Compatibility of 1101A and 1101A1

allison ajp166 at
Fri Jan 20 16:25:59 CST 2017

On 01/20/2017 04:49 PM, dwight wrote:
> Most often, a number past the letter meant the speed.
> Usually a 1 indicated 100 ns but I don't know if that makes
1101s never hit 100ns.....  The  slow parts were slower than 1uS
and the were some fast parts at 800ns.

Ever occur to look up the data sheet?

> sense for 1101As. I suspect it still means something related
> to the speed but I'm not sure what speed that might be.
Speed select but it varies with vendor and rough year.  For intel in the
mid 70s
I think that was 1uS from memory but the 8008 is so slow that should be
enough.  The slowest had no trailing suffux and that was 1.6us

> My guess is that it would work at some speed.
> Dwight
> ________________________________
> From: cctalk <cctalk-bounces at> on behalf of Brad H <vintagecomputer at>
> Sent: Friday, January 20, 2017 12:19:24 PM
> To: 'General Discussion: On-Topic and Off-Topic Posts'
> Subject: Compatibility of 1101A and 1101A1
> I have some C1101A RAMs I was planning to use in my Mark-8 project.  I'm
> having trouble finding more, as previously mentioned because the price has
> shot up so much.  I'm wondering, I'm finding lots of P1101A1 RAMs with the
> correct date codes.. are those compatible with C1101A/P1101A?  I don't
> understand what the 1 at the end signifies.

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