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(Topic ID: 212222)

Help me ID this Williams MPU (Solved)

By OwenKhan

6 years ago


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  • 23 posts
  • 10 Pinsiders participating
  • Latest reply 6 years ago by CNKay
  • Topic is favorited by 1 Pinsider

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    #9 6 years ago
     
    DIK

    someotherguy

    Pinside member

    6y 44,150 419

    Quoted from mbaumle:

    Not possible. System 7s have a 7-segment LED indicator.

    If you look closely, the board on IPDB has solder pads underneath, OP's does not. Though the System 3 and 4 boardsets are nearly identical, aside from the System 4 having sockets at IC14 and IC26. If I had to guess, it's either a later System 3 board converted to a System 4 board, or just a straight up System 4 board since it has a socket in the rightmost position of the ROM section.

    Yeah, dead giveaway not a system 7.

    On a system 3 converted to system 4...I dunno. Can you do that? It's got the ROM socket under the battery holder, I thought system 3's don't even have a spot for that.

    So, system 4...or it's possibly the converted 3 as mbaumle says.

    Richard

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    #11 6 years ago
     
    DIK

    someotherguy

    Pinside member

    6y 44,150 419

    News to me! But I don't know a hell of a lot about anything pre-system 6. I had thought none of the 3's had the socket, or even the solder pads to add one.

    Richard

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    #17 6 years ago
     
    DIK

    someotherguy

    Pinside member

    6y 44,150 419

    Quoted from wdennie:

    Funny some one with a problem with there flash, sys 4 looks like his, and go to IPDB hand the flash sys 4 has battery's on the opposite side.

    That Flash on IPDB doesn't have the original MPU in it, much like OP's Blackout doesn't, either. Just a difference of newer-than-original MPU in one, older-than-original MPU in another.

    It's a really low-res pic but the Flash looks like it has a system 6 MPU in it, not original.

    Richard

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