MITS 8800B CPU Board Info

Randy McLaughlin cctalk at
Sat Jun 11 10:49:41 CDT 2005

From: "Dave Dunfield" <dave04a at>
Sent: Saturday, June 11, 2005 4:47 AM

> At 17:07 11/06/2005 +1000, you wrote:
>>I've got an old MITS 8800B CPU (Rev 0) board. It's in a pretty sad state 
>>missing some chips and most of the voltage regulation components. Although 
>>seen a few pics on the net of this board, none are clear enough to read 
>>If anyone has one of these boards can you pls tell me what chip D, F and K 
>>I think D is an 8216, and F is an 8224 clock chip, but would like 
>>A circuit diagram would be brilliant, if anyone has one.
> D: 8216
> F: 8224
> K: 8212

Jameco sells them:

> Rich Cini has a pile of Altair 8800B documentation on his site:
> Look under "Altair 8800 Emulation", then "Technical Links".
> You could also try Howard Hart's site:
> You may have to do a bit of digging, the 8800B CPU info may
> be buried in the 8800B system documentation.
> Regards,
> Dave
> -- 
> dave04a (at)    Dave Dunfield
> dunfield (dot)  Firmware development services & tools:
> com             Collector of vintage computing equipment:


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