> From: Josh Dersch
> There's a 20-pin header on the CPU upgrade board which connects to the
> front panel. ... the programmer's panel loses most of its functionality
> .. but the HALT/SS and BOOT switches are functional with the cable
> connected. ... With the 20-pin cable fro
On 7/1/2017 8:59 AM, Noel Chiappa via cctalk wrote:
> From: Jerry Weiss
> So it would appear the upgrade board makes provisions for both
> situations.
I'm not sure that the two situations that the upgrade board supports are in
fact different, from its point of view. (Assuming t
> On Jul 1, 2017, at 10:59 AM, Noel Chiappa via cctalk
> wrote:
>
>> From: Jerry Weiss
>
>> So it would appear the upgrade board makes provisions for both
>> situations.
>
> I'm not sure that the two situations that the upgrade board supports are in
> fact different, from its point of view. (
> From: Jerry Weiss
> So it would appear the upgrade board makes provisions for both
> situations.
I'm not sure that the two situations that the upgrade board supports are in
fact different, from its point of view. (Assuming that the two situations you
refer to are the two different c
> From: Noel Chiappa
> (One cable carries uclock, the other uPC data.)
Minor goof there; the low bits of the uPC are in one cable, along with the
"Manual Clock Enable" and "Manual Clock" signals; the other cable carries the
high bit/bits (depending on whether it's a KD11-E or KD11-EA) of
> On Jul 1, 2017, at 1:08 AM, Mattis Lind via cctalk
> wrote:
>
>> Right, that's what's confusing me. I can't work out what you could possibly
>> be cabling to, on the new CPU board!
>>
>> Those two connectors on the M7859 are used only with the 11/34, not the
>> 11/04
>> (the cable from the M
> Right, that's what's confusing me. I can't work out what you could possibly
> be cabling to, on the new CPU board!
>
> Those two connectors on the M7859 are used only with the 11/34, not the
> 11/04
> (the cable from the M7859 to the programmer's front panel must be there,
> with
> both); they ar
On 6/30/2017 7:30 AM, Noel Chiappa via cctalk wrote:
> From: Josh Dersch
>> Now I'm confused. There is no cable from the front panel to the CPU in
>> a standard 11/34? (There's one from the front panel to the backplane;
>> another from the front panel to the M9301; and anoth
> From: Josh Dersch
>> Now I'm confused. There is no cable from the front panel to the CPU in
>> a standard 11/34? (There's one from the front panel to the backplane;
>> another from the front panel to the M9301; and another from the
>> programmer's front panel [if present] to
> On Jun 28, 2017, at 2:35 PM, Josh Dersch via cctalk
> wrote:
>
> On Wed, Jun 28, 2017 at 11:02 AM, Noel Chiappa via cctalk <
> cctalk@classiccmp.org> wrote:
>
>>> From: Josh Dersch
>>
>>> I pulled the ... bootstrap boards from slot 3 ... The BOOT button
>>> causes the RUN light to momentari
On Wed, Jun 28, 2017 at 11:02 AM, Noel Chiappa via cctalk <
cctalk@classiccmp.org> wrote:
> > From: Josh Dersch
>
> > I pulled the ... bootstrap boards from slot 3 ... The BOOT button
> > causes the RUN light to momentarily flash, but that's about it.
>
> That's not too surprising. The
> From: Josh Dersch
> I pulled the ... bootstrap boards from slot 3 ... The BOOT button
> causes the RUN light to momentarily flash, but that's about it.
That's not too surprising. The way booting works with the M9301 boot card (not
sure if you know this already; if you do, apologies
And to reply to my own post, tonight I took a closer look at the boards and
noted that someone had written "3" and "4" on the CPU and memory board
handles in sharpie. I checked out the power and ground signals on the card
edges and they match up with a typical MUD slot. Based on this I felt it
sa
Hi all --
Snagged an interesting boardset off eBay last week; it was listed as a
PDP-11/34 CPU upgrade with no other details. The set consists of two
hex-height unibus boards -- the CPU board has a J-11 processor on it,
the memory board contains 4mb of memory, and there's an interconnect
cab
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