// license: BSD-3-Clause
// copyright-holders: Dirk Best, Segher Boessenkool
/***************************************************************************
Nintendo GameCube
Skeleton driver, just to document the available firmware dumps
for now.
***************************************************************************/
#include "emu.h"
#include "cpu/powerpc/ppc.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
class gamecube_state : public driver_device
{
public:
gamecube_state(const machine_config &mconfig, device_type type, const char *tag) :
driver_device(mconfig, type, tag),
m_cpu(*this, "maincpu")
{ }
void gc(machine_config &config);
void ppc_mem(address_map &map);
protected:
virtual void machine_start() override;
virtual void machine_reset() override;
private:
void decrypt(uint8_t *data, unsigned size);
required_device<cpu_device> m_cpu;
};
//**************************************************************************
// ADDRESS MAPS
//**************************************************************************
void gamecube_state::ppc_mem(address_map &map)
{
map(0x00000000, 0x017fffff).ram(); // 24 MB main memory
map(0x08000000, 0x081fffff).ram(); // 2 MB embedded framebuffer
map(0xfff00000, 0xffffffff).bankr("boot");
}
//**************************************************************************
// INPUTS
//**************************************************************************
INPUT_PORTS_START( gc )
INPUT_PORTS_END
//**************************************************************************
// MACHINE
//**************************************************************************
// bootrom descrambler reversed by segher
// Copyright 2008-2017 Segher Boessenkool <segher@kernel.crashing.org>
void gamecube_state::decrypt(uint8_t *data, unsigned size)
{
uint8_t acc = 0;
uint8_t nacc = 0;
uint16_t t = 0x2953;
uint16_t u = 0xd9c2;
uint16_t v = 0x3ff1;
uint8_t x = 1;
for (unsigned it = 0; it < size;)
{
int t0 = t & 1;
int t1 = (t >> 1) & 1;
int u0 = u & 1;
int u1 = (u >> 1) & 1;
int v0 = v & 1;
x ^= t1 ^ v0;
x ^= (u0 | u1);
x ^= (t0 ^ u1 ^ v0) & (t0 ^ u0);
if (t0 == u0)
{
v >>= 1;
if (v0)
v ^= 0xb3d0;
}
if (t0 == 0)
{
u >>= 1;
if (u0)
u ^= 0xfb10;
}
t >>= 1;
if (t0)
t ^= 0xa740;
nacc++;
acc = 2 * acc + x;
if (nacc == 8)
{
data[it++] ^= acc;
nacc = 0;
}
}
}
void gamecube_state::machine_start()
{
decrypt(memregion("ipl")->base() + 0x100, 0x1afe00);
// swap endianess after decryption
uint8_t *base;
int i, j;
for (i = 0, base = memregion("ipl")->base(); i < memregion("ipl")->bytes(); i += 8)
{
uint8_t temp[8];
memcpy(temp, base, 8);
for (j = 8 - 1; j >= 0; j--)
*base++ = temp[j];
}
membank("boot")->set_base(memregion("ipl")->base());
}
void gamecube_state::machine_reset()
{
}
//**************************************************************************
// MACHINE DEFINITIONS
//**************************************************************************
MACHINE_CONFIG_START(gamecube_state::gc)
MCFG_DEVICE_ADD("maincpu", PPC603, 485000000 / 100) // 485 MHz IBM "Gekko" (750CXe/750FX based)
MCFG_DEVICE_PROGRAM_MAP(ppc_mem)
MACHINE_CONFIG_END
//**************************************************************************
// ROM DEFINITIONS
//**************************************************************************
/* There are a lot of bad dumps of the gamecube IPLs floating around.
