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Add documentation for differing Model 1 coprocessor chips

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balr0g 2017-02-20 17:40:01 -05:00
parent ef3417e5b7
commit 6735d48c68
1 changed files with 11 additions and 7 deletions
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src/mame/drivers/model1.cpp
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@ -11,11 +11,12 @@ Star Wars Arcade (C) Sega, 1994
Virtua Fighter (C) Sega, 1993
Virtua Racing (C) Sega, 1992
Wing War (C) Sega, 1994
Tecwar/Netmerc (C) Sega and Virtuality, 1993
The Sega Model 1 system comprises several PCB's....
CPU PCB - This is the main PCB. It holds the main CPU, some surface-mounted ROMs and the 3D co-processors
(manufactured by Fujitsu and known as 'TGP'). The PCB is the same for all Model 1 games, but some
games are not swappable due to a different internal 3D co-processor program.
(manufactured by Fujitsu and known as 'TGP'). There are three different PCB variants, with
different internal 3D co-processor programs depending on game.
Video PCB - There is only one known revision of this PCB so any game can use this PCB. It contains a very large
quantity of RAM, some surface-mounted ROMs and some custom Sega video chips. The RGB and Sync is also
outputted from this PCB. The horizontal sync is 24kHz and requires a medium resolution (24kHz) monitor.
@ -144,8 +145,8 @@ MODEL-1 CPU BOARD 837-8886171-6298C (C) SEGA 1992
| |-----------| 3771 |-----------| |
| | | | | |
| | SEGA | | SEGA | D71051 |
| | 315-5572 | | 315-5573 | |-----------| |
| | | | | | | M5M5178 OPR-14743.45 |
| | 315-5572 | | COPRO | |-----------| |
| | | |(see notes)| | | M5M5178 OPR-14743.45 |
| | | | | | SEGA | M5M5178 |
| |-----------| |-----------| | 315-5464 | M5M5178 OPR-14742.44 |
| | | M5M5178 |
@ -180,9 +181,12 @@ Notes:
*1 - Unpopulated position for Fujitsu MB8421
D70615GD-16 - NEC uPD70615GD-16-S V60 CPU, running at 16.000MHz (QFP120, clock 32 / 2)
315-5546A - Lattice GAL16V8A (DIP20)
315-5571 - Sega Custom (IC57/IC58, QFP160) \
315-5572 - Sega Custom (IC60/IC66, QFP160) / According to test mode, these chips are the TGPs
315-5573 - Sega Custom (QFP160)
315-5571 - Fujitsu MB86233 Geometrizer (IC57/IC58, QFP160) \
315-5572 - Fujitsu MB86233 Geometrizer (different code) (IC60/IC66, QFP160) / According to test mode, these chips are the TGPs
COPRO - Fujitsu MB86233 (QFP160) Coprocessor, differs depending on game:
315-5573 - Virtua Racing, Virtua Formula (original for above board part number)
315-5711 - Wing War, Star Wars Arcade, Netmerc
315-5724 - Virtua Fighter
315-5463 - Sega Custom (QFP160)
315-5464 - Sega Custom (QFP160)
315-5465 - Sega Custom (QFP100)