Glen,
Thank you, I just ordered a set of the 1655X cables, the seller is about
3 miles from me. So no shipping involved. I also asked him about the
80 pin high density cable.
thank you for all of your help.
Now I need to get two 16577D boards, one 16534A board, one 16534A and
one 16522A. And then if I can get lucky a a 16505 to help me design a
debug board for my PDP-8/E computer from the 70's.
I also have a 16500C coming from ebay, I plan on putting all of the good
cards in that and then selling the 16500b with the LAN and Memory upgrade.
Thank you for all of your help,
Mike.
On 9/20/2026 12:20 AM, Glen Slick via cctalk wrote:
On Sat, Sep 19, 2026, 10:03 PM Mike Katz via cctalk <[email protected]>
wrote:
Glen,
I'm hoping to purchase two 16557Ds to upgrade the two 16550As that I
have. How do the 16557D's connect to each other or do they not need to
connect together?
The 16554/5/6/7 modules have a 20 conductor cable plugged between two
connectors on a single module configuration. On a multiple module
configuration one end of the cable is unplugged from one of the connectors
on each of the expander boards and plugged into a different connector on
the master board.
Also, an additional pair of cables is needed to connect between a pair of
connectors on each board of a multiple board set.
HP part number 16555-68701 or 16555-68705 is a set of pairs of cables for
different numbers of boards in the set. 16555 are limited to 3 board sets,
16556/7 up to 5 board sets.
For example item 263655364718 or 355859408593 on eBay.
