> Oops. I reckon I meant 360/60. Sorry.
> From: Gene Ehrich <gehrich(a)tampabay.rr.com>
> Date: 2003/08/29 Fri PM 07:51:51 EDT
> To: cctalk(a)classiccmp.org
> Subject: Re: IBM 60
>
> At 07:40 PM 8/29/2003 -0400, you wrote:
> >Ahoy,
> >I need an IBM 60. Has anybody got one of these big bears?
>
> What is an IBM 60?
>
> I worked for them for 27 years and as a consultant for another 10 and never
> heard of an IBM 60
>
>
>
> =================================
> Gene Ehrich
> gehrich(a)tampabay.rr.com
I no longer have the time or interest to play with my "University
Computing Company" 4K PDP-8/L. It's a box and front panel but no
cabinet - can't tell if it was a rackmount or tabletop. After
replacing almost all the 7440's and a few other IC's, it seems to
be fully working and "talks" with my ASR33 (desktop, no stand).
Many panel bulbs were bad so I have replaced them with
LEDs/resistors - glows red instead of orange/white but doesn't
burn out!
The only problem is intermittent read errors from the tape reader
that prevent me from reading in a long tape like FOCAL or PAL. RIM
can be toggled in and it reads BIN successfully.
I also have a homemade NVRAM DF32/DS32 128K emulator (you may have
seen the posts this winter) which also appears to be working but
may need some modification to work with DEC software. It stores
and reads blocks of data, anyhow, and is a 99% complete emulation
of the huge rackmount DF32 + 3 DS32 assembly. The interface is the
standard five-cable posibus and I had my own "paddle" connector
boards fabricated to use with standard 40 pin ribbon cables. I
will include the (Eagle format) schematic and board files and
hopefully someone can complete the project.
Emailed pictures available. I'd like to sell the whole works (8/L,
TTY and disk project) to a good home ;) otherwise it goes on E
bay.
-Charles
O.K. over the weekend I will inventory what is at home, which is where
the older stuff is. I know at work is the dilog controllers and the
9 track drives, cipher 880 and 990 are the newest. here at home are
the manuals the tc01 and tc02 emulex controllers and the older drives.
bug me if I forget!
Joe Heck
As heard from previous messages the TU10 would be capable of reading 7 & 9
track tapes.
--
A TU10 transport WITH A 7 TRACK HEAD can read a 7 track tape.
Good luck finding one.
For a PDP11, the interface was a TM11. There were master and slave
TU10 transports. The parity and lrcc circuitry only exists in the
first (master) transport. The interface between the drives is DEC's
old 'negative' logic.
At 07:40 PM 8/29/2003 -0400, you wrote:
>Ahoy,
>I need an IBM 60. Has anybody got one of these big bears?
What is an IBM 60?
I worked for them for 27 years and as a consultant for another 10 and never
heard of an IBM 60
=================================
Gene Ehrich
gehrich(a)tampabay.rr.com
I have dredged up my Atrona system and will try
to make some floppy copies for interested parties
soon.
I belive I have floppies to boot both the 8 bit
processor, and the 16 bit service processor into
MS/Dos 2.x (2.1 maybe).
I'll post again when I get the system tested and
running.
It uses standard 3 1/2" floppies (I think 720K,
again I'll have to post when I check it out).
Jim
> realized what was going on. So now I need a new printball and some advice on
> what to do about the missing rubber? hammer cover.
If the damage isn't too bad you can carefully file/sand down the damaged
areas so they are the same height and it will print better. The one
on the following picture had that problem and is readable but not great.
With a little more work probably could be a little better by reshaping/
flattening individual letters but decided to stop at good enough.
Print sample
http://www.pdp8.net/asr33/dms.jpg
This is my repair with a stick on foot.
http://www.pdp8.net/asr33/pics/ph_top.shtml?small
David Gesswein
http://www.pdp8.net/ -- Run an old computer with blinkenlights
>From: "John Honniball" <coredump(a)gifford.co.uk>
>
>Peter Turnbull wrote:
>> It's over 10 years old, and it's microprocessor-compatible, but it's an
>> analogue to digital converter chip, not a computer. It's also not in
>> my spares box, and I need one. Does anyone have a spare? Or a data
>> sheet?
>
>I only have a couple of ZN428 chips, and the data sheet for them. I may
>have data for the ZN448 -- I'll have a look. It was a Ferranti part,
>if that helps at all.
>
Many ADC had a large number of replacements. The trick is finding
them. There was no uniform part numbering for these, like was done
in the TTL world.
Dwight