The following IPL dumps are known bad, with RAM/MAC address garbage in the last 0x8000 bytes:
ROM_LOAD("ipl_bad_ntsc_v10.bin", 0x000000, 0x200000, CRC(6d740ae7) SHA1(015808f637a984acde6a06efa7546e278293c6ee))
ROM_LOAD("ipl_bad2_ntsc_v10.bin", 0x000000, 0x200000, CRC(8bdabbd4) SHA1(f1b0ef434cd74fd8fe23698e2fc911d945b45bf1))
ROM_LOAD("ipl_bad_pal_v10.bin", 0x000000, 0x200000, CRC(dd8cab7c) SHA1(6f305c37dc1fbe332883bb8153eee26d3d325629))
The following rom is flat out unknown and unseen in the wild, except for its checksums:
ROM_LOAD("ipl_unknown.bin", 0x000000, 0x200000, CRC(d235e3f9) SHA1(96f69a21645de73a5ba61e57951ef303d55788c5))
*/
ROM_START( gcjp ) // DOL-001(JPN) and DOL-101(JPN); NTSC gamecube board, outputs NTSC color, NTSC timings; JPN Region jumper set
ROM_REGION(0x200000, "ipl", 0)
ROM_DEFAULT_BIOS("v12")
ROM_SYSTEM_BIOS(0, "v10", "NTSC Revision 1.0") // Internal version 36 Mar 22 2001 22:38:31
ROMX_LOAD("ipl_ntsc_v10.bin", 0x000000, 0x200000, CRC(6dac1f2a) SHA1(a1837968288253ed541f2b11440b68f5a9b33875), ROM_BIOS(1))
ROM_SYSTEM_BIOS(1, "v11", "NTSC Revision 1.1") // Internal version 47 Sep 27 2001 15:15:22
ROMX_LOAD("ipl_ntsc_v11.bin", 0x000000, 0x200000, CRC(d5e6feea) SHA1(239eacd86527ff9a75aeb7282da65797baeef010), ROM_BIOS(2))
ROM_SYSTEM_BIOS(2, "v12", "NTSC Revision 1.2") // Internal version 0x2301 Jun 16 2003 04:27:06
ROMX_LOAD("ipl_ntsc_v12.bin", 0x000000, 0x200000, CRC(86573808) SHA1(ef9194ab4804aa0aa8540d846caf291b28331165), ROM_BIOS(3)) // not verified from console yet but seems good
// There may be another IPL with the same "NTSC Revision 1.2" string as above but not the same code. If so, it is undumped.
ROM_REGION(0x20000, "dvd", 0)
ROM_LOAD("20010608.bin", 0x00000, 0x20000, CRC(c047465a) SHA1(27872c201e87b06a19bf85d36c796ef383f8d52d))
ROM_REGION(0x1000, "dsp_coef", 0)
ROM_LOAD("dsp_coef.bin", 0x0000, 0x1000, CRC(d2777c90) SHA1(c116d867ba001dcd6bf6d399ff4bf38d340f556c))
ROM_REGION(0x2000, "dsp_rom", 0)
ROM_LOAD("dsp_rom.bin", 0x0000, 0x2000, CRC(47daaa65) SHA1(3c6cc6e04fdd0b2a392d7a6ed769455444846be7))
ROM_END
ROM_START( gcus ) // DOL-001(USA) and DOL-101(USA); NTSC gamecube board, outputs NTSC color, NTSC timings; USA region jumper set
ROM_REGION(0x200000, "ipl", 0)
ROM_DEFAULT_BIOS("v12")
ROM_SYSTEM_BIOS(0, "v10", "NTSC Revision 1.0") // Internal version 36 Mar 22 2001 22:38:31
ROMX_LOAD("ipl_ntsc_v10.bin", 0x000000, 0x200000, CRC(6dac1f2a) SHA1(a1837968288253ed541f2b11440b68f5a9b33875), ROM_BIOS(1))
ROM_SYSTEM_BIOS(1, "v11", "NTSC Revision 1.1") // Internal version 47 Sep 27 2001 15:15:22
ROMX_LOAD("ipl_ntsc_v11.bin", 0x000000, 0x200000, CRC(d5e6feea) SHA1(239eacd86527ff9a75aeb7282da65797baeef010), ROM_BIOS(2))
ROM_SYSTEM_BIOS(2, "v12", "NTSC Revision 1.2") // Internal version 0x2301 Jun 16 2003 04:27:06
ROMX_LOAD("ipl_ntsc_v12.bin", 0x000000, 0x200000, CRC(86573808) SHA1(ef9194ab4804aa0aa8540d846caf291b28331165), ROM_BIOS(3)) // not verified from console yet but seems good
// There may be another IPL with the same "NTSC Revision 1.2" string as above but not the same code. If so, it is undumped.
