[rescue] New to me PDP-11/23+

Sun Oct 16 17:38:05 EDT 2022

If  you need more serial lines, IMHO the DLV11 is the 'standard' asynch
card. This is a sigma systems card as opposed to a genuine DEC module.
I've always used DEC serial boards - the sigma systems boards were known
good workalikes.
Sorry, I don't have an extra one to part with.
J

On Sun, Oct 16, 2022 at 3:26 PM Steve Hatle <steve.hatle at gmail.com> wrote:

> Would this be a good option to hang some more terminals off this guy? Or -
> if anyone here has another solution they would part with, I'd rather keep
> my money in the family...
>
> https://www.ebay.com/itm/185614924594
>
> Steve
>
> Steve Hatle <steve.hatle at gmail.com>
> October 12, 2022 at 9:59 AM
> I was coming to the same conclusion that this could/should be considered
> an 11/73, since the KDJ11-B always seems to referred to as the board in an
> 11/73. Totally likely that it was upgraded in the "original" 11/23+ chassis
> some time in the past.
>
> I will pull out one of the cards for the laser cutter and get pics up
> soon. Since I'll be in there, I'll take photos of the Zip interface card as
> well.
>
>
> Dave McGuire <mcguire at neurotica.com>
> October 11, 2022 at 10:56 PM
> On 10/11/22 13:35, John Hudak wrote:
>
> Thanks for the clarification Dave.B  About the bulkhead, I was not
> referring to the on-board connectors on the KDJ11-B. When the OP mentioned
> 'bulkhead' I thought he meant the circuit board that contains DB9, DB25,
> etc. which is usually bolted to the chassis.
>
>
>   Ah, gotcha.  In DEC parlance, that's the "cabinet kit".  What probably
> happened is that it was originally an 11/23, and was upgraded in-chassis to
> an 11/73, which uses a (slightly) different cabinet kit.
>
> The link I posted described the connections from the on-board SLU
> connector to the bulkhead connector.B  DEC had a number of bulkhead
> configurations on their machines.B  In any case, I re-read the OPs post and
> realized his system does not have the bulkhead connector, on the two 10-pin
> Berg/IDC connectors on board.
> To clarify things, the link I posted:
> https://gunkies.org/wiki/DEC_asynchronous_serial_line_pinout#10_pin_header
> <https://gunkies.org/wiki/DEC_asynchronous_serial_line_pinout#10_pin_header>
> <https://gunkies.org/wiki/DEC_asynchronous_serial_line_pinout#10_pin_header>
> describes the pinouts for the 10-pin Berg connector.
>
>
>   All understood.  That's also a good reference.
>
>             -Dave
>
> John Hudak <jjhudak at gmail.com>
> October 11, 2022 at 12:35 PM
> Thanks for the clarification Dave.  About the bulkhead, I was not
> referring to the on-board connectors on the KDJ11-B. When the OP mentioned
> 'bulkhead' I thought he meant the circuit board that contains DB9, DB25,
> etc. which is usually bolted to the chassis. The link I posted described
> the connections from the on-board SLU connector to the bulkhead connector.
> DEC had a number of bulkhead configurations on their machines.  In any
> case, I re-read the OPs post and realized his system does not have the
> bulkhead connector, on the two 10-pin Berg/IDC connectors on board.
> To clarify things, the link I posted:
> https://gunkies.org/wiki/DEC_asynchronous_serial_line_pinout#10_pin_header
> describes the pinouts for the 10-pin Berg connector.
>
> John
>
>
>
>
>
>
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> Dave McGuire <mcguire at neurotica.com>
> October 11, 2022 at 8:27 AM
>   Just expanding on a few points below.
>
> On 10/11/22 00:48, John Hudak wrote:
>
> A nice system - Congrats.B  This should keep you entertained for hours.
> The bulkheads for console SLU differed according to what the machine was
> (Qbus, Unibus) and they varied within the backplane family.
>
>
>   Steve said he has a KDJ11-B processor board.  This processor has two
> onboard SLUs which use the 10-pin connectors, not the 40-pins.
>
> I think you will need to know the disk type emulation the cpu is expecting
> to boot from.B  This info is contained in the boot proms and configured via
> the onboard jumpers.
>
>
>   There's virtually no chance of it being anything other than MSCP.
> Several companies made Qbus SCSI host adapters; all of them (or nearly so)
> implement MSCP.
>
> Not sure how to get the images onto the zip drive.
>
>
>   dd
>
> To run BSD 2.x requires separate I&D space and the usual upgrade was to
> exchange the 11/23 cpu board for a 11/73 board.
>
>
>   Not quite.  2.11BSD, the last release, is the first release to require
> split I/D space.  2.10BSD and prior will run on the 11/23.
>
>             -Dave
>
> John Hudak <jjhudak at gmail.com>
> October 10, 2022 at 11:48 PM
> A nice system - Congrats.  This should keep you entertained for hours.
> The bulkheads for console SLU differed according to what the machine was
> (Qbus, Unibus) and they varied within the backplane family.
> Without having my notes in front of me, the information on this wikipedia
> page is very helpful.  From what I can remember, this looks to be correct:
> https://gunkies.org/wiki/DEC_asynchronous_serial_line_pinout
> The pinouts on the various bulkheads show what pins on SLU connector/CPU
> board to connect to.
>
> Back in the day, I designed and built my own SLU interface/bulkheads for
> our lab machines. If I can find my notes, I'll update the info.
> If you haven't already, you should check out bitsavers for some very
> useful documentation on the KDJ11-B. Specifically the KDJ11-B CPU Module
> Users Guide EK-KDJ1B-UG-001
> and
> KDJ11-B CPU system Maintenance EK-247AA-MG-001
>
> Useful information on how to configure the jumpers on the board, and set
> the baud rate for the SLU.  The joys of ODT are well explained in the
> second manual.  The User Guide does a good overview but the System Maint
> manual has more detail
>
> You can configure the CPU board to use the onboard SLU as the console or
> another asynchronous serial card such as the DLV11-J. Not sure what config
> you have. The manual for the DLV11-J is also on bitsavers.
>
> Software - I can't help much here as my machines use RL02 and I have
> actual packs for RT11 and RSX11.  OS's can be loaded using SIMH in at least
> a couple of ways.  There is a TU-58 emulator via a serial line interface.
> As you mentioned, you need to get the SLU working to use it.  IIRC, there
> are RT and RSX-11M versions (documents and compressed images , RL01 format
> I think). I think you will need to know the disk type emulation the cpu is
> expecting to boot from.  This info is contained in the boot proms and
> configured via the onboard jumpers.
> Not sure how to get the images onto the zip drive.
> IIRC, the 11/23 could only run UNIX v5, V6.  To run BSD 2.x requires
> separate I&D space and the usual upgrade was to exchange the 11/23 cpu
> board for a 11/73 board.
> Good luck
> J
>
>
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>
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>
>
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