mirror of
https://github.com/RaySollium99/picodrive.git
synced 2025-09-05 15:27:46 -04:00
move ROM detect code to pico/
This commit is contained in:
notaz
parent
2656e68083
commit
4c2e35547f
8 changed files with 400 additions and 321 deletions
|
|
@ -8,6 +8,7 @@
|
|||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <stdarg.h>
|
||||
#ifndef NO_SYNC
|
||||
#include <unistd.h>
|
||||
|
|
@ -26,7 +27,6 @@
|
|||
|
||||
#include <pico/pico_int.h>
|
||||
#include <pico/patch.h>
|
||||
#include <pico/cd/cue.h>
|
||||
|
||||
|
||||
#define STATUS_MSG_TIMEOUT 2000
|
||||
|
|
@ -52,7 +52,6 @@ static short __attribute__((aligned(4))) sndBuffer[2*44100/50];
|
|||
static char static_buff[512];
|
||||
const char *rom_fname_reload;
|
||||
char rom_fname_loaded[512];
|
||||
int rom_loaded = 0;
|
||||
int reset_timing = 0;
|
||||
static unsigned int notice_msg_time; /* when started showing */
|
||||
static char noticeMsg[40];
|
||||
|
|
@ -149,19 +148,30 @@ static const char * const biosfiles_us[] = { "us_scd1_9210", "us_scd2_9306", "Se
|
|||
static const char * const biosfiles_eu[] = { "eu_mcd1_9210", "eu_mcd2_9306", "eu_mcd2_9303" };
|
||||
static const char * const biosfiles_jp[] = { "jp_mcd1_9112", "jp_mcd1_9111" };
|
||||
|
||||
static int find_bios(int region, const char **bios_file)
|
||||
static const char *find_bios(int *region, const char *cd_fname)
|
||||
{
|
||||
int i, count;
|
||||
const char * const *files;
|
||||
FILE *f = NULL;
|
||||
int ret;
|
||||
|
||||
if (region == 4) { // US
|
||||
// we need to have config loaded at this point
|
||||
ret = emu_read_config(cd_fname, 0);
|
||||
if (!ret) emu_read_config(NULL, 0);
|
||||
|
||||
if (PicoRegionOverride) {
|
||||
*region = PicoRegionOverride;
|
||||
lprintf("override region to %s\n", *region != 4 ?
|
||||
(*region == 8 ? "EU" : "JAP") : "USA");
|
||||
}
|
||||
|
||||
if (*region == 4) { // US
|
||||
files = biosfiles_us;
|
||||
count = sizeof(biosfiles_us) / sizeof(char *);
|
||||
} else if (region == 8) { // EU
|
||||
} else if (*region == 8) { // EU
|
||||
files = biosfiles_eu;
|
||||
count = sizeof(biosfiles_eu) / sizeof(char *);
|
||||
} else if (region == 1 || region == 2) {
|
||||
} else if (*region == 1 || *region == 2) {
|
||||
files = biosfiles_jp;
|
||||
count = sizeof(biosfiles_jp) / sizeof(char *);
|
||||
} else {
|
||||
|
|
@ -184,14 +194,12 @@ static int find_bios(int region, const char **bios_file)
|
|||
if (f) {
|
||||
lprintf("using bios: %s\n", static_buff);
|
||||
fclose(f);
|
||||
if (bios_file)
|
||||
*bios_file = static_buff;
|
||||
return 1;
|
||||
return static_buff;
|
||||
} else {
|
||||
sprintf(static_buff, "no %s BIOS files found, read docs",
|
||||
region != 4 ? (region == 8 ? "EU" : "JAP") : "USA");
|
||||
*region != 4 ? (*region == 8 ? "EU" : "JAP") : "USA");
|
||||
menu_update_msg(static_buff);
|
||||
return 0;
|
||||
return NULL;
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -210,166 +218,6 @@ static int emu_isBios(const char *name)
|
|||
}
|
||||
*/
|
||||
|
||||
static unsigned char id_header[0x100];
|
||||
|
