On Jun 15, 2015, at 11:06 , Mattis Lind <mattislind
at gmail.com> wrote:
Well. I am probably working on to much simultaneously.
I am very guilty of that, too! :)
Then I compiled your fork of tu58em on github. And it
worked perfect. I
didn't need to use the special vax mode that you have implemented though.
Ma?be it is required only by 11/730?
You could probably use Don's original tu58em, then. The 730 appears to have one 20ms
timeout in a critical part of the drive initialization routine (which is entered
repeatedly in normal operation, not just at power-up), and stock tu58em has a delay in
that spot that is problematic. Maybe the 750 console code either lacks the timeout check
or has a longer timeout period?
The bad thing with the 11/750 is that is has so many
socketed TTL gate
array chips. Sockets are bad. And gate arrays are bad. In that sense I
think the 11/730 is better since it is AFAIK based on mostly standard off
the shelf chips.
Mostly, if I'm not mistaken (I haven't gotten too deeply involved with the PCBs
yet). There are a number of PROMs.
Mark J. Blair, NF6X <nf6x at nf6x.net>