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Add PCB layout for the main board in chinagat.cpp
This patch updates the PCB Layout comment to have layout information and simple explanations for the main board.
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@ -73,6 +73,71 @@ Dip locations and factory settings verified with China Gate US manual.
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PCB Layout
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----------
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TA-0023-P1-03 (Main Board)
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|-----------------------------------------------------|
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| | J1 | | J2 | |
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| ---------------- ---------------- |
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| X1 |
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| LH0080A |
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| HD68B09EP HD68B09EP |
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| 23J0-0 (main) (sub) 23J6-0 |
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| YM2151 23J5-0 |
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| 23J1 23J2 23J3-0 23J4-0 |
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| -0 -0 |
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| YM3012 M6295 |
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| X2 |
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| SW2 SW1 |
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| VR1 |-------------------| |
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| | || JAMMA | |
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|----------------|---||--------------|----------------|
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Clock
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X1 - 3.579545MHz
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X2 - 1.056MHz
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CPUs
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HD68B09EP - HITACHI 6809E for main
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HD68B09EP - HITACHI 6809E for sub
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LH0080A - SHARP Z80 for sound
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Sound
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YM2151 - YAMAHA FM sound
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YM3012 - YAMAHA DAC for YM2151
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M6295 - OKI ADPCM
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PROM
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23J5-0 - user1 (82S129)
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ROMs
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23J0-0 - soundcpu EPROM
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23J1-0 - oki mask ROM
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23J2-0 - oki mask ROM
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23J3-0 - maincpu EPROM
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23J4-0 - sub EPROM
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23J6-0 - gfx1 mask ROM
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SRAMs
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not listed yet
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Others
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VR1 - Speaker volume
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SW1 - DIPSW1
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SW2 - DIPSW2
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JAMMA - Standard JAMMA connector
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TA-0023-P2-03 (Video Board)
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|-----------------------------------------------------|
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| | J2 | | J1 | |
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@ -104,29 +169,29 @@ TA-0023-P2-03 (Video Board)
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|-----------------------------------------------------|
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Clock
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X1 - 12MHz
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X1 - 12MHz
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PROM
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23JB-0 - user1 (82S131)
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23JB-0 - user1 (82S131)
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ROMs
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23J7-0 - gfx2 mask ROM
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23J8-0 - gfx2 mask ROM
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23J9-0 - gfx2 mask ROM
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23JA-0 - gfx2 mask ROM
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TJR-100 - gfx3 custom ROM (undump)
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23J7-0 - gfx2 mask ROM
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23J8-0 - gfx2 mask ROM
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23J9-0 - gfx2 mask ROM
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23JA-0 - gfx2 mask ROM
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TJR-100 - gfx3 custom ROM (undump)
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SRAMs (2KBx8bits) Motorola MCM2016HN55, SANYO LC3517?
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IC7 - ?
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IC40 - bgvideoram
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IC70 - ?
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IC75 - ?
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IC78 - ?
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IC106 - ?
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IC7 - ?
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IC40 - bgvideoram
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IC70 - ?
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IC75 - ?
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IC78 - ?
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IC106 - ?
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Connectors
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J1, J2 - 50pins, almost same assignments with ones for Double Dragon.
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At this moment, 17pin is known to be used for TRJ-100.
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J1, J2 - 50pins, almost same assignments with ones for Double Dragon.
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At this moment, 17pin is known to be used for TRJ-100.
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TRJ-100 pin assigns
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