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gammagic.cpp: discover that removing data track pregaps makes CD-ROM dumps to be mountable [Carl, Angelo Salese]

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angelosa 2022-04-13 19:10:39 +02:00
parent 7bb372f194
commit 8c00d8bdc6
1 changed files with 16 additions and 5 deletions
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21
src/mame/drivers/gammagic.cpp
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@ -13,10 +13,11 @@ TODO:
Should be a m55hipl with CD-ROM as bootable option, m55-04ns and m55-04s doesn't cope with
this requirement, dump mentions using El Torito specs at offset 0x8801.
- CD-ROM dumps are unreadable by DOS ("not High Sierra or ISO9660"),
both dumps have FAT filesystem (cfr. gammagic at 0x1d90e00) and MS Joilet directories (0x4b000),
and doesn't seem to have valid boot/volume descriptors on top, likely missing the first 150
sectors from the dumps.
.cue also sports a single data track with 2 seconds pregap, which backs up this theory ...
.cue sports a single data track with 2 seconds pregap, extracting the CD and editing
the .cue to remove the pregap makes it mountable, is it a chd issue or dump mistake?
- Missing 68k dump portion.
Very unlikely it transfers code from serial, and CD-ROM dump doesn't have any clear file that
would indicate a code transfer or an handshake between main and sub CPUs;
===================================================================================================
@ -30,11 +31,13 @@ V8000 platform includes:
1 Motherboard MICRONICS M55Hi-Plus PCI/ISA, Chipset INTEL i430HX (TRITON II), 64 MB Ram (4 SIMM M x 16 MB SIMM)
On board Sound Blaster Vibra 16C chipset.
[has optional ESS references in dump -AS]
1 TOSHIBA CD-ROM or DVD-ROM Drive w/Bootable CD-ROM with Game.
1 OAK SVGA PCI Video Board.
1 Voodoo Graphics PCI Video Board, connected to the monitor.
[Voodoo 1 or 2 according to strings in dump -AS]
[Voodoo 1 or 2 according to strings in dump -AS]
1 21" SVGA Color Monitor, 16x9 Aspect, Vertical mount, with touchscreen.
[running at 50Hz with option for 60Hz declared in config file -AS]
1 Bally's IO-Board, Based on 68000 procesor as interface to all gaming devices
(Buttons, Lamps, Switches, Coin acceptor, Bill Validator, Hopper, Touchscreen, etc...)
@ -126,6 +129,10 @@ ROM_START( gammagic )
// TODO: specs mentions a m55hipl compatible BIOS, this is 5HX29
ROM_LOAD("5hx29.bin", 0x20000, 0x20000, BAD_DUMP CRC(07719a55) SHA1(b63993fd5186cdb4f28c117428a507cd069e1f68))
ROM_REGION(0x20000, "v8000", 0)
// 68k code, unknown size/number of roms
ROM_LOAD("v8000.bin", 0x0000, 0x20000, NO_DUMP)
DISK_REGION( "cdrom" )
DISK_IMAGE_READONLY( "gammagic", 0, BAD_DUMP SHA1(caa8fc885d84dbc07fb0604c76cd23c873a65ce6) )
ROM_END
@ -142,6 +149,10 @@ ROM_START( 99bottles )
// TODO: specs mentions a m55hipl compatible BIOS, this is 5HX29
ROM_LOAD("5hx29.bin", 0x20000, 0x20000, BAD_DUMP CRC(07719a55) SHA1(b63993fd5186cdb4f28c117428a507cd069e1f68))
ROM_REGION(0x20000, "v8000", 0)
// 68k code, unknown size/number of roms
ROM_LOAD("v8000.bin", 0x0000, 0x20000, NO_DUMP)
DISK_REGION( "cdrom" )
DISK_IMAGE_READONLY( "99bottles", 0, BAD_DUMP SHA1(0b874178c8dd3cfc451deb53dc7936dc4ad5a04f))
ROM_END