The rarest computer I now have is a working MCS Intellec 4. I also have a GRiD Compass II 1137 (not as rare as the Intellec but there are not many of the 1137's out there).
Jeff Meyer
Hi
One of the things I've seen that is most of these machines seem
to lack lubrication. These things need lots of oil. If you've
no run it for a month or two, you'll most likely need to
quirt some oil in it. The other thing is if they are run
for some time, they need to be cleaned. This means partial
disassembly and dunking in solvent ( a large sonic cleaner system
is best but one of those automotive part cleaning trays with
the pump works well ). There are a lot of moving parts and they
all rub against something.
Anyway, for the original problem, check the coupling between
the printer unit and the keyboard. The "H" coupling piece
often pops off. This will cause the machine to not lockup
when in the local mode.
That board is most likely a RS232 interface card. Maybe some
pictures would be good.
Dwight
>From: "Brian Knittel" <brian(a)quarterbyte.com>
>
>Hi Y'all,
>
>I just popped open an ASR-33 I picked up a few weeks ago. The tty ran
>OK in local mode in the store where I found it but in shipment to me
>something happened, it now free runs (runs free?). Maybe it's a loose
>connector.
>
>In the electronics bay on the right hand side, there's a printed
>circuit board that runs from front to back. It's definitely a power
>supply, and probably also an RS-232 to current loop converter. In
>front is the line/off/local switch, and in back are several large
>Molex connectors. I was surprised to see this printed on the circuit
>board:
>
>MITS INC
>TELETYPE INTERFACE BOARD
>REVISION 0
>COPY RIGHT 1976
>
>Does anybody know if this the Altair MITS? The date seems about
>right.
>
>Was it common to produce custom internals like this for teletypes?
>
>Anybody have the schematics for this board?
>
>Thanks,
>Brian
>
>=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
>_| _| _| Brian Knittel
>_| _| _| Quarterbyte Systems, Inc.
>_| _| _| Tel: 1-510-559-7930
>_| _| _| Fax: 1-510-525-6889
>_| _| _| Email: brian(a)quarterbyte.com
>_| _| _| http://www.quarterbyte.com
>
>
Folks,
Had this mail in from a bloke who has a Signetics development to (I
assume) give away; reply to him direct as usual.
Cheers
w
> > Geoff Baxendale (thebears(a)sarno.freeserve.co.uk) on July
> > 29th, 2004 at 10:47PM (BST).
> >
> > Hi Adrian,
> >
> >
> >
> > I have a Signetics 2560 development system complte with 8"
> > floppies VDU and printer. Any interest? Enjoyed you site,
Hello
Today I found a infovox 500 speech syntizer card, its a small 8bit
isa card, dominated by a massiv 68hc000 dil, two 27c2001 eproms,
two 62256 32kb sram, and a 88c681 Uart along with a db25 rs232
serial port.
Does anyone knows such a card ?
My initial thought when I brought it was to remove the
parts as everything is socket, but now I`m not sure, might
be fun to use or even usefull to someone.
Regards Jacob Dahl Pind
--
CBM, Amiga,Vintage hardware collector
Email: rachael(a)rachael.dyndns.org
url: http://rachael.dyndns.org
Hi all,
A quick question for the VAXen experts out there. Help would very much be
appreciated.
I'd like to know what the maximum drive size is that I can attach to my VAX.
I've never been given a definitive answer, but many people appear to have had
success with drives larger than those 'officially' declared supported. I will
be running OpenVMS.
In particular, I'm wondering whether a Seagate ST39173N which is a 9.1GB 50
pin device will work. There are also several 4.3/4.5GB 50 pin models
available, as well as a huge number of 68 and 80 pin devices that could be
connected via adapters.
I bought a Fujitsu 9.1GB 80 pin SCA drive and attempted to connect this to the
VAX via an 80 - 50 pin converted but the drive was not recognised properly by
either the boot rom or OpenVMS.
Thanks for the help,
Mark.
--
Mark Wickens
Rhodium Consulting Ltd
>From: "William Donzelli" <aw288(a)osfn.org>
>
>> OK, I do have one that is going to be an unusual one
>> that is significant in its insignificance.
>
>This is not what I mean by significant. I am looking for machines that did
>something historically important. Or even maybe not so historically
>important. Provenance - it is important.
>
>So far the silence has been a bad sign...
>
Hi
Sure, I know what you mean. It is just hard
to pick such items out from the flow. Things
like the Altair 8800 or an original IBM PC
come to mind. But where does one draw the line
for things like laptops. It isn't just a matter
of being first, it is a matter of actually
starting a particular trend. Some of these items
may actually be rare while others may be common
as dirt. TRS-80's surely had a significant
effect. The various BBC computers in the UK had
influence there as well.
I'm sure there are a number of others to mention.
The hard part is to pick one point in the flow
of things and state that this was truly a turning
point and not just some advertising hype.
Influencing things and actually causing wide
spread use are different as well.
Of the rarer machines that I have, I'd have to
say that only my Poly88 started a trend. It was
the first of the "reset only" front panels where
there was no longer all the lights and switches,
for what was then called PC's.
Dwight
> With the severe lack of docs, I haven't even powered it on yet.
have you looked at www.bitsavers.org/pdf/ti/980 ?
The 960 was the process control computer. 980's are fairly conventional
16 bit minicomputers.
Hello, all:
I'm trying to get my "new" Micromint SB180 to work with the floppy drives
that came with it. I've been given two sets of disks, both of which were
made on a known-working system but which produce read errors on mine.
The drives pass the internal disgnostics that are in the SB180 ROM, but I
want to eliminate the drive from the problem by swapping another in. It
appears to use standard 5.25" 1/2-height PC drives except that the "old"
drive has a head-load solenoid while the new one doesn't.
The model number of the "old" drive is FD55F-03-U and the model number of
the "new" drive is FD55BV-36-U. There are differences in the jumper
designations between the models so I can't readily map the settings.
Can anyone help with this? Thanks.
Rich
Rich Cini
Collector of classic computers
Build Master for the Altair32 Emulation Project
Web site: http://highgate.comm.sfu.ca/~rcini/classiccmp/
/************************************************************/
