Expansion Port

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The PC Engine Expansion Port

The PC Engine expansion includes pins for just about everything, including the entire cartridge port, RGB, audio, video and a few other things. It also has access to the communications between the video chip and the CPU.



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CSNDRGNDHuDCEKA17A13A11GNDD2D4D6D7A1A3A4A6GNDA15A19GNDVoutSyncBlu
BSNDinCDDHSM/WRVUA8/OED0D3D5HSnA0A2VD6A5A7A12A16A20/RDYIRQ2/RSTGrn
ASNDLVoutVSA18A14A9A10D1DCKVSnVinVD8VD7VinVD5VD4VD3VD2VD1VD0GNDVidRed
    Power    Audio/Video    Data Bus    Address Bus    System Functions    Video Bus (?)


The PC Shuttle Expansion Port

The PC Engine Shuttle had a cut-down expansion connector. The primary change is the removal of the video bus pins and the IRQ2 pin, preventing the Shuttle from using a CD ROM peripheral.

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CGNDVoutA07A04A01GNDD2D5GNDA10A08A17GND/OECDDGND
BGNDVoutA12A05A02GNDD1D4D7A20A09A14GNDHSMVoutGND
AA19A16A15A06A03A00D0D3D6GNDA11A13A18/WRVout/RST
    Power    Data Bus    Address Bus    System Functions