PDP 11/03

Johnny Billquist bqt at update.uu.se
Mon Nov 9 17:16:13 CST 2015

On 2015-11-10 00:05, Noel Chiappa wrote:
>      > From: Johnny Billquist
>      > I doubt the -YA makes any significant difference here.
>      > ...
>      > Note that a -YA normally means it's just a board with a newer revision.
>      > It do not normally means any change in functionality, except perhaps
>      > some improvement. But in general totally compatible.
> This might be the exception to that rule! Note the description "extra wires to
> bring out clock & 110/300 speed change"; if one could in fact change the baud
> rate _off the card_, there's probably some special magic in the interface (and
> thus the cable). I suggest consulting 11/780 manuals to see how it was used.

While you could be right, I still doubt the change is significant enough 
to be incompatible. There could be some enhancement, but I would be 
pretty sure I could swap the card with a non -YA without any issues.

But you're right - the only way to know for sure is to find the 


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

More information about the cctalk mailing list