24 Oct
2016
24 Oct
'16
1:41 p.m.
On Oct 24, 2016, at 4:35 PM, Guy Sotomayor Jr <ggs
at shiresoft.com> wrote:
Sure. But we're trying to understand what is required in order to design
alternatives.
Where do you see the 25 ns spec? I didn't see it (admittedly in a quick scan).
paul
...
OK, I guess my last email didn?t make it. It appears to me that the rise time is set at
25ns.
You need to look at the PDP-11 UNIBUS Design Description document on Bitsavers.
Firstly,
in section 4-1, it specifies which chips to use and recommends not using a whole list of
other
chips. The only recommended chips are: 8640, 8641 and 8881.