[HECnet] pdp-11/83-84

[Johnny Billquist]

On 2012-07-05 08:22, Boyanich, Alastair wrote:

G'day $ALL.

Quick question. I've just snaffled an M8190-AE with what I think is the
21-21853-06 FPU as an upgrade for either the 11/70 or 11/23Plus at home.
I've seen reference to CIS microcode for these boards about the place
and am extremely keen to have a go at it with macro. I'm not "actually"
sure if it has it in the PROMS, but being handy with a EPROM programmer
hopefully I can find it. Does anyone have any reading material on how to
figure out if the CIS microcode is installed ?

This CIS option is not a PROM, even though it might sound like that. It's more like a co-processor.

If the CIS options is installed, you can easily see that, physically, by the large chips next to the CPU. If it's not there, you have some empty sockets...

	Johnny

-- 
Johnny Billquist                                   || "I'm on a bus
                                                                  ||   on a psychedelic trip
email: bqt at softjar.se                         ||   Reading murder books
pdp is alive!                                         ||   tryin' to stay hip" - B. Idol