20 Jan
2017
20 Jan
'17
12:19 p.m.
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.
20 Jan
20 Jan
1:49 p.m.
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.
2:25 p.m.
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
fast
enough. The slowest had no trailing suffux and that was 1.6us
Allison
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.
2:54 p.m.
On Fri Jan 20 15:19:24 2017 vintagecomputer at bettercomputing.net (Brad H) wrote:
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.
According to my TI manual the 1101A is 1500 ns while the A1 is
1000 ns.
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