4 Dec
2021
4 Dec
'21
3:57 p.m.
-----Original Message-----
From: cctalk <cctalk-bounces at classiccmp.org> On Behalf Of Jay Jaeger via
cctalk
Sent: 04 December 2021 23:21
To: cctalk at classiccmp.org
Subject: Re: PDP-11/70 Boards
On 12/1/2021 11:55 AM, Noel Chiappa via cctalk wrote:
Very useful to see as I ponder trying to get my 11/45 (with a KB11-D in
it) going again. I think next time I work on this beastie I will roll it out from my
main room where the lighting and access are just OK into my larger room
where my PC is kept temporarily, for easier access.
Going to want to buy a load tester and thoroughly check out the power
supplies first - which are unfortunately really heavy (and may not be
mounted quite properly, either), as it has been several years since I turned
the thing on.
What kind of load tester are you looking to buy? I have an 11/45 which I need to test the
power supplies on too.
From the
blog of someone who got a KB11-A working
It's Fritz Mueller's blog; at about the top of this page:
https://fritzm.github.io/category/pdp-116.html
he's just turned the machine on for the first time, and you can follow
as he chases, finds and fixes CPU problems. The KB11-C/D of the -11/70
is _very_ similar to the KB11-A he was dealing with (they are
_basically_ the same CPU, with a cache, and other stuff added on the
other side from the CPU, on the KB11-C/D), so there are probably some
good lessons to be learned.
JRJ