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Update PCB information in chinagat.cpp

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Current document says it's unknown where are the background images
stored. But it should be in the TRJ-100 custom package, that needs a
custom adapter to dump it.

Also add a side note that the TRJ-100 chip generates 5MHz clock for
some unknown reasons, and used by some ICs as a clock. This may help
to solve the speed problems in the future.
This commit is contained in:
Yukari Tamura 2019-08-21 23:44:39 +09:00
parent 4d77a8ea0d
commit ac9b320727
1 changed files with 9 additions and 7 deletions
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16
src/mame/drivers/chinagat.cpp
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@ -13,16 +13,18 @@ NOTES:
A couple of things unaccounted for:
No backgrounds ROMs from the original board...
- This may be related to the SubCPU. I don't think it's contributing
much right now, but I could be wrong. And it would explain that vast
expanse of bankswitch ROM on a slave CPU....
- Just had a look at the sprites, and they seem like kosher sprites all
the way up.... So it must be hidden in the sub-cpu somewhere?
- TOSHIBA TRJ-100 installed at the second board should contain the image
as U.S. Championship V'Ball has a TRJ-101 that contains it. A custom made
adapter is needed to dump it.
- Got two bootleg sets with background gfx roms. Using those on the
original games for now.
OBVIOUS SPEED PROBLEMS...
- Timers are too fast and/or too slow, and the whole thing's moving too fast
- TRJ-100 is accessed at about 3MHz speed, but seems to generate 5MHz clock
internally. This clock is exposed at the pin 22, and used as a clock at least
for some shifter ICs, such as IC110, 111, 112, and 113. Timers might be based
on this 5MHz clock, too?
Port 0x2800 on the Sub CPU.
- All those I/O looking ports on the main CPU (0x3exx and 0x3fxx)
@ -733,7 +735,7 @@ ROM_START( chinagat )
ROM_REGION(0x40000, "gfx3", 0 ) /* Background */
ROM_LOAD( "chinagat_a-13", 0x00000, 0x10000, BAD_DUMP CRC(b745cac4) SHA1(759767ca7c5123b03b9e1a42bb105d194cb76400) ) // not dumped yet, these were taken from the bootleg set instead
ROM_LOAD( "chinagat_a-12", 0x10000, 0x10000, BAD_DUMP CRC(3c864299) SHA1(cb12616e4d6c53a82beb4cd51510a632894b359c) ) // Where are these on the real board?
ROM_LOAD( "chinagat_a-12", 0x10000, 0x10000, BAD_DUMP CRC(3c864299) SHA1(cb12616e4d6c53a82beb4cd51510a632894b359c) ) // TRJ-100 should contain it, but not dumped yet.
ROM_LOAD( "chinagat_a-15", 0x20000, 0x10000, BAD_DUMP CRC(2f268f37) SHA1(f82cfe3b2001d5ed2a709ca9c51febcf624bb627) )
ROM_LOAD( "chinagat_a-14", 0x30000, 0x10000, BAD_DUMP CRC(aef814c8) SHA1(f6b9229ca7beb9a0e47d1f6a1083c6102fdd20c8) )
@ -770,7 +772,7 @@ ROM_START( saiyugou )
ROM_REGION(0x40000, "gfx3", 0 ) /* Background */
ROM_LOAD( "saiyugou_a-13", 0x00000, 0x10000, BAD_DUMP CRC(b745cac4) SHA1(759767ca7c5123b03b9e1a42bb105d194cb76400) ) // not dumped yet, these were taken from the bootleg set instead
ROM_LOAD( "saiyugou_a-12", 0x10000, 0x10000, BAD_DUMP CRC(3c864299) SHA1(cb12616e4d6c53a82beb4cd51510a632894b359c) ) // Where are these on the real board?
ROM_LOAD( "saiyugou_a-12", 0x10000, 0x10000, BAD_DUMP CRC(3c864299) SHA1(cb12616e4d6c53a82beb4cd51510a632894b359c) ) // TRJ-100 should contain it, but not dumped yet.
ROM_LOAD( "saiyugou_a-15", 0x20000, 0x10000, BAD_DUMP CRC(2f268f37) SHA1(f82cfe3b2001d5ed2a709ca9c51febcf624bb627) )
ROM_LOAD( "saiyugou_a-14", 0x30000, 0x10000, BAD_DUMP CRC(aef814c8) SHA1(f6b9229ca7beb9a0e47d1f6a1083c6102fdd20c8) )