> Picked up the main unit w/o keyboard at Weird Stuff a couple of days ago
> so I'm looking for a keyboard, docs and sw (I know, fat chance).
By the early 90's the Wicat company I knew was selling flight simulators.
I don't think the flight simulators were running on Wicat hardware but don't really know.
Don't know if the Wicat of the 90's was the same as the Wicat of the 80's.
The cool flight simulators in the 80's were often using E&S stuff inside. And the
Brochure you point out looks like it may have been aiming at a similar market.
Tim.
> Doing more cleaning in the basement.? Getting ready to recycle LOTS of
> data books.? Before I do, I thought I'd check with the group first.
Wonder if the Computer History Museum would want or could use them. If so, they might pay for shipping:
http://www.computerhistory.org/getinvolved/
> From:?Al Kossow <aek at bitsavers.org>
> Picked up the main unit w/o keyboard at Weird Stuff a couple of days ago
> so I'm looking for a keyboard, docs and sw (I know, fat chance).
>
> Dumped the firmware and scanned the PCBs. Looks like one of the bipolar
> proms is dead on the CPU, and someone reversed the two connectors on
> bottom of the graphics boards.
>
> This was one of the systems I really wanted in the early 80's.
>
> http://bitsavers.org/pdf/wicat/
I had one about 25 years ago. I still have the set of eight
boot/install floppies. There were different versions of the WS-150
with different memory management and different disk controllers. The
diskette box that I haved says: "CMI 10 Rev 3 Controller, Mapped
System 150 MEDset" I have been saving these for a very long time
hoping that I could find a good home for them.
--
Michael Thompson
Hi folks,
today I got a HP-85a for my collection (got it from a workmate whose father
died recently). It's in good physical and optical condition, very little
signs of use. With the machine came 2 tape carts, one 16k mem-board, a spare
roll of thermal paper, the user manual and a BIG carrying-case for the
machine and the parts. After a quick check (psu) I turned the whole thing on
and - whoopee, it's behaving like as it was new :D
Sorry for the spam, but I wanted to share my happyness.
Regards,
Wolfgang
--
Wolfgang Eichberger - OE5EWL
Operating System Collector
Blog: 5ewl.blogspot.com
Homepage: www.eichberger.org
Congrats, Wolfgang! I love old HP gear, they were some of the best made stuff ever. I still have an HP-67 lying around somewhere. Looks like you got a great machine!
>>
>> On 20 Jul 2011 at 22:31, Tony Duell wrote:
>>
>> > Actually, in my experience, a crowbar circuit is often used on a PSU
>> > with electronic overcurrent protection, and said protectiuon should
>> > operate if the crowbar fires due to an overvotlage. However, there's a
>> > second line of overcurrent protection (e.g. a fuse) that will operate
>> > if the electronic protection doesn;t (e.g. becasue the PSU control
>> > circuitry is totally malfunctioning).
>>
>> I've got a couple of linear supplies that use just that design--an
>> SCR crowbar driven by a comparator following a LM723 regulator stage--
>> the 723 has overcurrent protection, so it all hangs together.
>>
>> (and there is a fuse on the primary of the transformer as well)
>
>The HP9800 machines that I lkeep on going on about, and some of their
>periphearlas are like that. They use 723s either as linear or switching
>regulator controllers and have crowbars on the outputs. They do use the
>current limiting circuitry of the 723, and if that doesn't help there's a
>mains fuse.
>
Thinking about it some more, I guess it makes sense to crowbar the output
that is rising and going to cause damage rather than to crowbar something
nearer the input and maybe end up having to wait longer for reservoir
capacitors to discharge before the output voltage drops, even if there may
be more damage in the power supply in some cases.
Regards,
Peter Coghlan.
