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updated EEPROM code, gmv fixed

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@249 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2007-09-16 15:44:18 +00:00
parent 32826a1a22
commit 1dceadaee4
14 changed files with 306 additions and 170 deletions
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122
Pico/Cart.c
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@ -310,10 +310,18 @@ int PicoCartInsert(unsigned char *rom,unsigned int romsize)
if(rom != NULL)
*(unsigned long *)(rom+romsize) = 0xFFFE4EFA; // 4EFA FFFE byteswapped
SRam.resize=1;
Pico.rom=rom;
Pico.romsize=romsize;
// setup correct memory map for loaded ROM
if (PicoMCD & 1)
PicoMemSetupCD();
else PicoMemSetup();
PicoMemReset();
if (!(PicoMCD & 1))
PicoCartDetect();
return PicoReset(1);
}
@ -323,3 +331,115 @@ int PicoUnloadCart(unsigned char* romdata)
return 0;
}
static int name_cmp(const char *name)
{
int i, len = strlen(name);
const char *name_rom = (const char *)Pico.rom+0x150;
for (i = 0; i < len; i++)
if (name[i] != name_rom[i^1])
return 1;
return 0;
}
/* various cart-specific things, which can't be handled by generic code */
void PicoCartDetect(void)
{
int sram_size = 0, csum;
if(SRam.data) free(SRam.data); SRam.data=0;
Pico.m.sram_reg = 0;
csum = PicoRead32(0x18c) & 0xffff;
if (Pico.rom[0x1B1] == 'R' && Pico.rom[0x1B0] == 'A')
{
if (Pico.rom[0x1B2] & 0x40)
{
// EEPROM
SRam.start = PicoRead32(0x1B4) & ~1; // zero address is used for clock by some games
SRam.end = PicoRead32(0x1B8);
sram_size = 0x2000;
Pico.m.sram_reg |= 4;
} else {
// normal SRAM
SRam.start = PicoRead32(0x1B4) & 0xFFFF00;
SRam.end = PicoRead32(0x1B8) | 1;
sram_size = SRam.end - SRam.start + 1;
}
Pico.m.sram_reg |= 0x10; // SRAM was detected
}
if (sram_size <= 0)
{
// some games may have bad headers, like S&K and Sonic3
// note: majority games use 0x200000 as starting address, but there are some which
// use something else (0x300000 by HardBall '95). Luckily they have good headers.
SRam.start = 0x200000;
SRam.end = 0x203FFF;
sram_size = 0x004000;
}
if (sram_size)
{
SRam.data = (unsigned char *) calloc(sram_size, 1);
if(!SRam.data) return;
}
SRam.changed = 0;
// set EEPROM defaults, in case it gets detected
SRam.eeprom_type = 0; // 7bit (24C01)
SRam.eeprom_abits = 3; // eeprom access must be odd addr for: bit0 ~ cl, bit1 ~ in
SRam.eeprom_bit_cl = 1;
SRam.eeprom_bit_in = 0;
SRam.eeprom_bit_out= 0;
// some known EEPROM data (thanks to EkeEke)
if (name_cmp("COLLEGE SLAM") == 0 ||
name_cmp("FRANK THOMAS BIGHURT BASEBAL") == 0)
{
SRam.eeprom_type = 3;
SRam.eeprom_abits = 2;
SRam.eeprom_bit_cl = 0;
}
else if (name_cmp("NBA JAM TOURNAMENT EDITION") == 0 ||
name_cmp("NFL QUARTERBACK CLUB") == 0)
{
SRam.eeprom_type = 2;
SRam.eeprom_abits = 2;
SRam.eeprom_bit_cl = 0;
}
else if (name_cmp("NBA JAM") == 0)
{
SRam.eeprom_type = 2;
SRam.eeprom_bit_out = 1;
SRam.eeprom_abits = 0;
}
else if (name_cmp("NHLPA HOCKEY '93") == 0 ||
name_cmp("NHLPA Hockey '93") == 0 ||
name_cmp("RINGS OF POWER") == 0)
{
SRam.start = SRam.end = 0x200000;
Pico.m.sram_reg = 0x14;
SRam.eeprom_abits = 0;
SRam.eeprom_bit_cl = 6;
SRam.eeprom_bit_in = 7;
SRam.eeprom_bit_out= 7;
}
else if ( name_cmp("MICRO MACHINES II") == 0 ||
(name_cmp(" ") == 0 && // Micro Machines {Turbo Tournament '96, Military - It's a Blast!}
(csum == 0x165e || csum == 0x168b || csum == 0xCEE0 || csum == 0x2C41)))
{
SRam.start = 0x300000;
SRam.end = 0x380001;
Pico.m.sram_reg = 0x14;
SRam.eeprom_type = 2;
SRam.eeprom_abits = 0;
SRam.eeprom_bit_cl = 1;
SRam.eeprom_bit_in = 0;
SRam.eeprom_bit_out= 7;
}
// Some games malfunction if SRAM is not filled with 0xff
if (name_cmp("DINO DINI'S SOCCER") == 0 ||
name_cmp("MICRO MACHINES II") == 0)
memset(SRam.data, 0xff, sram_size);
}