Discussion DreamCast R&D and Documenting

Discussion in 'Other' started by Shank, May 16, 2017.

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  1. Nold C L U B C L A M S H E L L Staff Member . .

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    oh than one.. i thought you ment the e2 controller chip itself... anyways there is a pinout for your stuff in my two dc guides, too. :D
     
  2. TrueSonic45 .

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    Can I get a link, my G?
     
  3. RDC .

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    For disabling that 'protection circuit' in the DC, which just keep the OE of IC305 Hi so the clocks stay running. It's a thermal fuse in the VA0 and then the fan RPM signal in the VA1 and VA2.1 boards..

    VA0 board, you can install a 1k at R345 (top side of board at CN301) or jumper it closed.

    VA1 board, just put a 1k or so Resistor in the R627 spot (bottom of board around IC601) or just jumper it closed if you want. This makes IC601, R613, D605 and CE601 all pretty much useless and they can be removed if desired.

    VA2.1 board, just about the same as the VA1, but IC601 is on the top side of the board, while R627 is on the bottom side of the board around the same area. Install a 1k or jumper it closed and no fan is needed.


    Pinout for CN601 on the motherboards..

    VA0

    1 - GND
    2 - 5v
    3 - 5v
    4 - 5v
    5 - GND
    6 - A0
    7 - B0
    8 - GND
    9 - A1
    10 - B1
    11 - GND
    12 - A2
    13 - B3
    14 - GND
    15 - A3
    16 - B3
    17 - GND
    18 - LED
    19 - Batt VCC (for charging batt)
    20 - Batt VCC

    VA1 and VA2.1

    1 - LED
    2 - Batt VCC
    3 - A0
    4 - B0
    5 - GND
    6 - A1
    7 - GND
    8 - B1
    9 - A2
    10 - B2
    11 - GND
    12 - A3
    13 - GND
    14 - GND
    15 - B3
    16 - GND
    17 - 5v
    18 - 5v
    19 - 5v
    20 - Fan RPM
     
    Nold likes this.
  4. Nold C L U B C L A M S H E L L Staff Member . .

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    Holy shit.. welcome - this is a damn nice first post! Hope there are much more to come! :)
     

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