I'm doing a circuit diagram of a SA1100 Disc Controller built
with a Z80 CPU. On the controller, I have two blue devices
lables "Z80 CLK DRV" on the board, and HPI-1014-782 on the
device itself. the "-782" is the date of production most
likely. I have no idea about the pinout of those devices nor
do I know where to finde datasheets to make a component for
my CAD software.
Heare you'll find a picture of such devices I mean (different
board, but same devices)
Any hints of what this is, how the pinout is, and where I can
find a functional description of this device would be welcomed.
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I have happened upon a fairly nice-sized Data General Power Supply
board. It's about 8" square with 2 x 120-pin plug connector the length
of the board. It says "650W AC autoranging power supply, (C) 1996 Data
General 107003838_02/04" and has a very tiny printed label with a part
number and serial number. The part number I've made out as 665643739,
although the printing is so tiny it could be?885643739. My wife says
005043739. Google turns up nothing.
I actually have two. These are essentially NOS parts and seem unused/clean.
Here's a photo:?http://i.imgur.com/ZyYYq.jpg
Is there any interest in these? What are they?
Jonathan Katz, Indianapolis, IN.
I am looking for some help in the Chicago area. Very recently, an IBM
mainframe old-timer passed away. He has some old manuals and so forth
that the family would like to save, but they understandably are too
busy. Of note is a 16 mm film concerning the release of OS/360, which
was to go to CHM.
So, if there is someone out there that could pick these items up
(Woodridge, IL - a southwest suburb), I would appreciate it. Time may
be short. Please let me know offlist.
Date: Sun, 1 Jul 2012 21:42:31 +0100 (BST)
From: ard at p850ug1.demon.co.uk (Tony Duell)
To: cctalk at classiccmp.org
Subject: Re: Z80 CLK DRV
Message-ID: <m1SlQyb-000J4jC at p850ug1>
I cna't help wit hthe pinout, but I can guess the function.
IIRC the clock input of the S80 is not actually TTL compatible, it needs
to be pulled up to the 5V line.My guess is that thes are clock driver
cirucits for this signal, they take a TTL level singal in and give out
the genuine 5V signal for the Z80 clock input.
I used to do a lot of Z80 designs, most with classic Zilog Z80s, but
also some later
ones with Harris CMOS Z80 clones for battery-powered applications. I don't
recall a lot of difficulty with the clock generation, I used classic
Generally I started with a faster xtal oscillator and divided down with
like a 74HC161, so maybe that was all that was needed to get the right
Got a bit of a scare this week. I have most of my equipment stored and I received a call indicating
that the lock on one of my units was missing. The management put a "temporary" lock on the unit
until I could get down and survey what was going on (and put a new lock on it).
I went down this morning and there in front of the door to my unit was my lock that had been cut off
(I suspect with bolt cutters). Fortunately, there doesn't appear to be any mischief (other than having
to replace the lock). I suspect that someone was confused (and probably lost the key to their lock)
and opened my unit. When they saw what was in it they moved on. The reason that I suspect this
was that nothing was disturbed and there are several obvious items near the front that would've probably
gone missing if theft was the motivation.
I put a new high security lock in place of the old padlock and will probably replace my other padlocks
with high security locks to prevent this sort of thing in the future.
TTFN - Guy
Continuing to make progress on the 11/04. The H7441 supplies are still to
be tested. The 24000uf input capacitor is faulty on one and while waiting
on the replacement I also noticed one of the 1200uf capacitors in the
output CLC filter was leaking. Now waiting for parts to replace both CLC
filter capacitors (560uf and 1200uf) in each supply before I power them up.
Moved on to the H745. The two output capacitors test file but the big
31000uf electrolytic after the rectifier is faulty and needs replacement.
Any suggested on a replacement other than same spec... it seems a bit
highly spec'ed for what this module is doing.