Compatibility of 1101A and 1101A1

Most often, a number past the letter meant the speed. Usually a 1 indicated 100 ns but I don't know if that makes sense for 1101As. I suspect it still means something related to the speed but I'm not sure what speed that might be. My guess is that it would work at some speed. Dwight ________________________________ From: cctalk <cctalk-bounces at classiccmp.org> on behalf of Brad H <vintagecomputer at bettercomputing.net> 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.