23 Jan
2019
23 Jan
'19
6:40 p.m.
iPhoned this in!
On Jan 23, 2019, at 8:43 PM, Paul Koning via cctalk <cctalk at classiccmp.org>
wrote:
On Jan 23, 2019, at 5:37 PM, Noel Chiappa via cctalk
<cctalk at classiccmp.org> wrote:
In response to a request a couple of years back from Cindy, I've been slowly
working on a page to help scrappers identify PDP-11's, and give them an idea
what to look for. I have it _mostly_ done:
http://ana-3.lcs.mit.edu/~jnc/tech/pdp11/PDP-11_Models.html
Comments/error-checking etc welcome. Also, I still need images of a few
things: -11/60 and -11/94 front consoles, the original LSI-11 card, the
KDJ11-E, and most of the DEC QBUS boxes. (Yeah, I could try looking for free
images, I've been busy!)
Any help gratefully received!
Noel
Google "pdp11/60" turns up some good pictures, one showing the console panel
closeup is from a UK computer museum.
The 11/44 picture is a bit strange looking because the innards show through the perforated
panel, which is probably not how it would be perceived by most observers when just looking
at one. The same goes for the 11/24. It seems like a problem caused by taking the photo
with flash; lit by ambient light it would probably look better.
PDP11/84 and I think 94 also can be found on the cover of some of the Handbooks in
Bitsavers.
A variant of the LSI-11 is the H-11 sold by Heathkit. Is that actually the same board?
Either way it would be worth mentioning
The heath h11 and the lsi11 are
The same right down to the handle. The prime difference
Is the heath backplane is smaller number of slots and user assembled along with the case
and power supply. The memory, io, and disk system
was all heath and could be used in dec backplanes and DEC cards in heath. The heath disk
was RX01 comparable and could format media.
Allison
Do you want to show the PRO system boards? And maybe the I/O boards? Those both are
quite different looking, especially the I/O boards with their odd connector and differing
number scheme. (PRO boards are marked with the ROM ID number, a 16-bit value shown in 6
octal digits.)
In the discussion of boards, you might mention that "FLIP CHIP" often appears
(on older boards? All boards? Many boards regardless of age?). And there will be a
"digital" logo, the 7-box kind. And the handles are either plastic or metal as
shown, but either way always have a module number on them. If it looks like one of those
cards but doesn't have a module number, or it's a large logic board with a white
handle, it's probably from some other company though it may well be a DEC-compatible
board.
The "Miscellaneous Digital Equipment Corporation PDP-11 Information" link lands
me on a "Forbidden" error page.
paul