Need pinouts for MDB Systems DLV11J serial line interface

[Martin Bishop]

>>
>> Vintage Computer Festival declared on Saturday 30 October 2004 07:02 pm:
>> > I've got a serial line interface in this LSI 11/23 system I've got
>> > here. It's made by MDB Systems and is model DLV11J.  I've got the
>> > manual for the DLV11 but it gives the digram for one big 40 pin Berg
>> > style connector, whereas the DLV11J has 4 10-pin Berg style
>> > connectors.
>> >
>> > Does anyone have the documentation for this?
>>
>> Normally, a DLV11-J also has the four 10pin connectors.  The cable that

>But a plain DLV11 is a single-line interface (like a DL11) and has a
>single 40 pin Berg header. I suspect that's the pinotu Sellam has.

>I would try to find the DLV11-J manual (the DEC one), which has 4 10 pin
>Berg headers. If you can't find it, I'll see what I can do.

At the risk of being wrong, but we did a fair bit of this once upon a time.

The pin out of DEC 10p RS232 console ports were common across DRV11J, KXT11
& KXJ11 boards.  The pin out of MDB JFEP-SLU RS232 ports were the same, we
used common test leads.  Very probably an MDB DRV11J uses the same pin out.

The cookery for a DEC DRV11J null modem lead, taken from the 1980
Microcomputer Interfaces handbook, follows:

pin	connection
1	uart clock in or out		N/C
2	signal ground			RS232 pin 5(D9)/7(D25)
3	Tx Data +				RS232 p2
4	Tx Data -				N/C
5	signal ground			N/C
6	Indexing pin - no key		N/C
7	Rx Data -				connect to p9 (ref signal for diffl rcvr)
8	Rx Data +				RS232	p3
9	signal ground			connect to p7
10	+12V, with F1 installed	N/C

NB link p7 to p9 and adjust 2/3 twists and connecter gender to taste.

HTH

Martin

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