No, it's an H/Z89 was: Re: Z-100 find ?

From: Dwight Elvey <elvey_at_hal.com>
Date: Mon May 10 16:13:02 1999

Christian Fandt <cfandt_at_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
Received on Mon May 10 1999 - 16:13:02 BST