PDP 8/e memory boards

From: Ethan Dicks <ethan_dicks_at_yahoo.com>
Date: Fri Jul 28 17:24:12 2000

--- Lawrence LeMay <lemay_at_cs.umn.edu> wrote:
> Its a Dataram Corporation DR-118. 16K x 12. Its a 3 board stack, plugs into
> only one quad slot, but the thickness prevents use of a second quad slot
> in the 8/E omnibus.

Nice. Good luck on docs, though.

> ...16K using only 2 slots instead of 6, and not needing 8 of those 'top'
> connectors

Speaking of those top connectors (H7-something-something-something), does
anyone have a supply of those available? I'm about to start making them
myself - I have enough to interconnect my -8/e CPU but not any of the core.
I've been working with a PDP-8/a hex MOS board (16K and 32K), but I'm not
sure if the rev of the timing module I have generates the right signals to
work with hex memory (there's an issue with CPU boards with three digits
in the handle numbers vs. four; I have some of each from two CPUs)

I'd love to remove one odd variable from the mix before I start to
component-level debug my -8/e CPU boards. At least I have this late-1970s
HP logic analyzer... I can attempt to set up stuff so it looks like
the pretty pictures in the three-volume maintenance set.

I may just order a bunch of connectors from DigiKey and make some new
interconnects. A wad of work to be sure, but at least I'll never run
out again.


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Received on Fri Jul 28 2000 - 17:24:12 BST

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