MOTM

>  > I forgot to mention that I measured the current draw at 103 mA on the
>>  positive supply and 28 mA on the negative supply (that's with 8 PROMs
>>  currently installed).
>
>What size are the PROMs? If they're fairly small, wouldn't it be
>easier, cheaper to have used a flash part like the Atmel AT29C040A or
>something with a larger capacity? Then you'd have less of them...

Oh oh, don't give Larry or Dave any more ideas. But the idea of 
having 128 or 256 PROMs at instant recall sure is tempting....

The PROMs are 64K bytes each.