||||
/* checks if fname points to valid MegaCD image */
|
||||
static int emu_cd_check(int *pregion, const char *fname_in)
|
||||
{
|
||||
const char *fname = fname_in;
|
||||
unsigned char buf[32];
|
||||
pm_file *cd_f;
|
||||
int region = 4; // 1: Japan, 4: US, 8: Europe
|
||||
char ext[5];
|
||||
cue_track_type type = CT_UNKNOWN;
|
||||
cue_data_t *cue_data = NULL;
|
||||
|
||||
get_ext(fname_in, ext);
|
||||
if (strcasecmp(ext, ".cue") == 0) {
|
||||
cue_data = cue_parse(fname_in);
|
||||
if (cue_data != NULL) {
|
||||
fname = cue_data->tracks[1].fname;
|
||||
type = cue_data->tracks[1].type;
|
||||
}
|
||||
else
|
||||
return -1;
|
||||
}
|
||||
|
||||
cd_f = pm_open(fname);
|
||||
if (cue_data != NULL)
|
||||
cue_destroy(cue_data);
|
||||
|
||||
if (cd_f == NULL) return 0; // let the upper level handle this
|
||||
|
||||
if (pm_read(buf, 32, cd_f) != 32) {
|
||||
pm_close(cd_f);
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (!strncasecmp("SEGADISCSYSTEM", (char *)buf+0x00, 14)) {
|
||||
if (type && type != CT_ISO)
|
||||
elprintf(EL_STATUS, ".cue has wrong type: %i", type);
|
||||
type = CT_ISO; // Sega CD (ISO)
|
||||
}
|
||||
if (!strncasecmp("SEGADISCSYSTEM", (char *)buf+0x10, 14)) {
|
||||
if (type && type != CT_BIN)
|
||||
elprintf(EL_STATUS, ".cue has wrong type: %i", type);
|
||||
type = CT_BIN; // Sega CD (BIN)
|
||||
}
|
||||
|
||||
if (type == CT_UNKNOWN) {
|
||||
pm_close(cd_f);
|
||||
return 0;
|
||||
}
|
||||
|
||||
pm_seek(cd_f, (type == CT_ISO) ? 0x100 : 0x110, SEEK_SET);
|
||||
pm_read(id_header, sizeof(id_header), cd_f);
|
||||
|
||||
/* it seems we have a CD image here. Try to detect region now.. */
|
||||
pm_seek(cd_f, (type == CT_ISO) ? 0x100+0x10B : 0x110+0x10B, SEEK_SET);
|
||||
pm_read(buf, 1, cd_f);
|
||||
pm_close(cd_f);
|
||||
|
||||
if (buf[0] == 0x64) region = 8; // EU
|
||||
if (buf[0] == 0xa1) region = 1; // JAP
|
||||
|
||||
lprintf("detected %s Sega/Mega CD image with %s region\n",
|
||||
type == CT_BIN ? "BIN" : "ISO", region != 4 ? (region == 8 ? "EU" : "JAP") : "USA");
|
||||
|
||||
if (pregion != NULL) *pregion = region;
|
||||
|
||||
return type;
|
||||
}
|
||||
|
||||
static int detect_media(const char *fname)
|
||||
{
|
||||
static const short sms_offsets[] = { 0x7ff0, 0x3ff0, 0x1ff0 };
|
||||
static const char *sms_exts[] = { "sms", "gg", "sg" };
|
||||
static const char *md_exts[] = { "gen", "bin", "smd" };
|
||||
char buff0[32], buff[32];
|
||||
unsigned short *d16;
|
||||
pm_file *pmf;
|
||||
char ext[5];
|
||||
int i;
|
||||
|
||||
get_ext(fname, ext);
|
||||
|
||||
// detect wrong extensions
|
||||
if (!strcmp(ext, ".srm") || !strcmp(ext, "s.gz") || !strcmp(ext, ".mds")) // s.gz ~ .mds.gz
|
||||
return PM_BAD;
|
||||
|
||||
/* don't believe in extensions, except .cue */
|
||||
if (strcasecmp(ext, ".cue") == 0)
|
||||
return PM_CD;
|
||||
|
||||
pmf = pm_open(fname);
|
||||
if (pmf == NULL)
|
||||
return PM_BAD;
|
||||
|
||||
if (pm_read(buff0, 32, pmf) != 32) {
|
||||
pm_close(pmf);
|
||||
return PM_BAD;
|
||||
}
|
||||
|
||||
