What kind errors does it have?
Actually by the name of this thread I was hoping for the information what is exactly differences between the boards, so far I found this info:
Dates are likely from copyright of the first version on the market.
M-72 (1987?) 3 PCB stack:
Main CPU: V30 (@ 8 Mhz)
MCU Intel 8751 (@ 8 MHz)
Sound CPU: Zilog Z80 (@ 3.579545 Mhz)
Sound Chips: Yamaha YM2151 (@ 3.579545 Mhz), 8-Bit R-2R DAC
Video Type raster, resolution 384×256@55,017606 Hz, CRT 15kHz, pixel clock @8 MHz
1987
Battle Chopper (World) [BCHOPPER.ZIP] /
Mr. HELI no Dai-Bouken (Japan) [MRHELI.ZIP], M72-B-D (bottom) / M72-A-C (middle) / M72-C-A (top),
horizontal, 2x Joysticks 8D, 4B, MCU dumped
1987
R-Type (US) [RTYPEU.ZIP] /
R-Type (Japan) [RTYPEJ.ZIP], M72-B-D (bottom) / M72-A-C (middle) / M72-ROM-C (top),
horizontal, 2x Joysticks 8D, 4B, no Protection because no MCU, no sample playback because no DAC (M72-ROM-C not M72-C-A)
1988
Image Fight (World) [IMGFIGHT.ZIP] /
Image Fight (Japan) [IMGFIGHTJ.ZIP], M72-B-D (bottom) / M72-A-C (middle) / M72-C-A (top)
vertical 270°, 2x Joysticks 8D, 4B, MCU dumped
1988
Ninja Spirit (World) [NSPIRIT.ZIP]/
Saigo no Nindou (Japan) [NSPIRITJ.ZIP], M72-B-D (bottom) / M72-A-C (middle) / M72-C-A (top)
horizontal, 2x Joysticks 8D, 4B, World MCU
not dumped, Japan MCU dumped
1989
Dragon Breed (World, M72) [DBREEDM72.ZIP] /
Dragon Breed (Japan, M72) [DBREEDJM72.ZIP], M72-B-D (bottom) / M72-A-C (middle) / M72-C-A (top)
horizontal, 2x Joysticks 8D, 4B, World MCU
not dumped, Japan MCU dumped
1989
Legend of Hero Tonma (World) [LOHT.ZIP] /
Legend of Hero Tonma (Japan) [LOHTJ.ZIP], M72-B-D (bottom) / M72-A-C (middle) / M72-C-A (top)
horizontal, 2x Joysticks 8D, 4B, MCU dumped
1989
X Multiply (Japan, M72) [XMULTIPLM72.ZIP], M72-B-D (bottom) / M72-A-C (middle) / M72-C-A (top)
horizontal, 2x Joysticks 8D, 4B, different addressing PALs/memory map, MCU dumped
1990
Air Duel (World, M72) [AIRDUELM72.ZIP] /
Air Duel (Japan, M72) [AIRDUELJM72.ZIP], M72-B-D (bottom) / M72-A-C (middle) / M72-C-A (top),
vertical, 2x Joysticks 8D, 4B, MCU dumped
1990
Daiku no Gensan (Japan, M72) [DKGENSANM72], M72-B-D (bottom) / M72-A-C (middle) / M72-C-A (top),
horizontal, 2x Joysticks 8D, 4B, normal M72 memory map, but IRQ vectors and sprite control as in X-Multiply, MCU
not dumped
M-73 (1991?) Same as M-72? 3 PCB stack:
1991
Gallop : Armed Police Unit (Japan, M72) [GALLOPM72], horizontal, 2x Joysticks 8D, 4B, no Protection sample playback only, MCU
not dumped
M-81 (1989?) 2 PCB stack:
1989
Dragon Breed (World, M81) [DBREED.ZIP], M81-A-B + M81-B-B, horizontal, 2x Joysticks 8D, 4B
1989
X Multiply (World, M81) [XMULTIPL.ZIP], M81-A-B + M81-B-B, horizontal, 2x Joysticks 8D, 4B
1990
Hammerin' Harry (World, M81) [HHARRY.ZIP], M81-A-B + M81-B-B, horizontal, 2x Joysticks 8D, 4B
M-82 (1990?) 2 PCB stack, no MCU, Z80 ROM:
Board has an extra sprite layer, rowscroll, and a larger tilemap. Tile data from both tile layers now comes
from a single set of ROMs, flip bits moved to 2nd word meaning max of 0xffff tiles.
