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[MD] added Super Mario World 64 (unlicensed) cartridge hardware emulation

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This commit is contained in:
EkeEke 2012-11-06 21:53:22 +01:00
parent 5702eb2b8f
commit 8d51460b1d
1 changed files with 201 additions and 0 deletions
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201
source/cart_hw/md_cart.c
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@ -67,6 +67,8 @@ static void mapper_sf004_w(uint32 address, uint32 data);
static uint32 mapper_sf004_r(uint32 address);
static void mapper_t5740_w(uint32 address, uint32 data);
static uint32 mapper_t5740_r(uint32 address);
static uint32 mapper_smw_64_r(uint32 address);
static void mapper_smw_64_w(uint32 address, uint32 data);
static void mapper_realtec_w(uint32 address, uint32 data);
static void mapper_seganet_w(uint32 address, uint32 data);
static void mapper_32k_w(uint32 data);
@ -704,6 +706,38 @@ void md_cart_init(void)
zbank_memory_map[i].write = zbank_unused_w;
}
}
else if ((*(uint16 *)(cart.rom + 0x08) == 0x6000) && (*(uint16 *)(cart.rom + 0x0a) == 0x01f6))
{
/* Super Mario World 64 (unlicensed) mapper */
for (i=0x08; i<0x10; i++)
{
/* lower 512KB mirrored */
m68k.memory_map[i].base = cart.rom + ((i & 7) << 16);
}
for (i=0x10; i<0x40; i++)
{
/* unused area */
m68k.memory_map[i].read8 = m68k_read_bus_8;
m68k.memory_map[i].read16 = m68k_read_bus_16;
m68k.memory_map[i].write8 = m68k_unused_8_w;
m68k.memory_map[i].write16 = m68k_unused_16_w;
zbank_memory_map[i].read = m68k_read_bus_8;
zbank_memory_map[i].write = zbank_unused_w;
}
for (i=0x60; i<0x70; i++)
{
/* custom hardware */
m68k.memory_map[i].base = cart.rom + 0x0f0000;
m68k.memory_map[i].read8 = ((i & 0x07) < 0x04) ? NULL : mapper_smw_64_r;
m68k.memory_map[i].read16 = ((i & 0x07) < 0x04) ? NULL : mapper_smw_64_r;
m68k.memory_map[i].write8 = mapper_smw_64_w;
m68k.memory_map[i].write16 = mapper_smw_64_w;
zbank_memory_map[i].read = ((i & 0x07) < 0x04) ? NULL : mapper_smw_64_r;
zbank_memory_map[i].write = mapper_smw_64_w;
}
}
else if (cart.romsize > 0x400000)
{
/* assume linear ROM mapper without bankswitching (max. 10MB) */
@ -1271,6 +1305,173 @@ static uint32 mapper_t5740_r(uint32 address)
return READ_BYTE(cart.rom, address);
}
/*
Super Mario World 64 (unlicensed) mapper
*/
static void mapper_smw_64_w(uint32 address, uint32 data)
{
/* internal registers (saved to backup RAM) */
switch ((address >> 16) & 0x07)
{
case 0x00: /* $60xxxx */
{
if (address & 2)
{
/* $600003 data write mode ? */
switch (sram.sram[0x00] & 0x07)
{
case 0x00:
{
/* update value returned at $660001-$660003 */
sram.sram[0x06] = ((sram.sram[0x06] ^ sram.sram[0x01]) ^ data) & 0xFE;
break;
}
case 0x01:
{
/* update value returned at $660005-$660007 */
sram.sram[0x07] = data & 0xFE;
break;
}
case 0x07:
{
/* update selected ROM bank (upper 512K) mapped at $610000-$61ffff */
m68k.memory_map[0x61].base = m68k.memory_map[0x69].base = cart.rom + 0x080000 + ((data & 0x1c) << 14);
break;
}
default:
{
/* unknown mode */
break;
}
}
/* $600003 data register */
sram.sram[0x01] = data;
}
else
{
/* $600001 ctrl register */
sram.sram[0x00] = data;
}
return;
}
case 0x01: /* $61xxxx */
{
if (address & 2)
{
/* $610003 ctrl register */
sram.sram[0x02] = data;
}
return;
}
case 0x04: /* $64xxxx */
{
if (address & 2)
{
/* $640003 data register */
sram.sram[0x04] = data;
}
else
{
/* $640001 data register */
sram.sram[0x03] = data;
}
return;
}
case 0x06: /* $66xxxx */
{
/* unknown */
return;
}
case 0x07: /* $67xxxx */
{
if (!(address & 2))
{
/* $670001 ctrl register */
sram.sram[0x05] = data;
/* upper 512K ROM bank-switching enabled ? */
if (sram.sram[0x02] & 0x80)
{
/* update selected ROM bank (upper 512K) mapped at $600000-$60ffff */
m68k.memory_map[0x60].base = m68k.memory_map[0x68].base = cart.rom + 0x080000 + ((data & 0x1c) << 14);
}
}
return;
}
default: /* not used */
{
m68k_unused_8_w(address, data);
return;
}
}
}
static uint32 mapper_smw_64_r(uint32 address)
{
/* internal registers (saved to backup RAM) */
switch ((address >> 16) & 0x03)
{
case 0x02: /* $66xxxx */
{
switch ((address >> 1) & 7)
{
case 0x00: return sram.sram[0x06];
case 0x01: return sram.sram[0x06] + 1;
case 0x02: return sram.sram[0x07];
case 0x03: return sram.sram[0x07] + 1;
case 0x04: return sram.sram[0x08];
case 0x05: return sram.sram[0x08] + 1;
case 0x06: return sram.sram[0x08] + 2;
case 0x07: return sram.sram[0x08] + 3;
}
}
case 0x03: /* $67xxxx */
{
uint8 data = (sram.sram[0x02] & 0x80) ? ((sram.sram[0x05] & 0x40) ? (sram.sram[0x03] & sram.sram[0x04]) : (sram.sram[0x03] ^ 0xFF)) : 0x00;
if (address & 2)
{
/* $670003 */
data &= 0x7f;
}
else
{
/* $66xxxx data registers update */
if (sram.sram[0x05] & 0x80)
{
if (sram.sram[0x05] & 0x20)
{
/* update $660009-$66000f data register */
sram.sram[0x08] = (sram.sram[0x04] << 2) & 0xFC;
}
else
{
/* update $660001-$660003 data register */
sram.sram[0x06] = (sram.sram[0x01] ^ (sram.sram[0x03] << 1)) & 0xFE;
}
}
}
return data;
}
default: /* 64xxxx-$65xxxx */
{
return 0x00;
}
}
}
/*
Realtec ROM bankswitch (Earth Defend, Balloon Boy & Funny World, Whac-A-Critter)
(Note: register usage is inverted in TascoDlx documentation)