(Topic ID: 267256)

Combo ROM for original MPU boards

By oldschoolbob

3 years ago


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  • 29 posts
  • 11 Pinsiders participating
  • Latest reply 3 years ago by barakandl
  • Topic is favorited by 2 Pinsiders

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    #15 3 years ago
    Quoted from cudabee:

    That has been done like 20 years ago by a company named twobits.
    Device was called fixit and it was a really neat board with lot of potential, however almost nobody has heard of it i think.
    It was priced right at $70 but unfortunaly the owner would not ship to Europe otherwise i would have bought a dozen. I have bought one through ebay, and i have used it for years and love it.
    2 or 3 years ago Twobits was sold to Gameboards usa, i inquired immediately with them and they ship to Europe but they raised the price to $120 which is too much i think for what it is.[quoted image]

    I have one of those & I had to get it via eaby too & use a parcel forwarding service to get it to Australia.

    They are quite handy, I used it a few times.

    Twobits were also the first to make the -35 repro MPUs I think, I have one of those MPUs as well.

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    #17 3 years ago
    Quoted from oldschoolbob:

    Joydivision, Do you have a photo of the FixIt installed on a board?
    Thanks
    Bob

    Here it is plugged into J5 in a working -17 mpu.
    I switched the Fixit to test mode & the Fixit verified the RAM & ROMS were working. I removed a ROM & then the 5101 RAM & it failed the test on both. I really didn’t think these worked on a -17 as well as a -35 as pins 33 & 34 are not present on a -17. Seemed to work.
    The available tests are for ROMS, RAM & the reset section only. Which typically covers most of the common faults with these MPUs.
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    #21 3 years ago
    Quoted from oldschoolbob:

    The way I understand it, it runs diagnostics, it eliminates the RAM, the ROMs, the reset circuit, and the battery.

    Yes, main use really is to check & eliminate problems associated with the reset circuit, ROMS or ROM sockets on a locked board. Remembering the design of these boards are more than 20 years old, so I guess that's why the thing is so big.

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