An update on the Wang system I rescued from Certain Death.. I
found a good portion of the manuals today while on an un-related
mission to the warehouse. I was walking past 2-story-high pallet
racks full of boxes of paper files, and a Wang binder caught my
eye.. sure enough, what appears to be the operations documentation,
including much custom work by the sysop(s) was in an open box. I
now have it with the machine itself.
Anyone on (or off) the List who is interested in acquiring this
taken-out-of-service 7110 system... contact me via e-mail. It
seriously wants a loving home and some 220-1 ph to eat.
FREE FREE FREE
Cheers
John
Greetings!
I have a couple of Tandon 8" slimline drives (They're in the basement and
I'm not so no model number.) They clearly can't read one another's writing
consistently, so I'm interested in alignment data as well as the jumper
definitions. Would you have a manual which contains that information? I
need to know what the jumpers are and do, and what the factory default
settings are. I also need to know where the dif-amp outputs to be used for
alignment are located, (pin numbers) as well as the index sensor pin and
other signals used in adjusting these drives for radial head alignment,
index alignment, track zero calibration, etc. If you have it and could
email me that data, it would help greatly.
regards,
Dick
-----Original Message-----
From: Tony Duell <ard(a)p850ug1.demon.co.uk>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Friday, July 30, 1999 7:23 PM
Subject: Re: Cromemco 4FDC, How do you format a disk?
>> true and for the data I gave the 125kbits/sec rate is too low. As it's
>> minima was 250kbits/s is twice that! Part of the recording scheme is
that
>> there are rules for continous strings of 1s and 0s, they arent permitted
>> to exist for clocking and bandwidth reasons.
>
>I've seen plenty of controllers and data separators that put limits on the
>maximum number of consecutive pulses and gaps. That's why you need clock
>pulses in MFM recording, and why Apple had the 5-3 and 6-2 encoder tables.
>I have _never_ seen a drive (and I've read OEM and service manuals for all
>sorts of drives) that specify any restrictions on the user data using the
>standard encoding schemes
>
>At normal 5.25" data rates (125kbps (user bits) FM, 250kbps MFM) :
>
>Repeated MFM 0's looks like repeated MFM 1's looks like repeated FM 1's,
>and consists of pulses every 4 us.
>
>Repeated MFM 1010... looks like repeated FM 0's, and consists of pulses
>every 8us.
>
>Now, all drives support user sectors of 1024 bytes (8192 bits), MFM at
>least (and I don't think this is a real limit of the _drive_ either).
>That means you could have either of the above patterns for 8192 bits --
>the user bytes 'touch' each other with nothing between, and there's
>nothing to stop you having a sector of 0's, a sector of FF's or a sector
>of 55s if you want it. A disk drive that couldn't store said data would
>not be useful.
>
>I've got a Sony 3.5" drive on the bench at the moment. Now this drive
>rotates at 600rpm, so you would double the above data rates. Some of the
>tests involve recording pulses every 2us (corresponding to the first case
>above) and 4us (corresponding to the second case above) continuously for
>one revolution and then playing them back. The service manual for the Teac
>FD235 gives tests involving the recording and reproduction of 250kHz
>(pulse every 4us) and 125kHz (pulse every 8us) waveforms.
>
>So it would certainly appear that these 2 drives could correctly handle
>FM recording at half the user data rate of the standard MFM encoding. In
>other words that Teac (720K) drive would handle FM encoding at 125kbps.
>
>-tony
>
Hello, time for the yearly nostalgia.
I have quite a collection of NES stuff (carts and consoles) that I've
rescued from trash, garage sales, etc. that has been sitting in my
basement for a few years. Trying to run one of the games produces odd
output (i.e. lines down it display, not booting entirely) which I know is
due to dirty contacts. What's the best way to clean these? Alchohol on a
swab? Freon? (I have a friend that bought out a very large supply of it
just before it became illegal to sell (i.e.: 100+ bottles for his
reel-to-reel tape recorders)
Kevin
-------------------------------------------------------------------------------
"It's you isn't it? THE BASTARD OPERATOR FROM HELL!"
"In the flesh, on the phone and in your account..."
