How do you know if its the orginal Macintosh M0001 model?

Discussion in 'Apple Collectors' started by 802.11mac, Mar 16, 2010.

  1. 802.11mac, Mar 16, 2010
    Last edited: Nov 6, 2010

    802.11mac macrumors member

    802.11mac

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    Mar 16, 2010
    #1
    i recently bought a 1984 Macintosh model M0001 from ebay. I'm not sure though if this is the original M0001 model. i turned it on with the system disk and clicked on "About the Finder..". I see "512k" with "Version 4.1". What does it mean? it's supposed to be 128k, right? im not sure though.

    serial number: F4060AHM0001
     
  2. David Schmidt macrumors 6502

    David Schmidt

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    #2
    http://macfaq.org/cgi-bin/decoder.pl says this:
    "Your Macintosh 128 (M0001), with serial number F4060AHM0001, was the 357th manufactured during the 6th week of 1984 in Fremont, CA."
    I bet it was upgraded to 512k, but started out life with 128k. Does it have the battery holder on the back - and a bold, brown "Macintosh" word across the back?
     
  3. MacTech68, Mar 17, 2010
    Last edited: Jan 30, 2011

    MacTech68 macrumors 68000

    MacTech68

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    #3
    If it was a proper Apple Upgrade to 512K, these came with a new rear case with "Macintosh 512K" on the label on the rear.

    Sounds like you might have a "Third party" upgraded board. Hard to do, but I used to do these by removing all the 4164 memory chips (16 in all) and replacing them with 41256 memory chips and a small circuit board with a 74F253 (IIRC) for the extra address.

    If your rear case still says "Macintosh" then it should be original, just depends on if the Logic Board is a factory 512K (no sub-board) or an original 128K third party upgrade (with sub-board).

    I think I've got that right. 1984 was a while back.

    :)
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  4. mmfphotodude macrumors member

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    Toronto
    #4
    The original Mac, WOW. i have a 1986 Mac Plus...
     
  5. 802.11mac thread starter macrumors member

    802.11mac

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    Mar 16, 2010
    #5
    Yes.
     
  6. 802.11mac thread starter macrumors member

    802.11mac

    Joined:
    Mar 16, 2010
    #6
    i opened up my old mac, compared it with the original logic board at http://en.wikipedia.org/wiki/File:Macin ... rboard.jpg and i think they are the same board except for the memory expansion on mine.

    here are some pictures i took just now:
    [​IMG]
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    [​IMG]


    or you can go to http://www.flickr.com/photos/91379880@N ... 523929099/ for more pictures.

    Let me know what you think.
     
  7. dmr727 macrumors G3

    dmr727

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    #7
    Looks like you have a third party memory upgrade. That's not necessarily a bad thing though - it'll make the Mac quite a bit more useful.
     
  8. MacTech68, Mar 19, 2010
    Last edited: Jan 30, 2011

    MacTech68 macrumors 68000

    MacTech68

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    #8
    My guess is that you have a total of 1.5MB of RAM. If that's correct, not only does it have a third party upgrade, but part of that upgrade is to remove the original 4164 memory chips (the ones with the little white apples on them in the wikipedia photo).

    The R-C networks (Filters as they are marked on the logic board), are the earlier type, but the date of manufacture of the CPU is week 22 of 1984. IIRC, There would have been several weeks from then until the Mac was finished, so this logic board is more mid to late 1984. It's possible that the third party upgrade meant that the original logic board is sent in and you were given somebody else's with the upgrade already done - a common practice even today.

    The rest of the machine sure seems like a very early 1984 model. I'm jealous as my original front case has bad scratches where somebody used a scourer to remove a sticky label. :(
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