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EEPROM recovery request

  • 05-10-2024 3:12pm
    #1
    EGBDF
    Registered Users, Registered Users 2 Posts: 16 ✭


    I originall posted this in electronics, but was advised to try here as well…

    Hi - can anyone advise me where I could get an EEPROM reprogrammed? I had a failed BIOS update on an old PC and now it's a brick. The EEPROM is a PLCC-32 package and I made a copy of the contents before I started. I'm in North Fingal.

    Thanks.



Comments

  • #2
    Steve X2
    Registered Users, Registered Users 2 Posts: 8,906 ✭✭✭Steve X2


    https://www.boards.ie/discussion/2058372493/eeprom-recovery-request

    What is the exact EEPROM type? A few of us have programmers, but knowing the chip helps to make sure our writers are compatible. It'll hopefully have something labelled on it like "Am27c256-90" or similar.



  • #3
    EGBDF
    Registered Users, Registered Users 2 Posts: 16 ✭EGBDF


    Thanks, the markings on the EEPROM are as follows:

    SST

    49LF040B

    33-4C-NHE

    0621176-CA

    I looked it up and it is a 4Mbit device. The backup I made is 512KB in size.

    Photo attached.

    015a6d7d-8a85-43f7-9a00-b3740aef55d3.jpg



  • #4
    KeRbDoG
    Registered Users, Registered Users 2 Posts: 4,335 ✭✭✭KeRbDoG


    i should be able to reprogram that for you if you want shoot me a PM



  • #5
    KeRbDoG
    Registered Users, Registered Users 2 Posts: 4,335 ✭✭✭KeRbDoG


    OP is sorted - I did spend a silly amount of time trying to get a large SuperPro programmer working to only fallback to a TL866 when I discovered I had the correct adapter after all.



  • #6
    Steve X2
    Registered Users, Registered Users 2 Posts: 8,906 ✭✭✭Steve X2


    Was the adapter the same as the one I've highlighted in red? I not had to use it yet and was wondering if erasing and reprogramming works well on it.

    5645646456464564.jpg



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  • #7
    KeRbDoG
    Registered Users, Registered Users 2 Posts: 4,335 ✭✭✭KeRbDoG


    https://www.boards.ie/discussion/comment/122705769#Comment_122705769

    Yup, thats the one - worked fine.

    While I was working on it, I then remembered using the same style chip in a cheap-mod/greenmod for the OG Xbox in the early 2000s. I think I had to use a PC and hotswap the EEPROM out/in with a machine that running to allow the initial flashing with a DOS command :) and more hotswapping/flashing with the Xbox OG when I made more cheapmods for friends. Good times



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