1989
R-Type II (Japan) [RTYPE2J.ZIP?], (M82-A-A + M82-B-A? Bootleg?), horizontal, 2x Joysticks 8D, 4B
1990
Air Duel (World, M82) [AIRDUEL.ZIP], M82-A-A + M82-B-A, vertical, 2x Joysticks 8D, 4B
1990
Daiku no Gensan (Japan, M82) [DKGENSANM82.ZIP], M82-A-A + M82-B-A, horizontal, 2x Joysticks 8D, 4B
1990
Major Title (Japan) [MAJTITLEJ.ZIP?], M82-A-A + M82-B-A, horizontal, 2x Joysticks 8D, 4B, uses M82/M84 features
M-84 (1991?) 2 PCB stack, no MCU, Z80 ROM:
1989
R-Type II (World) [RTYPE2.ZIP?], M84-A-A + M84-B-A, horizontal, 2x Joysticks 8D, 4B
1990
Hammerin' Harry (US, M84) [HHARRYU.ZIP], M84-A-A + M84-C-A, horizontal, 2x Joysticks 8D, 4B
1990
Major Title (World) [MAJTITLE.ZIP?], horizontal, 2x Joysticks 8D, 4B, uses M82/M84 features
1991
Cosmic Cop (World) [COSMCCOP.ZIP], M84-D-B + M84-B-B, horizontal, 2x Joysticks 8D, 4B, V35/No IRQ controller
1991
Ken-Go (Japan) [KENGOJ.ZIP]/(World) [KENGO.ZIP]/(Set 2) [KENGOA.ZIP], M84-D-B + M84-B-B, horizontal, 2x Joysticks 8D, 4B, Encrypted, V35/No IRQ controller
M-85 (1990?) 2 PCB stack:
possibly just M84 with a modified sound section?
most Jamma inputs not connected, trackball only
1990
Pound For Pound (Japan) [POUNTFORJ.ZIP]/(World) [POUNTFORU.ZIP]/(US) [POUNTFOR.ZIP], vertical 270°, 2x Trackball 2B
All this boards seem to are specked:
CPU : V30 @ 8 MHz - Sound CPU : Z80 @ 3.579545 MHz - Sound Chip : YM2151 @ 3.579545 MHz
Code:
IRQ controller
--------------
The initialization consists of one write to port 0x40 and multiple writes
(2 or 3) to port 0x42. The first value written to 0x42 is the IRQ vector base.
Cosmic Cop and Ken-Go have a V35 CPU with its own IRQ controller built in.
Game irqbase 0x40 0x42
---- ------- ---- ----------
rtype 0x20 17 20 0F
bchopper " " "
nspirit " " "
loht " " "
rtype2 " " "
airduel " " "
gallop " " "
imgfight 0x20 17 20 0F 06
majtitle " " "
poundfor 0x20 17 20 0F 0A
xmultipl 0x08 13 08 0F FA
dbreed " " "
hharry " " "
various NANAO marked customs:
KNA91H014 found on M72, M75, M81, M82, M84, M85,
https://www.arcade-projects.com/thr...irem-pallet-ram-chip-repro-any-interest.6862/ (palette chip)
KNA70H015 (11) found on M72, M81, M82, M84 and M85, Replica:
https://www.tindie.com/products/caiusarcade/kna70h01511-replacement/ (Video counter)
KNA70H016 (12) found on M72, M81, M82, M84 and M85, Replica:
https://www.tindie.com/products/caiusarcade/kna70h01612-replacement/ (DMA controller and sprite?)
KNA71H009 (13)
KNA72H010 (14) (sprites ?)
KNA71H010 (15) (background tiles?)
KNA65005-17 found on M72, M81, M82, M84 and M85, Replica:
https://www.tindie.com/products/caiusarcade/kna65005-17-replacement/ (sprite related)
KNA6034201 found on M62 and M72, Replica:
https://www.tindie.com/products/caiusarcade/kna6034201-replacement/
KNA6032601 found on M57 and M62, Replica:
https://www.tindie.com/products/caiusarcade/kna6032601-replacement/
KNA6032701 found on M62, M72 and M75, Replica:
https://www.tindie.com/products/caiusarcade/kna6032701-replacement/
KNA6021901 found on M62 and M75, Replica:
https://www.tindie.com/products/caiusarcade/kna6021901-replacement/
Custom resistor ladder reproduction for M72, M75, M92, M107 RGLD8M472J221J - RGSD10L471G
https://www.jammarcade.net/vigilante-repair-log-and-irem-rgld8m472j221j-rgsd10l471g-reproduction/