toc.tracks[this->index].type && (this->lba >= 0))
{
if (this->sectorSize == 2048)
{
fseek(this->toc.tracks[0].fd, this->lba * 2048, SEEK_SET);
}
else
{
fseek(this->toc.tracks[0].fd, this->lba * 2352 + 16, SEEK_SET);
}
fread(buf, 2048, 1, this->toc.tracks[0].fd);
}
}
int cdd_t::ReadCDDA(uint8_t *buf)
{
this->audioLength = 2352 + 2352 - this->audioOffset;
this->audioOffset = 2352;
if (!this->isData && this->toc.tracks[this->index].fd)
{
fread(buf, this->audioLength, 1, this->toc.tracks[this->index].fd);
}
return this->audioLength;
}
void cdd_t::ReadSubcode(uint16_t* buf)
{
uint8_t subc[96];
int i, j, n;
fread(subc, 96, 1, this->toc.sub);
for (i = 0, n = 0; i < 96; i += 2, n++)
{
int code = 0;
for (j = 0; j < 8; j++)
{
int bits = (subc[(j * 12) + (i / 8)] >> (6 - (i & 6))) & 3;
code |= ((bits & 1) << (7 - j));
code |= ((bits >> 1) << (15 - j));
}
buf[n] = code;
}
}

