Macintosh Plus ROM Chips in Macintosh 512K

Discussion in 'Apple Collectors' started by mikemike690, Feb 8, 2016.

  1. mikemike690 macrumors regular


    Apr 7, 2012
    New Zealand
    I've just brought a Macintosh Plus and soon to buy Macintosh 512K, the Plus has corrosion from battery leakage but I'm pretty sure the ROM chips will still be good hopefully, am I able to unsolder these Plus chips and solder them into my 512K? Thanks.
  2. MacTech68 macrumors 68020


    Mar 16, 2008
    Australia, Perth
    Yes, indeed you can, but you should really swap them as a pair. There are two ROMs (HI and LOW), and the revisions of each one need to match a certain pairing.

    However, to find out which ROM is bad, you should be able to swap one at a time.

    It will create other odd errors if you have an unmatched pairing as a permanent fix.

Share This Page