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some M81 PCB details based on Chris Hardy's observations.

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still checking some details with Bill (DU), if confirmed to be the case for all M81 PCBs I'm going to make the jumper setting a PORT_CONF option, and default it to the correct value for each game.
This commit is contained in:
David Haywood 2015-10-06 21:28:29 +01:00
parent e4f6791559
commit 2b5b0b048d
1 changed files with 31 additions and 3 deletions
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34
src/mame/drivers/m72.c
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@ -25,9 +25,29 @@ M72 - 3 board stack, 2 known variants
for an I8751 MCU and sample playback
M81 - revised hardware, Z80 uses a ROM, no MCU, same video
M81 - 2 PCB Stack
M81-A-B (top board) (seen on Dragon Breed)
CPUs, program roms etc.
M81-B-B (bottom board) (seen on Dragon Breed)
supports
8 sprite ROMS
4 tile roms for FG layer (A0-A3)
(Jumper J3 also allows them to be used for BG)
4 tile roms for BG layer (B0-B3)
The Jumper at J3 seems to be an important difference
from M72, it allows both the FG and BG layers to
operate from a single set of ROMs.
W - use both sets of ROMs
S - use a single set of ROMs (A0-A3)
revised hardware, Z80 uses a ROM, no MCU, same video
system as M72 (some layer offsets - why?)
M82 - board made for Major Title, Z80 has a rom, no MCU
has an extra sprite layer, rowscroll, and a larger
tilemap. Tile data from both tile layers now comes
@ -2980,13 +3000,17 @@ ROM_START( dbreed )
ROM_LOAD( "db_k802m.20", 0x40000, 0x20000, CRC(055b4c59) SHA1(71315dd7476612f138cb64b905648791d44eb7da) )
ROM_LOAD( "db_k803m.30", 0x60000, 0x20000, CRC(8ed63922) SHA1(51daa8a23e637f6b4394598ff4a1d26f65b59c8b) )
ROM_REGION( 0x080000, "gfx2", ROMREGION_ERASE00 ) // same roms are duplicated at a0-a3 and b0-b3, confirmed
ROM_REGION( 0x080000, "gfx2", ROMREGION_ERASE00 )
ROM_LOAD( "db_k804m.a0", 0x00000, 0x20000, CRC(4c83e92e) SHA1(6dade027435c48ab48bd4516d16a9961d4dd6fad) ) /* tiles */
ROM_LOAD( "db_k805m.a1", 0x20000, 0x20000, CRC(835ef268) SHA1(89d0bb15201440dffad3ef745970f95505d7ab03) )
ROM_LOAD( "db_k806m.a2", 0x40000, 0x20000, CRC(5117f114) SHA1(a401a3e638209b32d4101a5c2e2a8b4612eaa21b) )
ROM_LOAD( "db_k807m.a3", 0x60000, 0x20000, CRC(8eb0c978) SHA1(7fc55bbe4d0923db88492bb7160a89de34e11cd6) )
ROM_REGION( 0x080000, "gfx3", 0 )
// actually need to confirm for sure these are present on some M81 PCBs, at least on the M81-B-B
// PCB they can be unpopulated with Jumper J3 set to S, forcing use of the above for both layers.
// it might actually be boards with them populated are X-Multiple conversions with the X-Multiple
// roms still here
ROM_LOAD( "db_k804m.b0", 0x00000, 0x20000, CRC(4c83e92e) SHA1(6dade027435c48ab48bd4516d16a9961d4dd6fad) ) /* tiles */
ROM_LOAD( "db_k805m.b1", 0x20000, 0x20000, CRC(835ef268) SHA1(89d0bb15201440dffad3ef745970f95505d7ab03) )
ROM_LOAD( "db_k806m.b2", 0x40000, 0x20000, CRC(5117f114) SHA1(a401a3e638209b32d4101a5c2e2a8b4612eaa21b) )
@ -3223,7 +3247,11 @@ ROM_START( hharry )
ROM_LOAD( "hh_a2.rom", 0x40000, 0x20000, CRC(b5b163b0) SHA1(82a708fea4953a7c4dcd1d4a1b07f302221ba30b) )
ROM_LOAD( "hh_a3.rom", 0x60000, 0x20000, CRC(8ef566a1) SHA1(3afb020a7317efe89c18b2a7773894ce28499d49) )
ROM_REGION( 0x080000, "gfx3", 0 ) // if this is an M81 PCB then these need to be duplicated here, verify
ROM_REGION( 0x080000, "gfx3", 0 )
// actually need to confirm for sure these are present on some M81 PCBs, at least on the M81-B-B
// PCB they can be unpopulated with Jumper J3 set to S, forcing use of the above for both layers.
// it might actually be boards with them populated are X-Multiple conversions with the X-Multiple
// roms still here
ROM_LOAD( "hh_b0.rom", 0x00000, 0x20000, CRC(c577ba5f) SHA1(c882e58cf64deca8eee6f14f3df43ecc932488fc) ) /* tiles */
ROM_LOAD( "hh_b1.rom", 0x20000, 0x20000, CRC(429d12ab) SHA1(ccba25eab981fc4e664f76e06a2964066f2ae2e8) )
ROM_LOAD( "hh_b2.rom", 0x40000, 0x20000, CRC(b5b163b0) SHA1(82a708fea4953a7c4dcd1d4a1b07f302221ba30b) )