ROM_REGION(0x20000, "dvd", 0)
ROM_LOAD("20010608.bin", 0x00000, 0x20000, CRC(c047465a) SHA1(27872c201e87b06a19bf85d36c796ef383f8d52d))
ROM_REGION(0x1000, "dsp_coef", 0)
ROM_LOAD("dsp_coef.bin", 0x0000, 0x1000, CRC(d2777c90) SHA1(c116d867ba001dcd6bf6d399ff4bf38d340f556c))
ROM_REGION(0x2000, "dsp_rom", 0)
ROM_LOAD("dsp_rom.bin", 0x0000, 0x2000, CRC(47daaa65) SHA1(3c6cc6e04fdd0b2a392d7a6ed769455444846be7))
ROM_END
ROM_START( gceu ) // DOL-001(EUR) and DOL-101(EUR); PAL gamecube board, outputs PAL-E color, PAL-E timings; EUR region (not sure if there is a separate jumper for this?)
ROM_REGION(0x200000, "ipl", 0)
ROM_DEFAULT_BIOS("v12")
ROM_SYSTEM_BIOS(0, "v10", "PAL Revision 1.0") // Internal version 47 Sep 27 2001 15:15:22
ROMX_LOAD("ipl_pal_v10.bin", 0x000000, 0x200000, CRC(4f319f43) SHA1(f27c63e5394e2fd1606f70df004c4fc2d6027700), ROM_BIOS(1))
// there might be an undumped "PAL Revision 1.1" IPL
ROM_SYSTEM_BIOS(1, "v12", "PAL Revision 1.2") // Internal version 0x2301 Jun 16 2003 04:27:06
ROMX_LOAD("ipl_pal_v12.bin", 0x000000, 0x200000, CRC(ad1b7f16) SHA1(80b8744ff5e43585392f55546bd03a673d11ef5f), ROM_BIOS(2)) // not verified from console yet but seems good
ROM_REGION(0x20000, "dvd", 0)
ROM_LOAD("20010608.bin", 0x00000, 0x20000, CRC(c047465a) SHA1(27872c201e87b06a19bf85d36c796ef383f8d52d))
ROM_REGION(0x1000, "dsp_coef", 0)
ROM_LOAD("dsp_coef.bin", 0x0000, 0x1000, CRC(d2777c90) SHA1(c116d867ba001dcd6bf6d399ff4bf38d340f556c))
ROM_REGION(0x2000, "dsp_rom", 0)
ROM_LOAD("dsp_rom.bin", 0x0000, 0x2000, CRC(47daaa65) SHA1(3c6cc6e04fdd0b2a392d7a6ed769455444846be7))
ROM_END
ROM_START( gcbr ) // DOL-002(BRA); NTSC gamecube board, outputs video with PAL-M color, and either PAL-E (for the IPL) or PAL-M (for games) timings; region jumper is unknown but probably USA
ROM_REGION(0x200000, "ipl", 0) // "MPAL Revision 1.1", Internal version 47 Sep 27 2001 15:15:22
ROM_LOAD("ipl_mpal_v11.bin", 0x000000, 0x200000, CRC(667d0b64) SHA1(f3cd0c7c61cbcefa85e7de3aff4cfa50bc508714))
ROM_REGION(0x20000, "dvd", 0)
ROM_LOAD("20010608.bin", 0x00000, 0x20000, CRC(c047465a) SHA1(27872c201e87b06a19bf85d36c796ef383f8d52d))
ROM_REGION(0x1000, "dsp_coef", 0)
ROM_LOAD("dsp_coef.bin", 0x0000, 0x1000, CRC(d2777c90) SHA1(c116d867ba001dcd6bf6d399ff4bf38d340f556c))
ROM_REGION(0x2000, "dsp_rom", 0)
ROM_LOAD("dsp_rom.bin", 0x0000, 0x2000, CRC(47daaa65) SHA1(3c6cc6e04fdd0b2a392d7a6ed769455444846be7))
ROM_END
//**************************************************************************
// SYSTEM DRIVERS
//**************************************************************************
// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS
CONS( 2001, gcjp, 0, 0, gc, gc, gamecube_state, empty_init, "Nintendo", "GameCube (Japan)", MACHINE_IS_SKELETON )
CONS( 2001, gcus, gcjp, 0, gc, gc, gamecube_state, empty_init, "Nintendo", "GameCube (USA)", MACHINE_IS_SKELETON )
CONS( 2002, gceu, gcjp, 0, gc, gc, gamecube_state, empty_init, "Nintendo", "GameCube (EUR)", MACHINE_IS_SKELETON )
CONS( 2002, gcbr, gcjp, 0, gc, gc, gamecube_state, empty_init, "Nintendo", "GameCube (Brazil)", MACHINE_IS_SKELETON )