DEC 11/23 FP option (FPF11/M8188) information request

From: Joe <>
Date: Wed Oct 8 15:50:17 2003

At 01:24 PM 10/8/03 -0500, you wrote:
>emanuel stiebler had uttereth on Wednesday 08 October 2003 01:04 pm:
>> Patrick Finnegan wrote:
>> > I've managed to pick up an FPF11/M8188 (PDP-11/23 Floating Point
>> > option) for my PDP-11/23, and I'm wondering if anyone here knows how
>> > to set up/ configure this thing. It's a standard-looking dual-height
>> > QBUS module, with a 2x20 pin header at the top of the card (with the
>> > QBUS fingers pointing downward. I've got a non-+ 11/23 CPU board
>> > that I'd like to get it to work with, currently stuck in a BA23
>> > cabinet.
>> I hope I understand you here, but if you're trying to use it on a non
>> 11/23 system you out of luck (OK, you can use it on a 11/24 too ...)
>> If you look carefully at this board, you see that the qbus finger are
>> only for the power supply of this board, there are no signals on it.
>> Everything else this board needs is coming from the 11/23 or 11/24 FPU
>> socket on the CPU module ...
>No, I was trying to indicate that the CPU was an 11/23 not an 11/23+. So,
>do I need some magic cable to go from a DIP socket on the CPU board to
>this card? If so, does anyone have a pinout for it?

   If you're referring to the large socket between the MMU and FP IC, then
it's a spare according to my DEC handbook.


>Purdue University ITAP/RCS
>Information Technology at Purdue
>Research Computing and Storage
Received on Wed Oct 08 2003 - 15:50:17 BST

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