MicroVAX 2000 ROM placement question

Ethan Dicks ethan.dicks at gmail.com
Wed Sep 15 21:59:02 CDT 2010


On 9/15/10, allison <ajp166 at verizon.net> wrote:
> On 09/15/2010 10:22 PM, Ethan Dicks wrote:
>> The stickers say...
>>
>> 23-092E7-00 | ABOfy/w8851 | digital |
>> 23-093E7-00 | ABOfy/w8850 | digital |
>> 23-094E7-00 | ABOfy/w8852 | digital |
>> 23-095E7-00 | | |
>
> The 23-09xE7-00 is the magic number...

Right.  That's the pattern I recognize from other products.

> the abo is where

Aha!

> and the 8852 is 1988 week 52.

I wouldn't have guessed that, being so late in the year.

> If memory serves the 2-5 is sequential as are the sockets.

Sequential makes sense, but there are no E-numbers on the board to
match up with the sockets.  I pored over the schematics (on bitsavers)
and know what the designations are for each group of 8 bits (D0-D7,
D8-D15...) but it's the correlation that was eluding me.

Thanks for all the info folks.  This is really helping.

-ethan



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