if (strncasecmp("SEGADISCSYSTEM", buff0 + 0x00, 14) == 0 ||
|
||||
strncasecmp("SEGADISCSYSTEM", buff0 + 0x10, 14) == 0) {
|
||||
pm_close(pmf);
|
||||
return PM_CD;
|
||||
}
|
||||
|
||||
/* check for SMD evil */
|
||||
if (pmf->size >= 0x4200 && (pmf->size & 0x3fff) == 0x200) {
|
||||
if (pm_seek(pmf, sms_offsets[0] + 0x200, SEEK_SET) == sms_offsets[0] + 0x200 &&
|
||||
pm_read(buff, 16, pmf) == 16 &&
|
||||
strncmp("TMR SEGA", buff, 8) == 0)
|
||||
goto looks_like_sms;
|
||||
|
||||
/* could parse further but don't bother */
|
||||
goto extension_check;
|
||||
}
|
||||
|
||||
/* MD header? Act as TMSS BIOS here */
|
||||
if (pm_seek(pmf, 0x100, SEEK_SET) == 0x100 && pm_read(buff, 16, pmf) == 16) {
|
||||
if (strncmp(buff, "SEGA", 4) == 0 || strncmp(buff, " SEG", 4) == 0)
|
||||
goto looks_like_md;
|
||||
}
|
||||
|
||||
for (i = 0; i < array_size(sms_offsets); i++) {
|
||||
if (pm_seek(pmf, sms_offsets[i], SEEK_SET) != sms_offsets[i])
|
||||
continue;
|
||||
|
||||
if (pm_read(buff, 16, pmf) != 16)
|
||||
continue;
|
||||
|
||||
if (strncmp("TMR SEGA", buff, 8) == 0)
|
||||
goto looks_like_sms;
|
||||
}
|
||||
|
||||
extension_check:
|
||||
/* probably some headerless thing. Maybe check the extension after all. */
|
||||
for (i = 0; i < array_size(md_exts); i++)
|
||||
if (strcasecmp(pmf->ext, md_exts[i]) == 0)
|
||||
goto looks_like_md;
|
||||
|
||||
for (i = 0; i < array_size(sms_exts); i++)
|
||||
if (strcasecmp(pmf->ext, sms_exts[i]) == 0)
|
||||
goto looks_like_sms;
|
||||
|
||||
/* If everything else fails, make a guess on the reset vector */
|
||||
d16 = (unsigned short *)(buff0 + 4);
|
||||
if ((((d16[0] << 16) | d16[1]) & 0xffffff) >= pmf->size) {
|
||||
lprintf("bad MD reset vector, assuming SMS\n");
|
||||
goto looks_like_sms;
|
||||
}
|
||||
|
||||
looks_like_md:
|
||||
pm_close(pmf);
|
||||
return PM_MD_CART;
|
||||
|
||||
looks_like_sms:
|
||||
pm_close(pmf);
|
||||
return PM_MARK3;
|
||||
}
|
||||
|
||||
static int extract_text(char *dest, const unsigned char *src, int len, int swab)
|
||||
{
|
||||
char *p = dest;
|
||||
|
|
@ -416,11 +264,11 @@ static char *emu_make_rom_id(const char *fname)
|
|||
pos = 3;
|
||||
|
||||
if (!(PicoAHW & PAHW_SMS)) {
|
||||
pos += extract_text(id_string + pos, id_header + 0x80, 0x0e, swab); // serial
|
||||
pos += extract_text(id_string + pos, media_id_header + 0x80, 0x0e, swab); // serial
|
||||
id_string[pos] = '|'; pos++;
|
||||
pos += extract_text(id_string + pos, id_header + 0xf0, 0x03, swab); // region
|
||||
pos += extract_text(id_string + pos, media_id_header + 0xf0, 0x03, swab); // region
|
||||
id_string[pos] = '|'; pos++;
|
||||
pos += extract_text(id_string + pos, id_header + 0x50, 0x30, swab); // overseas name
|
||||
pos += extract_text(id_string + pos, media_id_header + 0x50, 0x30, swab); // overseas name
|
||||
id_string[pos] = 0;
|
||||
if (pos > 5)
|
||||
return id_string;
|
||||
|
|
@ -439,7 +287,7 @@ void emu_get_game_name(char *str150)
|
|||
int ret, swab = (PicoAHW & PAHW_MCD) ? 0 : 1;
|
||||
char *s, *d;
|
||||
|
||||
ret = extract_text(str150, id_header + 0x50, 0x30, swab); // overseas name
