Trying to get running an LSI 11/23

[Tony Duell]

> 
> 
> I've been tinkering with this mutt LSI 11/23 system I've got and am trying
> to get it running.  It's a custom-built system that has a mix of DEC and
> third-party boards.  It's configured as follows--my apologies if I'm not
> conforming to standard DEC notation here [notes in brackets]:
> 
> Cage 1
> Slot 1: DEC M8186  |  CAMINTONN 504 [1]
> Slot 2: Dataram Diceon [2]
> Slot 3: Data Systems Design A4432-4  |  Grant Continuity [3]
> Slot 4: Emulex TU0110401 [4]
> 
> Cage 2
> Slot 1: Emulex Tu1110406 [5]
> Slot 2: Grant Continuity  |  Digital Pathways TCU-50DYR [6]
> Slot 3: MDB DLV-11J  |  DEC M9400 [7]
> Slot 4: Empty [8]
> 
> Notes:
> 
> 1. I believe the Camintonn card is memory
> 2. This has "RK:" written on the handle...an RK05 disk controller?

Probably a disk controller for something else that emulates an RK05 to 
the software. What connectors are on this board?


> 3. The Data Systems Design card has "DY:" written on the handle.

DY: is the normal device name for an RX02 8" floppy. Does this card have 
a 50 pin header on it? If so, you might have got one of the cards that 
does the RX02 format on normal (SA800-series) drives, which is just what you
want, I think.

> The system powers up.  There are +5V and +12V LEDs on the front of the
> panel that come on, and I've checked these lines at the power supply and
> they are good.  One oddity: the terminal marked -12V is a perfect -0.00 on
> my volt meter.  WTF?

Hmm... Without a -ve supply, the serial ports may well not work 
correctly. I would want to check this further (in particular, I'd want to 
check the supplies to the RS232 (or whatever) driver chips on the DLV11-J 
card.

-tony