219
support/megacd/megacd.cpp Normal file
View File

@@ -0,0 +1,219 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include "../../file_io.h"
#include "../../user_io.h"
#include "../../spi.h"
#include "../../hardware.h"
#include "megacd.h"
int loaded = 0, unloaded = 0;
static uint8_t has_command = 0;
void mcd_poll()
{
static uint32_t poll_timer = 0, stat_timer = 0;
static uint8_t last_req = 255;
static uint8_t adj = 0;
if (!stat_timer || CheckTimer(stat_timer))
{
stat_timer = GetTimer(15);
if (has_command) {
spi_uio_cmd_cont(UIO_CD_SET);
uint64_t s = cdd.GetStatus();
spi_w((s >> 0) & 0xFFFF);
spi_w((s >> 16) & 0xFFFF);
spi_w(((s >> 32) & 0x00FF) | (cdd.isData ? 0x01 << 8 : 0x00 << 8));
DisableIO();
has_command = 0;
//printf("\x1b[32mMCD: Send status, status = %04X%04X%04X, frame = %u\n\x1b[0m", (uint16_t)((s >> 32) & 0x00FF), (uint16_t)((s >> 16) & 0xFFFF), (uint16_t)((s >> 0) & 0xFFFF), frame);
}
}
uint8_t req = spi_uio_cmd_cont(UIO_CD_GET);
if (req != last_req)
{
last_req = req;
uint16_t data_in[4];
data_in[0] = spi_w(0);
data_in[1] = spi_w(0);
data_in[2] = spi_w(0);
DisableIO();
uint64_t c = *((uint64_t*)(data_in));
cdd.SetCommand(c);
cdd.CommandExec();
has_command = 1;
//printf("\x1b[32mMCD: Get command, command = %04X%04X%04X, has_command = %u\n\x1b[0m", data_in[2], data_in[1], data_in[0], has_command);
}
else
DisableIO();
if (!poll_timer || CheckTimer(poll_timer))
{
poll_timer = GetTimer(13 + (!adj ? 1 : 0));
if (++adj >= 3) adj = 0;
cdd.Update();
}
//static uint8_t state = 0;
//
//if (!poll_timer || CheckTimer(poll_timer))
//{
// if (!state) {
// poll_timer = GetTimer(5 + (!adj ? 1 : 0));
// if (++adj >= 4) adj = 0;
// if (has_command) {
// uint64_t s = cdd.GetStatus();
// spi_uio_cmd_cont(UIO_CD_SET);
// spi_w((s >> 0) & 0xFFFF);
// spi_w((s >> 16) & 0xFFFF);
// spi_w(((s >> 32) & 0x00FF) | (cdd.isData ? 0x01 << 8 : 0x00 << 8));
// DisableIO();
// //printf("\x1b[32mMCD: Send status, status = %02X%08X, frame = %u\n\x1b[0m", (uint32_t)(status >> 32), (uint32_t)status, frame);
// }
// frame++;
// }
// else {
// poll_timer = GetTimer(8);
// cdd.Update();
// uint16_t data_in[4];
// uint8_t req = spi_uio_cmd_cont(UIO_CD_GET);
// //get the data from FPGA
// data_in[0] = spi_w(0);
// data_in[1] = spi_w(0);
// data_in[2] = spi_w(0);
// DisableIO();
// has_command = 0;
// if (req != last_req)
// {
// last_req = req;
// uint64_t c = *((uint64_t*)(data_in));
// cdd.CommandExec(c);
// has_command = 1;
// //printf("\x1b[32mMCD: Receive command, command = %02X%08X, frame = %u\n\x1b[0m", (uint32_t)(c >> 32), (uint32_t)c, frame);
// }
// }
// state = ~state;
//}
}
void mcd_set_image(int num, const char *filename)
{
(void)num;
if (*filename) {
if (cdd.Load(filename) > 0) {
loaded = 1;
cdd.status = cdd.loaded ? CD_STAT_STOP : CD_STAT_NO_DISC;
cdd.latency = 10;
//status = MakeStatus(CD_STAT_STOP, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0);
}
else {
cdd.status = CD_STAT_NO_DISC;
}
}
else {
cdd.Unload();
unloaded = 1;
cdd.status = CD_STAT_OPEN;
}
}
int cdd_t::SectorSend(uint8_t* header)
{
uint8_t buf[2352+2352];
int len = 2352;
if (header) {
memcpy(buf + 12, header, 4);
ReadData(buf + 16);
}
else {
len = ReadCDDA(buf);
}
// set index byte
user_io_set_index(CD_DATA_IO_INDEX);
// prepare transmission of new file
EnableFpga();
spi8(UIO_FILE_TX);
spi8(0xff);
DisableFpga();
EnableFpga();
spi8(UIO_FILE_TX_DAT);
spi_write(buf, len, 1);
DisableFpga();
// signal end of transmission
EnableFpga();
spi8(UIO_FILE_TX);
spi8(0x00);
DisableFpga();
return 1;
}
int cdd_t::SubcodeSend()
{
uint16_t buf[98/2];
ReadSubcode(buf);
// set index byte
user_io_set_index(CD_SUB_IO_INDEX);
// prepare transmission of new file
EnableFpga();
spi8(UIO_FILE_TX);
spi8(0xff);
DisableFpga();
EnableFpga();
spi8(UIO_FILE_TX_DAT);
spi_write((uint8_t*)buf, 98, 1);
DisableFpga();
// signal end of transmission
EnableFpga();
spi8(UIO_FILE_TX);
spi8(0x00);
DisableFpga();
return 1;
}

