10 May
1999
10 May
'99
9:13 a.m.
Christian Fandt <cfandt(a)netsync.net> wrote:
Hi Larry,
Yes, I am, but as I indicated in the revised subject line above, your
machine is an H/Z-89. It predates any Z100's by several years. The words
"Albrektson Sound/Clock H-89" and the comments " > There is a video
card on
the bottom. The vertical mounted motherboard has pins for 5 daughter cards
and a Z-80 CPU." certainly proves that it's H89!
First thing is to see if the built-in video terminal works and go from
there. There is a simple cable running between the Terminal Logic Board and
the CPU Board which carries the RS-232 signal for communication. All my
H/Z89 docs are buried somewhare in this danged house as we've recently
moved. No time to sort and catagorize many things yet. It's gridlock almost
like the old house was :( Knowing our resident archivist, Tony Duell, I
bet he will have docs in his collection and could take it from here. If he
by chance doesn't have the docs at hand, either someone else here could
jump in or I could excavate this house and find them within several days or
less. Let us know. Good luck with your find!
Hi Larry
As Chris said, it is surely a H89. I built the one I have, way
back when. I should also have docs someplace. You might look to
see if it has soft sectored controller or hard. You can tell
because the controller board of the hard sectored had a
UART, as I recall, instead of one of the more standard FD-
controller chips, like the soft sectored board had.
The video part was actually a H19 terminal, hard wire to
the processor board. This means, you should be able to
run the video part as a serial terminal and the processor part
with another terminal. This will help you figure out
what is failing. Again, I or someone else will have to find
the pinout for the molex connector and baud rate of
the video part.
Dwight