// 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 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 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 //************************************************************************** void gamecube_state::gc(machine_config &config) { PPC603(config, m_cpu, 485000000 / 100); // 485 MHz IBM "Gekko" (750CXe/750FX based) m_cpu->set_addrmap(AS_PROGRAM, &gamecube_state::ppc_mem); } //************************************************************************** // 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(0)) 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(1)) 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(2)) // 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(0)) 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(1)) 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(2)) // 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(0)) // "PAL Revision 1.1" IPL probably doesn't exist; the internal version of "PAL Revision 1.0" lines up with "NTSC Revision 1.1" 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(1)) // 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 )