New find: HP 1000 E series

From: Frank McConnell <>
Date: Fri Jun 16 09:50:25 2000

Carlos Murillo-Sanchez <> wrote:
> I guess that the first thing that I have to do now that I tested the
> power supply and verified that the machine (seems to) turn on,
> is to build a serial console cable for this. I have several cables
> that will fit the BACI boards, but the connectors at the other
> end have been cut off. Does anybody have the pin out for the
> finger pads in the front of the BACI boards?

OK, so this morning I have in front of me a couple different versions of
HP part number 12966-90001: HP 12966A Buffered Asynchronous Data
Communications Interface Installation, Service, and Reference Manual.

The datacomm card-edge connector is called P1 in this manual, and
it's described in terms of letter codes A-F, H, J-N, P, R-Z, AA, and BB;
and then numbers 1-24. I'm guessing that these correspond to sides of
the board/connector but I'm not sure which side is the letters and which
is the numbers. Some help I am, huh?

It looks like HP typically shipped one of several cables with the board,
depending on what option the board was ordered with. What's copied below
is the configuration of the "default" cable, p/n 12966-60004, and which
I think is appropriate for a DTE-flavored RS-232 device (like a terminal)
with no hardware flow control.

pin Signal name Device pin RS-232C ckt Source
  A Signal Ground (EIA) 7 AB Common
  B F
  C CA Inhibit
  D Transmit Data (EIA) 3 BA Intfc
  E Request to Send (EIA) CA
  F Data Terminal Ready (EIA) CD
  H Ext Freq
  J F/4
  K F/8
  L F/16
  M F/2
  N P/Ext
  R Ext Clock 16 Device
  S Received Data (EIA) 2 BB Device
  T Secondary Line Sig Det (EIA) SCF
  U (spare) (EIA)
  V Secondary Receive Data (EIA) SBB
  X Clear to Send (EIA) CB
  Y Data Set Ready (EIA) CC
  Z Ring Indicator (EIA) CE
 AA Receive Line Signal Detect (EIA) CF
 BB Signal Ground
  1 Signal Ground
  2 CCNT 7
  3 SXX (Secondary Chan) (EIA) SBA/SCA
  4 BSCF
  5 SIN
  6 Xmit Data In
  8 +5 volts
  9 TTY IN
 10 +12 volts 5,6 Intfc
 11 UCLK0
 12 CLKP2
 13 CLKP1
 14 CLKP0
 15 CLKP3
 16 Recd Data Out
 17 BSBB
 18 DIAG
 19 Spare
 20 Run Disable
 21 BSXX
 22 UCLK
 23 -12 volts
 24 Signal Ground

There's a rather complex set of cross-connects in the card-edge
connector's hood:
  (A, N, 1)
  (F, X, Y, AA)
  (J, K)
  (W, 5)
  (4, 21)
  (11, 22)

Other cables described in the manual:

12966-60008, for HP 264X terminal
12966-60006, for modem
12966-60007, for HP 2749B teleprinter
12966-60010, for HP 2621 terminal
12966-60011, for HP 7221 plotter
12966-60012, for HP 264X terminal to HP 7221A plotter (???)

The cables for modem, 2749B, and 7221 look like they are intended to
go to something like a DB25 connector. The cables for 264X and 2621
terminal look like they're intended to go to the datacomm connectors
on those devices (264X would be a different card-edge, 2621 would be
an Amphenol 50-pin connector that looks like the "Centronics" SCSI

The cables can be wired to provide for an external clock source
(-60008 does this) or to provide a fixed? baud rate for the interface.
If you see connections to pins 12-15 and/or N that is what is going on
here. The -60004, -60006, and -60007 cables are shipped configured
for program control (i.e. code running on the processor can set the
interface's baud rate). I'm going to be lazy for now and not key that
table in. Maybe later if you want it.

How's that for too much info?

-Frank McConnell
Received on Fri Jun 16 2000 - 09:50:25 BST

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