|
||||
ret = extract_text(str150, media_id_header + 0x50, 0x30, swab); // overseas name
|
||||
|
||||
for (s = d = str150 + 1; s < str150+ret; s++)
|
||||
{
|
||||
|
|
@ -450,13 +298,6 @@ void emu_get_game_name(char *str150)
|
|||
*d = 0;
|
||||
}
|
||||
|
||||
static void shutdown_MCD(void)
|
||||
{
|
||||
if ((PicoAHW & PAHW_MCD) && Pico_mcd != NULL)
|
||||
Stop_CD();
|
||||
PicoAHW &= ~PAHW_MCD;
|
||||
}
|
||||
|
||||
static void system_announce(void)
|
||||
{
|
||||
const char *sys_name, *tv_standard, *extra = "";
|
||||
|
|
@ -486,19 +327,20 @@ static void system_announce(void)
|
|||
emu_status_msg("%s %s / %dFPS%s", tv_standard, sys_name, fps, extra);
|
||||
}
|
||||
|
||||
// XXX: portions of this code should move to pico/
|
||||
static void do_region_override(const char *media_fname)
|
||||
{
|
||||
// we only need to override region if config tells us so
|
||||
int ret = emu_read_config(media_fname, 0);
|
||||
if (!ret) emu_read_config(NULL, 0);
|
||||
}
|
||||
|
||||
int emu_reload_rom(const char *rom_fname_in)
|
||||
{
|
||||
unsigned int rom_size = 0;
|
||||
const char *used_rom_name = NULL;
|
||||
char *rom_fname = NULL;
|
||||
unsigned char *rom_data = NULL;
|
||||
char ext[5];
|
||||
pm_file *rom = NULL;
|
||||
int cd_state = CIT_NOT_CD;
|
||||
int ret, media_type, cd_region;
|
||||
int cfg_loaded = 0, bad_rom = 0;
|
||||
enum media_type_e media_type;
|
||||
int menu_romload_started = 0;
|
||||
char carthw_path[512];
|
||||
int retval = 0;
|
||||
|
||||
lprintf("emu_ReloadRom(%s)\n", rom_fname_in);
|
||||
|
|
@ -507,7 +349,6 @@ int emu_reload_rom(const char *rom_fname_in)
|
|||
if (rom_fname == NULL)
|
||||
return 0;
|
||||
|
||||
used_rom_name = rom_fname;
|
||||
get_ext(rom_fname, ext);
|
||||
|
||||
// early cleanup
|
||||
|
|
@ -566,110 +407,29 @@ int emu_reload_rom(const char *rom_fname_in)
|
|||
get_ext(rom_fname, ext);
|
||||
}
|
||||
|
||||
media_type = detect_media(rom_fname);
|
||||
if (media_type == PM_BAD) {
|
||||
menu_romload_prepare(rom_fname); // also CD load
|
||||
menu_romload_started = 1;
|
||||
|
||||
emu_make_path(carthw_path, "carthw.cfg", sizeof(carthw_path));
|
||||
|
||||
media_type = PicoLoadMedia(rom_fname, carthw_path,
|
||||
find_bios, do_region_override);
|
||||
|
||||
switch (media_type) {
|
||||
case PM_BAD_DETECT:
|
||||
menu_update_msg("Not a ROM/CD img selected.");
|
||||
goto out;
|
||||
}
|
||||
|
||||
shutdown_MCD();
|
||||
PicoCartUnload();
|
||||
rom_loaded = 0;
|
||||
|
||||
PicoAHW = 0;
|
||||
|
||||
if (media_type == PM_CD)
|
||||
{
|
||||
// check for MegaCD image
|
||||
cd_state = emu_cd_check(&cd_region, rom_fname);
|
||||
if (cd_state >= 0 && cd_state != CIT_NOT_CD)
|
||||
{
|
||||
// valid CD image, check for BIOS..
|
||||
|
||||
// we need to have config loaded at this point
|
||||
ret = emu_read_config(rom_fname, 0);
|
||||
if (!ret) emu_read_config(NULL, 0);
|
||||
cfg_loaded = 1;
|
||||
|
||||
if (PicoRegionOverride) {
|
||||
cd_region = PicoRegionOverride;
|
||||
lprintf("override region to %s\n", cd_region != 4 ?
