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gamecstl.cpp: extend notes over dump analysis

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angelosa 2022-04-15 00:12:14 +02:00
parent b780dadfc8
commit eeec90b527
1 changed files with 55 additions and 27 deletions
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82
src/mame/drivers/gamecstl.cpp
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@ -1,30 +1,57 @@
// license:BSD-3-Clause
// copyright-holders:R. Belmont
// thanks-to: Diego Nappino
/*
Cristaltec "Game Cristal" (MAME bootleg)
Skeleton driver by R. Belmont, based on taitowlf.c by Ville Linde
Skeleton driver by R. Belmont, based on taitowlf.cpp by Ville Linde
Note:
- bp 000F16B5 do bx=0x16bb (can't skip this check?)
Specs: P3-866, SiS 630 graphics card, SiS 7018 sound, Windows 98, DirectX 8.1.
Input is via a custom COM1 port JAMMA adaptor.
The custom emulator is a heavily modified version of MAME32. If you extract the
disk image, it's in C:\GH4\GH4.EXE. It's UPX compressed, so unpack it before doing
any forensics. The emulator does run on Windows as new as XP Pro SP2 but you can't
control it due to the lack of the custom input.
Notes:
- Specs: P3-866, SiS 630 motherboard + integrated graphics card,
SiS 7018 sound, Windows 98SE, DirectX 8.1.
- Windows image can be booted with m55hipl driver.
It will try to install an "unnamed card" (svga_et4k?) then uses its own shell
"ialoader.exe" to boot the frontend, located in C:\WINDOWS.
It will eventually hang after throwing a "DirectX missing" error, trying to install
the ET4K drivers won't work (will BSoD at start of boot sequence).
- In order to bypass the shell launcher, you should:
1. edit C:\WINDOWS\system.ini and change shell property to explorer.exe
2. remove the autoexec.bat contents, it will otherwise copy a bunch of .ini
files from C:\dat to C:\WINDOWS, and replacing the system.ini shell launcher.
- (gamecstl) Device Manager installed devices:
- two Samsung SyncMaster 900SL monitors (?);
- SiS 630 display adapter;
- Samsung CD-ROM SC-152L;
- SiS 5513 Dual PCI IDE Controller;
- COM1, COM2, LPT1 enabled;
- a QDI USBDisk USB Mass Storage SCSI driver;
- a SiS 7001 PCI to USB Open Host Controller + USB root hub x 2;
- C:\drvs contains a collection of drivers, mostly the ones described above.
- Other parts of Windows are otherwise more or less stock, except for a footprint
inside C:\WINDOWS\temp:
1. has a Portuguese version of the Intel Processor Identification Utility,
most likely used for binding the emulator to the CPU serial via CPUID;
2. has u3spwd.exe (USB Flash Disk), likely used to copy the necessary files for
making the frontend to work;
- Input is via a custom COM1 port JAMMA adaptor.
- The custom emulator is a heavily modified version of MAME32. If you extract the
disk image, it's in C:\GH4\GH4.EXE. It's UPX compressed, so unpack it before doing
any forensics. The emulator does run on Windows as new as XP Pro SP2 but you can't
control it due to the lack of the custom input.
- C:\GH4\mvs contains movie clips of the emulated games.
These are MS-CRAM encoded, 288x208 at 20 fps, stereo MS ADPCM with 11025 Hz sample rate,
36 seconds length.
Mentioning this because SiS 630 has several HW registers dedicated to video playback,
which will be most likely used once we get there.
Updates 27/11/2007 (Diego Nappino):
The COM1 port is opened at 19200 bps, No parity, 8 bit data,1 stop bit.
The COM1 port is opened at 19200 bps, No parity, 8 bit data, 1 stop bit.
The protocol is based on a 6 bytes frame with a leading byte valued 0x05 and a trailing one at 0x02
The four middle bytes are used, in negative logic (0xFF = No button pressed), to implement the inputs.
Each bit meaning as follows :
Each bit meaning as follows:
Byte 1 Byte 2 Byte 3 Byte 4
Bit 0 P1-Credit P1-Button C P2-Left UNUSED
Byte 1 Byte 2 Byte 3 Byte 4
Bit 0 P1-Credit P1-Button C P2-Left UNUSED
Bit 1 P1-Start P1-Button D P2-Right UNUSED
Bit 2 P1-Down P1-Button E P2-Button A SERVICE
Bit 3 P1-Up TEST P2-Button B UNUSED
@ -33,7 +60,8 @@
Bit 6 P1-Button A P2-Down P2-Button E UNUSED
Bit 7 P1-Button B P2-Up VIDEO-MODE UNUSED
The JAMMA adaptor sends a byte frame each time an input changes. So, in example, if the P1-Button A and P1-Button B are both pressed, it will send :
The JAMMA adaptor sends a byte frame each time an input changes.
