16 Jun
2004
16 Jun
'04
3:43 p.m.
On Wed, Jun 16, 2004 at 07:55:46PM -0700, vrs wrote:
I wrote:
Neat. I'm not sure I'd heard that.
I forget who, but someone has built a one-off
DF-32 implementation in TTL
with a Dallas battery-backed NVRAM...
That was done by Charles Morris, and I now own the prototype. I am working (intermittently) on a related design for
an RF08 replacement.
So I recall.
(If someone can help me with the indicator panel for
the RF08 replacement,
I'd appreciate it.)
Sorry... can't help with that. I have 2 DF-32s and 2 DS-32s and plenty of
docs, but not a thing related to any of the larger RF drives. I've never
even seen more than a picture of an RF08.
The implementation bug (in Rev A) was that the
"skip on no error" was
implemented as "skip on error", RF08 style.
That was it. Thanks.
I also have stuff that may never see implementation
(like my TC08 replica),
and an EAGLE library of DEC Gxxx and Mxxx modules (both as components for
projects like the TC08 replica and as individual boards you could have
produced).
Never say never... now a generic Mxxx board with, say, 4 16-pin sockets
and a double row of 32 pads might be handy - one set mapped to the sockets,
the other set mapped to the fingers - drop in the necessary chips and wire
up the pads... that would be nice to have for certain projects (like adding
an EAE or memory extension hardware). It would, in fact, resemble a paddle
card for a 40-pin cable like we've been talking about, but with 4 sockets
above where the cable connector would go (and an extra row of vias not
attached to the fingers).
Between PDP-8/Ls, a PDP-8/i, an RK11C, and a few odds and ends, I'm not
exactly hurting for M-series cards, but there are a few that I don't have
abundant spares of - I do at least have a pile of boards that have verified
bad chips (mostly 7474s and 7440s). Still, I wouldn't mind being able to
whip out a module for which I _don't_ have a sample of. I only have two
blank proto modules.
-ethan
--
Ethan Dicks, A-130-S Current South Pole Weather at 17-Jun-2004 03:20 Z
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Ethan.Dicks(a)amanda.spole.gov http://penguincentral.com/penguincentral.html