|
||||
(cd_region == 8 ? "EU" : "JAP") : "USA");
|
||||
}
|
||||
if (!find_bios(cd_region, &used_rom_name))
|
||||
goto out;
|
||||
|
||||
get_ext(used_rom_name, ext);
|
||||
PicoAHW |= PAHW_MCD;
|
||||
}
|
||||
else {
|
||||
menu_update_msg("Invalid CD image");
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
else if (media_type == PM_MARK3) {
|
||||
lprintf("detected SMS ROM\n");
|
||||
PicoAHW = PAHW_SMS;
|
||||
}
|
||||
|
||||
rom = pm_open(used_rom_name);
|
||||
if (rom == NULL) {
|
||||
menu_update_msg("Failed to open ROM");
|
||||
case PM_BAD_CD:
|
||||
menu_update_msg("Invalid CD image");
|
||||
goto out;
|
||||
}
|
||||
|
||||
menu_romload_prepare(used_rom_name); // also CD load
|
||||
menu_romload_started = 1;
|
||||
used_rom_name = NULL; // uses static_buff
|
||||
|
||||
ret = PicoCartLoad(rom, &rom_data, &rom_size, (PicoAHW & PAHW_SMS) ? 1 : 0);
|
||||
pm_close(rom);
|
||||
if (ret != 0) {
|
||||
if (ret == 2) menu_update_msg("Out of memory");
|
||||
else if (ret == 3) menu_update_msg("Read failed");
|
||||
else menu_update_msg("PicoCartLoad() failed.");
|
||||
case PM_BAD_CD_NO_BIOS:
|
||||
// find_bios() prints a message
|
||||
goto out;
|
||||
}
|
||||
|
||||
// detect wrong files
|
||||
if (strncmp((char *)rom_data, "Pico", 4) == 0)
|
||||
bad_rom = 1;
|
||||
else if (!(PicoAHW & PAHW_SMS)) {
|
||||
unsigned short *d = (unsigned short *)(rom_data + 4);
|
||||
if ((((d[0] << 16) | d[1]) & 0xffffff) >= (int)rom_size) {
|
||||
lprintf("bad reset vector\n");
|
||||
bad_rom = 1;
|
||||
}
|
||||
}
|
||||
|
||||
if (bad_rom) {
|
||||
menu_update_msg("Bad ROM detected.");
|
||||
case PM_ERROR:
|
||||
menu_update_msg("Load error");
|
||||
goto out;
|
||||
}
|
||||
|
||||
// load config for this ROM (do this before insert to get correct region)
|
||||
if (!(PicoAHW & PAHW_MCD))
|
||||
memcpy(id_header, rom_data + 0x100, sizeof(id_header));
|
||||
if (!cfg_loaded) {
|
||||
ret = emu_read_config(rom_fname, 0);
|
||||
if (!ret) emu_read_config(NULL, 0);
|
||||
}
|
||||
|
||||
emu_make_path(static_buff, "carthw.cfg", sizeof(static_buff));
|
||||
if (PicoCartInsert(rom_data, rom_size, static_buff)) {
|
||||
menu_update_msg("Failed to load ROM.");
|
||||
goto out;
|
||||
}
|
||||
|
||||
// insert CD if it was detected
|
||||
if (cd_state != CIT_NOT_CD) {
|
||||
ret = Insert_CD(rom_fname, cd_state);
|
||||
if (ret != 0) {
|
||||
PicoCartUnload();
|
||||
rom_data = NULL; // freed by unload
|
||||
menu_update_msg("Insert_CD() failed, invalid CD image?");
|
||||
goto out;
|
||||
}
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
menu_romload_end();
|
||||
|
|
@ -707,7 +467,6 @@ int emu_reload_rom(const char *rom_fname_in)
|
|||
|
||||
strncpy(rom_fname_loaded, rom_fname, sizeof(rom_fname_loaded)-1);
|
||||
rom_fname_loaded[sizeof(rom_fname_loaded)-1] = 0;
|
||||
rom_loaded = 1;
|
||||
|
||||
// load SRAM for this ROM
|
||||
if (currentConfig.EmuOpt & EOPT_EN_SRAM)
|
||||
|
|
@ -715,8 +474,6 @@ int emu_reload_rom(const char *rom_fname_in)
|
|||
|
||||
retval = 1;
|
||||
out:
|
||||
if (retval == 0 && rom_data)
|
||||
free(rom_data);
|
||||
if (menu_romload_started)
|
||||
menu_romload_end();
|
||||
free(rom_fname);
|
||||
|
|
@ -728,7 +485,7 @@ int emu_swap_cd(const char *fname)
|
|||
cd_img_type cd_type;
|
||||
int ret = -1;
|
||||
|
||||
cd_type = emu_cd_check(NULL, fname);
|
||||
cd_type = PicoCdCheck(fname, NULL);
|
||||
if (cd_type != CIT_NOT_CD)
|
||||
ret = Insert_CD(fname, cd_type);
|
||||
if (ret != 0) {
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue