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12-in-1 + realtec mapper

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@374 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2008-03-07 19:05:37 +00:00
parent 89fea1e972
commit a12b1b29cc
5 changed files with 122 additions and 16 deletions
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100
Pico/carthw/carthw.c
View file

@ -1,6 +1,12 @@
/*
* should better do some pointer stuff here. But as none of these bankswitch
* while the game runs, memcpy will suffice.
*/
#include "../PicoInt.h"
/* 12-in-1 */
/* 12-in-1 and 4-in-1. Assuming 2MB ROMs here. */
static unsigned int carthw_12in1_read16(unsigned int a, int realsize)
{
// ??
@ -13,7 +19,11 @@ static void carthw_12in1_write8(unsigned int a, unsigned int d, int realsize)
int len;
if (a < 0xA13000 || a >= 0xA13040) {
elprintf(EL_ANOMALY, "12-in-1: unexpected write [%06x] %02x @ %06x", a, d, SekPc);
/* 4-in-1 has Real Deal Boxing, which uses serial eeprom,
* but I really doubt that pirate cart had it */
if (a != 0x200001)
elprintf(EL_ANOMALY, "12-in-1: unexpected write [%06x] %02x @ %06x", a, d, SekPc);
return;
}
a &= 0x3f; a <<= 16;
@ -23,7 +33,7 @@ static void carthw_12in1_write8(unsigned int a, unsigned int d, int realsize)
return;
}
memcpy(Pico.rom, Pico.rom + 0x200000 + a, len);
memcpy(Pico.rom, Pico.rom + Pico.romsize + a, len);
}
static void carthw_12in1_reset(void)
@ -37,16 +47,96 @@ void carthw_12in1_startup(void)
elprintf(EL_STATUS, "12-in-1 mapper detected");
tmp = realloc(Pico.rom, 0x200000 + 0x200000);
tmp = realloc(Pico.rom, Pico.romsize * 2);
if (tmp == NULL)
{
elprintf(EL_STATUS, "OOM");
return;
}
memcpy(Pico.rom + 0x200000, Pico.rom, 0x200000);
Pico.rom = tmp;
memcpy(Pico.rom + Pico.romsize, Pico.rom, Pico.romsize);
PicoRead16Hook = carthw_12in1_read16;
PicoWrite8Hook = carthw_12in1_write8;
PicoResetHook = carthw_12in1_reset;
}
/* Realtec, based on TascoDLX doc
* http://www.sharemation.com/TascoDLX/REALTEC%20Cart%20Mapper%20-%20description%20v1.txt
*/
static int realtec_bank = 0x80000000, realtec_size = 0x80000000;
static int realtec_romsize = 0;
static void carthw_realtec_write8(unsigned int a, unsigned int d, int realsize)
{
int i, bank_old = realtec_bank, size_old = realtec_size;
if (a == 0x400000)
{
realtec_bank &= 0x0e0000;
realtec_bank |= 0x300000 & (d << 19);
if (realtec_bank != bank_old)
elprintf(EL_ANOMALY, "write [%06x] %02x @ %06x", a, d, SekPc);
}
else if (a == 0x402000)
{
realtec_size = (d << 17) & 0x3e0000;
if (realtec_size != size_old)
elprintf(EL_ANOMALY, "write [%06x] %02x @ %06x", a, d, SekPc);
}
else if (a == 0x404000)
{
realtec_bank &= 0x300000;
realtec_bank |= 0x0e0000 & (d << 17);
if (realtec_bank != bank_old)
elprintf(EL_ANOMALY, "write [%06x] %02x @ %06x", a, d, SekPc);
}
else
elprintf(EL_ANOMALY, "realtec: unexpected write [%06x] %02x @ %06x", a, d, SekPc);
if (realtec_bank >= 0 && realtec_size >= 0 &&
(realtec_bank != bank_old || realtec_size != size_old))
{
elprintf(EL_ANOMALY, "realtec: new bank %06x, size %06x", realtec_bank, realtec_size, SekPc);
if (realtec_size > realtec_romsize - realtec_bank || realtec_bank >= realtec_romsize)
{
elprintf(EL_ANOMALY, "realtec: bank too large / out of range?");
return;
}
for (i = 0; i < 0x400000; i += realtec_size)
memcpy(Pico.rom + i, Pico.rom + 0x400000 + realtec_bank, realtec_size);
}
}
void carthw_realtec_reset(void)
{
int i;
/* map boot code */
for (i = 0; i < 0x400000; i += 0x2000)
memcpy(Pico.rom + i, Pico.rom + 0x400000 + realtec_romsize - 0x2000, 0x2000);
realtec_bank = realtec_size = 0x80000000;
}
void carthw_realtec_startup(void)
{
void *tmp;
elprintf(EL_STATUS, "Realtec mapper detected");
realtec_romsize = Pico.romsize;
Pico.romsize = 0x400000;
tmp = realloc(Pico.rom, 0x400000 + realtec_romsize);
if (tmp == NULL)
{
elprintf(EL_STATUS, "OOM");
return;
}
Pico.rom = tmp;
memcpy(Pico.rom + 0x400000, Pico.rom, realtec_romsize);
PicoWrite8Hook = carthw_realtec_write8;
PicoResetHook = carthw_realtec_reset;
}

4
Pico/carthw/carthw.h
View file

@ -17,6 +17,6 @@ unsigned int PicoSVPRead16(unsigned int a, int realsize);
void PicoSVPWrite8 (unsigned int a, unsigned int d, int realsize);
void PicoSVPWrite16(unsigned int a, unsigned int d, int realsize);
/* 12-in-1 */
/* misc */
void carthw_12in1_startup(void);
void carthw_realtec_startup(void);