26 Feb
2014
26 Feb
'14
12:07 a.m.
Hi Rick,
Am 26.02.2014 02:02, schrieb Rick Bensene:
I'm hoping that someone here has some experience
with PDP 8/e with the
RK8E disk controller for RK05 disk drives.
Uh! Oh!
The RK8E does not pass the Diskless Controller test in
my system.
Ugly. RK8E is too funny...
One might thing that there is a problem with the RK8E,
but that is not
likely, as this RK8E was recently tested in another system and worked
fine, passing all of the diags.
That *is* likely.
Thanks in advance for any ideas as to what to do/try
next,
I once had very similar problems with a (good!) RK8E. I isolated several
"bad" ICs on the boards which behaved randomly wrong.
But: Nothing was bad.
Check your PSU's 5V!
My quite loaded lab8/e back then passed *all* tests with 5V actually
sitting at only 4.3V. All tests mean: All CPU maindecs, hours of memory
tests, all peripheral tests, TD8E tests etc. But *not* that awful
diskless RK8E test. And the RK05s did not work properly, of course.
So with a little luck you have only a virtual problem.
The diskless test is something that frightens me every time I start it...
Kind regards
Philipp