Carbon (or Silicon, as the case may be) Dating an Apple IIgs ROM 3's Production Date by Apple Computers?

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Offline
Joined: Jul 17 2011
Posts: 25

Dear AppleFritter Members,
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I'm wondering whether 1 of the several numbers printed on my Apple IIgs ROM 3's Circuit Board will reflects information about the month and year (or at least the year) when Apple Computers manufactured this particular IIgs ROM 3 CPU.
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I don't see the year of production printed anywhere on this Apple IIgs ROM 3's Circuit Board (as I have seen printed on, for example, an Apple //e Enhanced's Circuit Board).
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With so many numbers printed on my Apple IIgs ROM 3's Circuit Board, I can't tell even which number is its Serial Number (to the extent that the Serial Number may be the key number in determining this particular Apple IIgs ROM 3's Production Date by Apple Computers.
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If none of the numbers printed on my Apple IIgs ROM 3's Circuit Board will determine its Production Date by Apple Computers, then is there any sort of physical difference in the configuration and/or components found on the subset of ROM 3 Apple IIgs Circuit Boards (i.e. were there more than 1 Revision of the ROM 3 Subset of Apple IIgs Circuit Boards (I believe that the ROM 3 Apple IIgs Computers all were sold from 1989 through 1992), such that I could utilize that either to determine my ROM 3's Production Date by Apple Computers, or at least to determine this ROM 3 Circuit Board's relative Production Date compared to other ROM 3 Circuit Boards?
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Thanks - I'd appreciate any information about this question that AppleFritter Members may be able to reply with.

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Offline
Joined: Dec 20 2003
Posts: 359
Re: Carbon (or Silicon, as the case may be) Dating an Apple ...

None of the numbers printed on the motherboard is the production date. They stamped the date on. Remove the power supply and right near the speaker you'll see the motherboards production date stamped

Dog Cow's picture
Offline
Joined: Dec 11 2008
Posts: 463
Re: Carbon (or Silicon, as the case may be) Dating an Apple ...

The date code on the ICs will also give an approximation of date. The 4 digit code uses two digits to denote year (assume century is 19) and the last two digits to mark the week of production (1-52).

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