So for example, if the P1-Button A and P1-Button B are both pressed, it will send:
0x05 0xFC 0xFF 0xFF 0xFF 0x02
@ -42,8 +70,8 @@
0x05 0xFF 0xFF 0xFF 0xFF 0x02
CPUID info:
Original set:
Original set:
CPUID Level: EAX: EBX: ECX: EDX:
00000000 00000003 756E6547 6C65746E 49656E69
00000001 0000068A 00000002 00000000 0387F9FF
@ -52,7 +80,6 @@
80000000 00000000 00000000 CA976D2E 000082F6
C0000000 00000000 00000000 CA976D2E 000082F6
Version 2:
CPUID Level: EAX: EBX: ECX: EDX:
00000000 00000003 756E6547 6C65746E 49656E69
@ -78,10 +105,11 @@ class gamecstl_state : public pcat_base_state
{
public:
gamecstl_state(const machine_config &mconfig, device_type type, const char *tag)
: pcat_base_state(mconfig, type, tag),
m_cga_ram(*this, "cga_ram"),
m_gfxdecode(*this, "gfxdecode"),
m_palette(*this, "palette") { }
: pcat_base_state(mconfig, type, tag)
, m_cga_ram(*this, "cga_ram")
, m_gfxdecode(*this, "gfxdecode")
, m_palette(*this, "palette")
{ }
void gamecstl(machine_config &config);
@ -412,7 +440,6 @@ void gamecstl_state::machine_reset()
void gamecstl_state::gamecstl(machine_config &config)
{
/* basic machine hardware */
PENTIUM3(config, m_maincpu, 200000000);
m_maincpu->set_addrmap(AS_PROGRAM, &gamecstl_state::gamecstl_map);
m_maincpu->set_addrmap(AS_IO, &gamecstl_state::gamecstl_io);
@ -420,6 +447,7 @@ void gamecstl_state::gamecstl(machine_config &config)
pcat_common(config);
// TODO: wrong, needs SiS 630 instead
pci_bus_legacy_device &pcibus(PCI_BUS_LEGACY(config, "pcibus", 0, 0));
pcibus.set_device(0, FUNC(gamecstl_state::intel82439tx_pci_r), FUNC(gamecstl_state::intel82439tx_pci_w));
pcibus.set_device(7, FUNC(gamecstl_state::intel82371ab_pci_r), FUNC(gamecstl_state::intel82371ab_pci_w));
@ -427,7 +455,6 @@ void gamecstl_state::gamecstl(machine_config &config)
ide_controller_device &ide(IDE_CONTROLLER(config, "ide").options(ata_devices, "hdd", nullptr, true));
ide.irq_handler().set("pic8259_2", FUNC(pic8259_device::ir6_w));
/* video hardware */
screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
screen.set_refresh_hz(60);
screen.set_vblank_time(ATTOSECONDS_IN_USEC(0));
@ -455,9 +482,10 @@ ROM_START(gamecstl)
ROM_LOAD( "bios.bin", 0x000000, 0x040000, BAD_DUMP CRC(27834ce9) SHA1(134c546dd75138c6f4bc5729b40e20e118454df9) )
ROM_REGION(0x08100, "gfx1", 0)
ROM_LOAD("cga.chr", 0x00000, 0x01000, BAD_DUMP CRC(42009069) SHA1(ed08559ce2d7f97f68b9f540bddad5b6295294dd))
ROM_LOAD( "cga.chr", 0x00000, 0x01000, BAD_DUMP CRC(42009069) SHA1(ed08559ce2d7f97f68b9f540bddad5b6295294dd))
DISK_REGION( "ide:0:hdd:image" )
// Note: has filled NVRAM directory
DISK_IMAGE( "gamecstl", 0, SHA1(b431af3c42c48ba07972d77a3d24e60ee1e4359e) )
ROM_END
@ -466,7 +494,7 @@ ROM_START(gamecst2)
ROM_LOAD( "bios.bin", 0x000000, 0x040000, BAD_DUMP CRC(27834ce9) SHA1(134c546dd75138c6f4bc5729b40e20e118454df9) )
ROM_REGION(0x08100, "gfx1", 0)
ROM_LOAD("cga.chr", 0x00000, 0x01000, BAD_DUMP CRC(42009069) SHA1(ed08559ce2d7f97f68b9f540bddad5b6295294dd))
ROM_LOAD( "cga.chr", 0x00000, 0x01000, BAD_DUMP CRC(42009069) SHA1(ed08559ce2d7f97f68b9f540bddad5b6295294dd))
DISK_REGION( "ide:0:hdd:image" )
DISK_IMAGE( "gamecst2", 0, SHA1(14e1b311cb474801c7bdda3164a0c220fb102159) )