20 Aug
2014
20 Aug
'14
5:18 p.m.
On Wed, Aug 20, 2014 at 3:20 PM, Tony Duell <ard at p850ug1.demon.co.uk> wrote:
To return to the original question, I beleive the
contents of those PROMs
are in the printset. Just not obviously.
The APROMs are part of the microcode, the format of the microcode word is
in the pritnest I looekd in on bitsavers. As is the microcode binary
listing. So you have to extract the appropriate bits from that listing.
It's only 256 locations...
Thanks, Tony. I actually realized that late last night (and I feel like an
idiot for overlooking it). I've transcribed the ALU column over to a text
file and now I just need to reorder it by address (rather than by symbol)
and convert it into a binary.
The PROms are 256*4 bipolar PROMs. Various companies made them, they all
should be equivlaent when reading, but nor when programming. So if you
get some, make sure your programmer can handle that brand.
Worked that out last night too (it was a very productive evening :)). I
found some NOS MMI 6300s for a reasonable price and they're on their way.
My ancient Data I/O Model 29 w/Unipak 2 should be able to program them. I
hope I don't need to replace too many of these...
- Josh
-tony