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| Head hurts, IIvi versus IIvx |
Posted by: unity on 2017-01-16 17:59:47
820-0373-A = IIvx
820-0373-B = IIvi
Board part numbers. Can anyone confirm? I have a IIvx but its has a -B board. So wondering if swapped. If anyone else has a IIvi or IIvx and can post board part numbers that would be cool.
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Posted by: jsarchibald on 2017-01-16 18:13:27
Hmm, think it's been swapped on you, and not in a great way. Processor is half as fast as it should be.
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Posted by: unity on 2017-01-16 18:16:43
Well I decided to open it up further. Mine has an 030 at 33Mhz with an FPU. Good! So that is spec for a IIvx. Wonder why Apple advertised it at 32MHz?
So my guess is -A came out for IIvx. Then -B was a revision which was used for the:
IIvx (32mhz 030 with FPU) (replaced -A board)
IIvi (16Mhz with no FPU)
Performa 600 (32mhz with no FPU)
The ones with no FPU seem to have had a socket to add one. So this makes more sense, -B might be a more "universal" board to accommodate the 16Mhz 030?
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Posted by: unity on 2017-01-16 18:19:41
Forget that, found a -A board with an FPU socket which is captioned for a Performa 600. Oh well. Guess just a weird plethora of whatever Apple felt like doing... LOL
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Posted by: fri0701 on 2017-01-16 19:15:05
Not sure if you're still looking for these, but my IIvx has a 820-0373-B.
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Posted by: 360alaska on 2017-01-16 19:34:04
Here: https://drive.google.com/open?id=0B_Xp3uN-BcxsSHpXc1JNdWpiMHM
Pulled from a IIVX 820-0373-A
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Posted by: unity on 2017-01-16 19:42:46
Cool, thanks much guys. Keep em coming. I like puzzles like this.
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Posted by: Anonymous Freak on 2017-01-16 20:02:17
Apple advertised as 32 MHz because they went 'cheap' and used a 16 MHz chip to generate the clock for the CPU, doubled to 32 MHz on that model; even though the CPU itself was rated for 33 MHz.
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