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

802.11mac

802.11mac

macrumors member
Original poster
Mar 16, 2010
74
2
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
 
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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.

:)
________
X5 M
 
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MacTech68 said:
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.

:)
Click to expand...

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:







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

Let me know what you think.
 
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.
 
giolicious said:
i opened up my old mac, compared it with the original logic board at wikipedia.org and i think they are the same board except for the memory expansion on mine.

Let me know what you think.
Click to expand...

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. :(
________
Honda ST series specifications
 
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