-- BOFH #3
On Thu, 29 Jul 1999 22:58:15 -0500 "Roger Goswick" <ccfsm(a)ipa.net>
writes:
>Say, while I'm wasting everyone's time, where might I obtain a boot
>disk for my HP 150? Would any version of Dos 2.1 work or do I need
>an HP version. And many thanks all. This really is a swell bunch of
>people you have here!!
It's special. The IBMBIO.COM has all of the hardware specific drivers
for the thing, and it's specially written for the 150's IO system,
namely HPIB. Somebody's *bound* to have a copy somewhere . . .
My local surplus dealer had Touchscreen II's. I imagine I can get one
pretty cheaply . . .
Jeff
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On Thu, 29 Jul 1999 21:51:04 Joe <rigdonj(a)intellistar.net> writes:
>Tony,
>
>At 11:16 PM 7/29/99 +0100, you wrote:
>>> , but
>>> >doesn't the HP150 have an IEEE-488 port (aka GPIB, HPIB) as
>>> >standard.
>>>
>>> Yes, it does but the 150 uses the port to connect to peripherals
>>> operating under MS-DOS. It has no commands that will let you send or
>>> recieve specific strings over the HP-IB.
>>
>>That's news to me (and I guess to HP). The HP150 Technical Reference
>>Manual has a section entitled 'HPIB Interfacing' which describes how to
>>use the HPIB port for non-disk devices.
>>
>
> THAT's news to me! I've never heard of using a 150 as a HP-IB
>controller and I have a large STACK of 150 documentation and none of
>it even hints that you can what you're talking about. Can you make a
>copy of that for me? S@#* and I've got a pile of 150s setting out in
the
>rain cause I had no use for them!
Now see, I figured that you knew this, Joe. I remember when I was
working for motorola, they tried to market an automated radio test
system that used an HP-150 as an instrument controller, attached
(via GPIB) to a service monitor, and a *BIG* interface box called a
'barn' that routed the audio, PTT, etc.
It didn't sell. The application software sucked.
<SNIP>
> In C? Is there a C that will run on the 150? Most of the software
>has to be tailored specificly for the 150 or else be VERY MS-DOS
>compatible with no short cuts. I've heard of BASIC, Assembler and Pascal
that
>will run on the 150 but I haven't heard of a C compiler that would.
I suspect any version of 'C' that is a straight command-line c-compiler
*ought* to work (using dos calls only, of course). Hmmm. Turbo C 1.0
comes to mind. The hard part will be getting the HP-150 implementation
of dos 2.x (or better, 3.x).
Dang it Joe, see what you've done? Now I have to buy an HP-150 to try
this out. S@#*. :^)
Jeff
___________________________________________________________________
Get the Internet just the way you want it.
Free software, free e-mail, and free Internet access for a month!
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All,
My apologies. Dayna's web site says "Farewell", and the intel site
to which it points gave it a good try but didn't answer the question. I
recently got a Dayna Etherprint-T Plus but not the power supply for it and
i have no idea what voltage or current it needs. I'm pretty sure the unit
is later than 1989 but if anybody has one and could check out the power
supply to see what it says and email me off-list, I'd appreciate it very
much. Thanks!
- Mark
--- Kevin McQuiggin <mcquiggi(a)sfu.ca> wrote:
> Hi Gang:
>
> I also have about ten extra RL02 packs, if anyone needs any. They even have
> possibly useful stuff on them, e.g. VMS 5.2, VAX diagnostics, RT-11.
Do you have any way of archiving the data off to 10Mb physical backup
files?
-ethan
===
Infinet has been sold. The domain is going away. Please
send all replies to
erd(a)iname.com
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<Allison, received your note and check yesterday. Thank you. That is what
<cracks are for, isn't it? :) Glad the board works well.
Yes, but, I only play a blonde on TV. ;)
It's interesting to see the board with out all the hacks I'd gotten with
the first one back in 77! It was quite a mess but, cheap as a result.
It was an interesting board.
Allison
Hi Gang:
I also have about ten extra RL02 packs, if anyone needs any. They even have
possibly useful stuff on them, e.g. VMS 5.2, VAX diagnostics, RT-11.
Kevin
---
Kevin McQuiggin VE7ZD
mcquiggi(a)sfu.ca
