23 Mar
2005
23 Mar
'05
5:01 p.m.
Ethan Dicks wrote:
This version does use the EAE. I have another that is MUCH simpler that
does not seem to need EAE.
It seem like there is something wrong with the timing generator in the
EAE. Since NOTHING works when the EAE timing generator is needed, maybe
it is something simple. :-)
Lately what I need most is time...
On Wed, 09 Mar 2005 20:43:12 -0500, Charles H. Dickman
<chd_1 at nktelco.net> wrote:
It was nothing really... :-)
I added support to SPCWR3.PA for the VC8/I.
http://www.chd.dyndns.org/pdp8/VC8/SPCWR3_vc8i.PA
Nice! Thanks!
This requires
an EAE and now I find out that my untested EAE does not work.
Doh! I didn't even think of that. :-( I don't have a single EAE for
_any_ machine.
The closest I could think about getting would be to bum
some M-series
boards from a working machine/disk controller and stuff them in my -8/i,
but ISTR there are a few wire changes to make as well, so I think I'd
rather not do that if I thought I'd have to remove it. In any case, I don't
have a genuine VC8/I in the first place, or it might be attractive to try.
Ah, well... maybe _someday_ I'll run across the parts I need to pull this off.
From what I saw in the 8/I printset, you need 3 cards: two A607, and
one M701 or A701 (one place its and A and another place its an M). The
A607 might be generic, but the M701 is very specifically the VC8/I
display controller.
I got a copy of
MAINDEC-8E-D0LB-D which is EAE test 1 and it locked up
pretty much the same way. I removed the EAE and the diagnostic halted at
a reasonable place insteading of locking up.
Sounds ominous.
This not gonna
be easy to fix. The over-the-top connectors prevent the
use of an extender card, so I can't probe anything easily.
-ethan
-chuck