15 Aug
2006
15 Aug
'06
5:58 p.m.
Subject: Re: PDP-8 /e/f/m memory
From: "Ethan Dicks" <ethan.dicks at gmail.com>
Date: Wed, 16 Aug 2006 12:13:16 +1200
To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at
classiccmp.org>
On 8/15/06, vrs <vrs at msn.com> wrote:
> From: "Ethan Dicks" <ethan.dicks at gmail.com>
> > OK. Is a DEC005 OMNIBUS-friendly? We used them on our Qbus COMBOARD,
> > so that's the context I think of them in.
>
> Interesting question, even though I'd never design in a DEC005. They are
> made of even more unobtainium than the regular tranceivers!
I have a selection of DEC0XX parts on hand from my days in the mill.
Agreed. I have a few, but I used to make Qbus cards.
For most folks,
the only source is other cards.
Or plain TTL. LS241 is a good reciever for Q, U or Omnibus (Schmitt inputs)
and 74LS38 makes a good open collector driver. There are others.
Allison
16 Aug
16 Aug
5:24 p.m.
Is it a bad idea to try and salvage/reuse the DC021 bus transceivers off
the CXY08 boards that seem to be so common and useless?
Doug
On 8/15/06, vrs
<vrs at msn.com> wrote:
> From: "Ethan Dicks" <ethan.dicks at gmail.com>
> > OK. Is a DEC005 OMNIBUS-friendly? We used them on our Qbus COMBOARD,
> > so that's the context I think of them in.
>
> Interesting question, even though I'd never design in a DEC005. They are
> made of even more unobtainium than the regular tranceivers!
I have a selection of DEC0XX parts on hand from my days in the mill.
Agreed. I have a few, but I used to make Qbus
cards. For most folks,
the only source is other cards.
Or plain TTL. LS241 is a good reciever for Q, U or Omnibus (Schmitt inputs)
and 74LS38 makes a good open collector driver. There are others.
Allison
24 Aug
24 Aug
4:26 a.m.
New subject: dc021, was : Re: PDP-8 /e/f/m memory
At 06:19 PM 8/23/2006, you wrote:
Douglas Taylor wrote:
I don't, I only suggested this because the CXY08 print sheets are available
in the archive and it looks like a compact simple Qbus interface.
Is it a bad idea to try and salvage/reuse the
DC021 bus transceivers off
the CXY08 boards that seem to be so common and useless?
Doug
Anybody has a datasheet for them ? 
10:37 a.m.
New subject: dc021, was : Re: PDP-8 /e/f/m memory
Douglas Taylor wrote:
At 06:19 PM 8/23/2006, you wrote:
DC021 is in the "Digital Semiconductor Databook 1987 Volume 1".
If it's not yet on Manx, I can supply just the relevant pages
(the entire thing is quite large).
Antonio
Douglas Taylor wrote:
I don't, I only suggested this because the CXY08 print sheets are
available in the archive and it looks like a compact simple Qbus
interface. Is it a bad idea to try and salvage/reuse the
DC021 bus
transceivers off the CXY08 boards that seem to be so common and
useless?
Doug
Anybody has a datasheet for them ? 
11:42 a.m.
New subject: dc021, was : Re: PDP-8 /e/f/m memory
Antonio Carlini wrote:
Douglas Taylor wrote:
Didn't know they were still printing books in 1987 ;-)
But if you could scan it, it would be great !
Thanks
At 06:19 PM 8/23/2006, you wrote:
DC021 is in the "Digital Semiconductor Databook 1987 Volume 1".
If it's not yet on Manx, I can supply just the relevant pages
(the entire thing is quite large).
Douglas Taylor wrote:
I don't, I only suggested this
because the CXY08 print sheets are
available in the archive and it looks like a compact simple Qbus
interface. Is it a bad idea to try and salvage/reuse the
DC021 bus
transceivers off the CXY08 boards that seem to be so common and
useless?
Doug
Anybody has a datasheet for them ?
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