Interesting Z89 I/O board
glenn.f...@gmail.com
p.s. in looking through my doc’s to answer Jeff’s question I came across a manual for the Z-89-11 which was a Multi-Function I/O card that contained an 8250 UART, 2661 Enhanced Programmable Communications Interface (EPCI), and 8255 parallel port.
I’m no Z89 expert but I was not aware that Heath made such a card!
I seem to have the complete document (albeit a photocopy) including schematic…
- Glenn
From: glenn.f...@gmail.com <glenn.f...@gmail.com>
Sent: Tuesday, January 18, 2022 9:00 AM
To: se...@googlegroups.com
Subject: RE: [sebhc] Hello - serial question
Not sure how reliable your test is. Would seem to depend on how your CP/M is configured?
Attached is a loopback test procedure from the service manual. Perhaps this will be useful? You’ll need to key in the code from the ROM monitor prompt.
- Glenn
From: se...@googlegroups.com <se...@googlegroups.com> On Behalf Of Jeff G
Sent: Monday, January 17, 2022 11:05 PM
To: SEBHC <se...@googlegroups.com>
Subject: [sebhc] Hello - serial question
Hey everyone - not sure how I found this group but I've had an H89 sitting on the shelf for some time that I've been meaning to play with. I was curious about the serial ports on it and after doing a little testing, determined that at least the DTE port wasn't working. I was following Herb's post here: https://retrotechnology.com/restore/h89_trans.html and figured that I may be able to at least see some activity on the serial line by doing something like:
pip pun:=a:\test.txt (I created a test file)
or even something like: pip pun:=con: (and type some letters in) would get some activity over the port, but I had nothing.
I opened the case and found that the DTE connector was connected to P603 and not P605, so I went to correct that, and unfortunately managed to re-install the card one pin off, which managed to un-install the 7912 regulator.
So while I fix the 7912; can anyone tell me if my PIP commands above would work, at least do something? I have a handful of disks but the one I'm booting on has corruption or the floppy drive isn't too happy. It boots and works but complains about bad sectors a lot.
Thanks!
Jeff
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Terry Gulczynski
One of the main additions in shifting from CP/M 2.2.03 to 2.2.04 was the
addition of Z89-11 drivers. The parallel port was programmed as a
standard Centronics port. It also came with a cable that converted the
25-pin D connector to a Centronics connector (36 pin?) on the printer
side of the cable.
I still have the one I bought in the early 80s. I'm thinking the cable
is still around here somewhere, too.
Terry
On 1/18/2022 9:07 AM, glenn.f...@gmail.com wrote:
> p.s. in looking through my doc’s to answer Jeff’s question I came across
> a manual for the Z-89-11 which was a Multi-Function I/O card that
> contained an 8250 UART, 2661 Enhanced Programmable Communications
> Interface (EPCI), and 8255 parallel port.
>
> I’m no Z89 expert but I was not aware that Heath made such a card!
>
> I seem to have the complete document (albeit a photocopy) including
> schematic…
>
>
> *From:* glenn.f...@gmail.com <glenn.f...@gmail.com>
> *Sent:* Tuesday, January 18, 2022 9:00 AM
> *To:* se...@googlegroups.com
> *Subject:* RE: [sebhc] Hello - serial question
> Not sure how reliable your test is. Would seem to depend on how your
> CP/M is configured?
>
> Attached is a loopback test procedure from the service manual. Perhaps
> this will be useful? You’ll need to key in the code from the ROM
> monitor prompt.
>
>
> *From:* se...@googlegroups.com <mailto:se...@googlegroups.com>
> <se...@googlegroups.com <mailto:se...@googlegroups.com>> *On Behalf Of
> *Jeff G
> *Sent:* Monday, January 17, 2022 11:05 PM
> *To:* SEBHC <se...@googlegroups.com <mailto:se...@googlegroups.com>>
> *Subject:* [sebhc] Hello - serial question
> https://groups.google.com/d/msgid/sebhc/29866ea2-7a6b-40b9-9b95-ebe7315d3b55n%40googlegroups.com
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Glenn Roberts
To view this discussion on the web visit https://groups.google.com/d/msgid/sebhc/0bec7dcc-7b3c-20d8-c9cc-05021737a95d%40cfl.rr.com.
norberto.collado koyado.com
Sent: Tuesday, January 18, 2022 7:27 AM
To: se...@googlegroups.com <se...@googlegroups.com>
Subject: RE: [sebhc] Interesting Z89 I/O board