Head hurts, IIvi versus IIvx

[unity]

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.

 

[jsarchibald]

Hmm, think it's been swapped on you, and not in a great way.  Processor is half as fast as it should be.

 

[unity]

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?

 

[unity]

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

 

[fri0701]

Not sure if you're still looking for these, but my IIvx has a 820-0373-B.

 

[360alaska]

Here: https://drive.google.com/open?id=0B_Xp3uN-BcxsSHpXc1JNdWpiMHM

Pulled from a IIVX 820-0373-A

 

[unity]

Cool, thanks much guys. Keep em coming. I like puzzles like this.

 

[Anonymous Freak]

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.