Re: Compatibility of 1101A and 1101A1

[allison]

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  on behalf of Brad H 
> 
> 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.
>
>
>
>
>
>

Re: Compatibility of 1101A and 1101A1

[dwight]

Without looking at the 8008 specs, I'd assume either part would work.

Dwight



From: cctalk <cctalk-boun...@classiccmp.org> on behalf of Brad H 
<vintagecompu...@bettercomputing.net>
Sent: Friday, January 20, 2017 5:31:53 PM
To: 'General Discussion: On-Topic and Off-Topic Posts'
Subject: RE: Compatibility of 1101A and 1101A1

I'd assume 0.5mhz -- I have a plain 8008 (not 8008-1).

-Original Message-
From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of dwight
Sent: Friday, January 20, 2017 4:53 PM
To: General Discussion: On-Topic and Off-Topic Posts <cctalk@classiccmp.org>
Subject: Re: Compatibility of 1101A and 1101A1

What clock rate are you using?

Dwight



From: cctalk <cctalk-boun...@classiccmp.org> on behalf of Brad H
<vintagecompu...@bettercomputing.net>
Sent: Friday, January 20, 2017 4:24:26 PM
To: dst...@execulink.com; General Discussion: On-Topic and Off-Topic Posts
Subject: Re: Compatibility of 1101A and 1101A1



Ok.  I'm assuming they can work together then?  I have scoured the net and
found a couple of pics of mark-8 boards with a mix of 1101a and 1101a1.. or
maybe thats why they werent working? :)


Sent from my Samsung device

 Original message 
From: dst...@execulink.com
Date: 2017-01-20  2:54 PM  (GMT-08:00)
To: cctalk@classiccmp.org
Subject: Re: Compatibility of 1101A and 1101A1

On Fri Jan 20 15:19:24 2017 vintagecompu...@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.

RE: Compatibility of 1101A and 1101A1

[Brad H]

I'd assume 0.5mhz -- I have a plain 8008 (not 8008-1).

-Original Message-
From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of dwight
Sent: Friday, January 20, 2017 4:53 PM
To: General Discussion: On-Topic and Off-Topic Posts <cctalk@classiccmp.org>
Subject: Re: Compatibility of 1101A and 1101A1

What clock rate are you using?

Dwight



From: cctalk <cctalk-boun...@classiccmp.org> on behalf of Brad H
<vintagecompu...@bettercomputing.net>
Sent: Friday, January 20, 2017 4:24:26 PM
To: dst...@execulink.com; General Discussion: On-Topic and Off-Topic Posts
Subject: Re: Compatibility of 1101A and 1101A1



Ok.  I'm assuming they can work together then?  I have scoured the net and
found a couple of pics of mark-8 boards with a mix of 1101a and 1101a1.. or
maybe thats why they werent working? :)


Sent from my Samsung device

 Original message 
From: dst...@execulink.com
Date: 2017-01-20  2:54 PM  (GMT-08:00)
To: cctalk@classiccmp.org
Subject: Re: Compatibility of 1101A and 1101A1

On Fri Jan 20 15:19:24 2017 vintagecompu...@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.

Re: Compatibility of 1101A and 1101A1

[dwight]

What clock rate are you using?

Dwight



From: cctalk <cctalk-boun...@classiccmp.org> on behalf of Brad H 
<vintagecompu...@bettercomputing.net>
Sent: Friday, January 20, 2017 4:24:26 PM
To: dst...@execulink.com; General Discussion: On-Topic and Off-Topic Posts
Subject: Re: Compatibility of 1101A and 1101A1



Ok.  I'm assuming they can work together then?  I have scoured the net and 
found a couple of pics of mark-8 boards with a mix of 1101a and 1101a1.. or 
maybe thats why they werent working? :)


Sent from my Samsung device

 Original message 
From: dst...@execulink.com
Date: 2017-01-20  2:54 PM  (GMT-08:00)
To: cctalk@classiccmp.org
Subject: Re: Compatibility of 1101A and 1101A1

On Fri Jan 20 15:19:24 2017 vintagecompu...@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.

Re: Compatibility of 1101A and 1101A1

[Brad H]

Ok.  I'm assuming they can work together then?  I have scoured the net and 
found a couple of pics of mark-8 boards with a mix of 1101a and 1101a1.. or 
maybe thats why they werent working? :)


Sent from my Samsung device

 Original message 
From: dst...@execulink.com 
Date: 2017-01-20  2:54 PM  (GMT-08:00) 
To: cctalk@classiccmp.org 
Subject: Re: Compatibility of 1101A and 1101A1 

On Fri Jan 20 15:19:24 2017 vintagecompu...@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.

Re: Compatibility of 1101A and 1101A1

[Don Stalkowski]

On Fri Jan 20 15:19:24 2017 vintagecompu...@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.

Re: Compatibility of 1101A and 1101A1

[dwight]

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  on behalf of Brad H 

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.