> On Jul 17, 2019, at 3:56 PM, Eric Smith via cctalk
> wrote:
>
> I expect that 70ns doesn't meed the DEC purchase specification for
> 23-000A9-01, but unless we turn up a copy of the actual purchase
> specification, we won't really know. It seems likely that the purchase
> specification
At 70ns, I can make the design pretty simple by using an EEPROM. I did some
trial synthesis targeting a Lattice MachXO2 part, and I think I could get the
speed down into the 20ns range that way, at the cost of a more complex board
design and needing to use Lattice's synthesis tool to prepare
On Wed, Jul 17, 2019 at 4:31 PM Bob Smith wrote:
> https://datasheetspdf.com/pdf-file/541962/AMD/AM27S13/1
> Listed as a 50NS part
> 27S32 is listed at 70NS part.
>
70ns is the mil temp range rating for the 27S32; the commercial spec is 55
ns.
70ns parts would probably work fine in an M9312, as
https://datasheetspdf.com/pdf-file/541962/AMD/AM27S13/1
Listed as a 50NS part
27S32 is listed at 70NS part.
On Wed, Jul 17, 2019 at 2:59 PM Eric Smith via cctalk
wrote:
>
> On Wed, Jul 17, 2019 at 9:43 AM Mark J. Blair via cctalk <
> cctalk@classiccmp.org> wrote:
>
> > > On Jul 17, 2019, at 1:20
On Wed, Jul 17, 2019 at 9:43 AM Mark J. Blair via cctalk <
cctalk@classiccmp.org> wrote:
> > On Jul 17, 2019, at 1:20 AM, Paul Birkel wrote:
> > From some notes (origin misplaced!) you'll need a typical access time of
> > 40ns from address, or 20ns from /CS:
>
> Thank you! That rules out using a
> On Jul 17, 2019, at 1:20 AM, Paul Birkel wrote:
> From some notes (origin misplaced!) you'll need a typical access time of
> 40ns from address, or 20ns from /CS:
Thank you! That rules out using a 70ns EEPROM, then.
I think I have a line on most of the bootstrap PROMs that I will need, but
-Original Message-
From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Mark J.
Blair via cctalk
Sent: Tuesday, July 16, 2019 4:10 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: DEC Purchase Specifications, particularly 23-000A9-01
.
If 70ns access time
Don't know if you are aware of this data, might just give you some hints.
http://www.ak6dn.com/PDP-11/M9312/
On Tue, Jul 16, 2019 at 4:19 PM Bill Degnan via cctalk
wrote:
>
> On Tue, Jul 16, 2019 at 4:10 PM Mark J. Blair via cctalk <
> cctalk@classiccmp.org> wrote:
>
> > I've been studying
On Tue, Jul 16, 2019 at 4:10 PM Mark J. Blair via cctalk <
cctalk@classiccmp.org> wrote:
> I've been studying scanned documents for the M9312 UNIBUS
> bootstrap/terminator card because of reasons. They refer to Digital
> Equipment Corporation Purchase Specifications 23-000A9-01 and 23-000F1-01
>
I've been studying scanned documents for the M9312 UNIBUS bootstrap/terminator
card because of reasons. They refer to Digital Equipment Corporation Purchase
Specifications 23-000A9-01 and 23-000F1-01 for the PROMs, and I'm wondering
whether those documents have been preserved anywhere? I'd love
10 matches
Mail list logo