120
support/megacd/megacd.h Normal file
View File

@@ -0,0 +1,120 @@
#ifndef MEGACD_H
#define MEGACD_H
// CDD status
#define CD_STAT_STOP 0x00
#define CD_STAT_PLAY 0x01
#define CD_STAT_SEEK 0x02
#define CD_STAT_SCAN 0x03
#define CD_STAT_PAUSE 0x04
#define CD_STAT_OPEN 0x05
#define CD_STAT_NO_VALID_CHK 0x06
#define CD_STAT_NO_VALID_CMD 0x07
#define CD_STAT_ERROR 0x08
#define CD_STAT_TOC 0x09
#define CD_STAT_TRACK_MOVE 0x0A
#define CD_STAT_NO_DISC 0x0B
#define CD_STAT_END 0x0C
#define CD_STAT_TRAY 0x0E
#define CD_STAT_TEST 0x0F
// CDD command
#define CD_COMM_IDLE 0x00
#define CD_COMM_STOP 0x01
#define CD_COMM_TOC 0x02
#define CD_COMM_PLAY 0x03
#define CD_COMM_SEEK 0x04
//#define CD_COMM_OPEN 0x05
#define CD_COMM_PAUSE 0x06
#define CD_COMM_RESUME 0x07
#define CD_COMM_FW_SCAN 0x08
#define CD_COMM_RW_SCAN 0x09
#define CD_COMM_TRACK_MOVE 0x0A
//#define CD_COMM_NO_DISC 0x0B
#define CD_COMM_TRAY_CLOSE 0x0C
#define CD_COMM_TRAY_OPEN 0x0D
typedef struct
{
FILE *fd;
int offset;
int start;
int end;
int type;
} track_t;
typedef struct
{
int end;
int last;
track_t tracks[100];
FILE *sub;
} toc_t;
typedef struct
{
uint8_t m;
uint8_t s;
uint8_t f;
} msf_t;
class cdd_t
{
public:
uint32_t latency;
uint8_t status;
uint8_t isData;
int loaded;
cdd_t();
int Load(const char *filename);
void Unload();
void Update();
void CommandExec();
int SectorSend(uint8_t* header);
int SubcodeSend();
uint64_t GetStatus();
int SetCommand(uint64_t c);
private:
toc_t toc;
int index;
int lba;
uint32_t cycles;
int type;
uint16_t sectorSize;
int scanOffset;
int audioLength;
int audioOffset;
uint8_t stat[10];
uint8_t comm[10];
int LoadCUE(const char* filename);
void ReadData(uint8_t *buf);
int ReadCDDA(uint8_t *buf);
void ReadSubcode(uint16_t* buf);
void LBAToMSF(int lba, msf_t* msf);
void MSFToLBA(int* lba, msf_t* msf);
void MSFToLBA(int* lba, uint8_t m, uint8_t s, uint8_t f);
};
#define BCD(v) ((uint8_t)((((v)/10) << 4) | ((v)%10)))
#define CD_SCAN_SPEED 30
#define CD_DATA_IO_INDEX 2
#define CD_SUB_IO_INDEX 3
//cdd.cpp
extern cdd_t cdd;
extern uint32_t frame;
void mcd_poll();
void mcd_set_image(int num, const char *filename);
#endif

11
user_io.cpp
View File

@@ -294,6 +294,13 @@ char is_minimig()
return (is_minimig_type == 1);
}
static int is_megacd_type = 0;
char is_megacd_core()
{
if (!is_megacd_type) is_megacd_type = strcasecmp(core_name, "MEGACD") ? 2 : 1;
return (is_megacd_type == 1);
}
static int is_no_type = 0;
static int disable_osd = 0;
char has_menu()
@@ -1826,6 +1833,8 @@ void user_io_send_buttons(char force)
minimig_reset();
}
if (is_megacd_core()) mcd_set_image(0, "");
key_map = map;
spi_uio_cmd16(UIO_BUT_SW, map);
printf("sending keymap: %X\n", map);
@@ -2835,6 +2844,8 @@ void user_io_poll()
fpga_set_led(0);
diskled_is_on = 0;
}
if (is_megacd_core()) mcd_poll();
}
static void send_keycode(unsigned short key, int press)

3
user_io.h
View File

@@ -72,6 +72,8 @@
#define UIO_SET_MEMSZ 0x31 // Send memory size to the core
#define UIO_SET_GAMMA 0x32 // Enable/disable Gamma correction
#define UIO_SET_GAMCURV 0x33 // Set Gamma curve
#define UIO_CD_GET 0x34
#define UIO_CD_SET 0x35
// codes as used by 8bit for file loading from OSD
#define UIO_FILE_TX 0x53
@@ -214,6 +216,7 @@ char *user_io_make_filepath(const char *path, const char *filename);
char *user_io_get_core_name();
char *user_io_get_core_path();
const char *user_io_get_core_name_ex();
char is_megacd_core();
char has_menu();
const char *get_image_name(int i);