From: Geoffrey G. Rochat <geoff(a)pkworks.com>
>If you want to lose one of those 11/2s, please get in touch!
Is that for me or Jerome?
If I have a spare I can arrage to give one away. I'd have to check
as Qbus stuff I like to keep spares of.
Allison
> Looking for information about a Compaq Deskpro 286. I have two of
> them. Would like to know some specs, how to get into the BIOS, etc.
When painted gray (any shade you choose), they make an excellent
anchor for the bass boat, although the bass (and EPA) may disagree...
;-)
-dq
Hi,
Does anyone have ANYTHING on this processor? Development tools,
documentations, datasheets, etc? It is the coprocessor on the Inmos IMSB420
Vector Processing TRAM.
Thanks,
Ram
From: Jerome Fine <jhfine(a)idirect.com>
>>Dave McGuire wrote:
>
>> There's nothing anyone here can say that would convince me that this
>> message is anything but a very enthusiastic and rather caustic TROLL.
>
>Jerome Fine replies:
>
>Thank you for the compliment - was it? What does TROLL stand for.
>If you are going to pay me a compliment, at least have the courtesy
>of explaining it. Thank you.
>
>Sincerely yours,
>
>Jerome Fine
Troll, funny little doll with a stupid grin and as a character in
strories
known for propensity to start or fan trouble into a really big fire.
Not a compliment. Usually reserved for those that hit a group
causing a flash fire and running.
On the other hand the posting was rather strong. There is nothing
wrong with an 11/2. True an 11/23 has more oomph and all but an
11/2 is configurable as a very nice small machine. Paying 100$
for one is questionable in my mind on because they were so
common (over 100,000 cpu boards made). I have a few.
Allison
Haha, ah yes... gotta love Virgil Rice.. I bought something from him once
and even though I picked it up from his house, he still wanted me to pay
like 30 bucks shipping.. He has lots of cool stuff that I'd love to buy, but
not at the kind of prices he wants for it.. It would be far less irritating
were he not only about 40 minutes from me... He has an HP 21MX that I've
drooled over but he wanted like 700 dollars for it... Hell, he wanted 200
bucks apiece just for empty HP racks... Sorry for the rant, but people who
would rather throw stuff out because they can't get what they think its
"worth" truly irritate me... I'm not asking people to give everything away,
just to be reasonable about negotiating...
Will J
_________________________________________________________________________
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Only a few UPS's use 12 volts. Many use 36 or 48 volts. Then you get into
the 3KVA units that have 96 volt bank of batteries. The real nice 10+KVA
boxes have 180 to 300V battery banks. Some day I will get a new battery
bank for my 10 KVA box for the office. In the meantime I make do with a few
1 to 3 KVA boxes.
Also some of the 12v UPS's will not start from just battery. They have to
"fail over to battery" I do have a 1KVA Triplite that is 12V and does start
>from just battery. So keep your eyes open for those.
Dan
-----Original Message-----
From: Chuck McManis <cmcmanis(a)mcmanis.com>
To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org>
Date: Tuesday, October 10, 2000 8:52 PM
Subject: Re: 48v dc power
>Why not buy a "dead" UPS that can over the wattage of your system and
>install a 12V in plug on the back. Most of these use a 12V DC input and
>provide acceptable power on the output. Its cheaper than simply buying a
>12V -> 120V inverter @600Watts or so.
>
>--Chuck
>
>
>"Shawn T. Rutledge" wrote:
>>
>> On Sat, Sep 16, 2000 at 05:25:23AM -0800, Mike Ford wrote:
>> > I have some 48-57 vdc input, otherwise PC normal output power supplies
for
>> > about $5 each. Ask now if anybody wants some, basically I "think" new
units
>>
>> What I could really use is a couple of 12V input supplies. I want to
>> put a PC in the car and also run a couple of servers from a battery/
>> solar panel system. I know they are available new for $120ish if memory
>> serves but they shouldn't have to cost so much.
>>
>> --
>> _______ Shawn T. Rutledge / KB7PWD
ecloud(a)bigfoot.com
>> (_ | |_) http://www.bigfoot.com/~ecloud
kb7pwd(a)kb7pwd.ampr.org
>> __) | |
\________________________________________________________________
>> Free long distance at http://www.bigredwire.com/me/RefTrack?id=USA063420
I found some memory specifically for my poor little Mac IIsi. Does memory
need to go into the system in matched pairs or can it go singly?
Sorry for the slight OT.
--
----------------------------- personal page: http://www.armory.com/~spectre/ --
Cameron Kaiser, Point Loma Nazarene University * ckaiser(a)stockholm.ptloma.edu
-- To err is human -- to forgive is not company policy. -----------------------
>Date: Tue, 10 Oct 2000 10:25:12 -0500
>From: "FBA" <fauradon(a)mn.mediaone.net>
>Subject: Re: Moving a Microvax II
>Speaking of ebay: here is a $700 commodore 64 with the reserve not met
>http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=454431985
>Francois
Pfffffft! <wipes monitor> Clearly someone who hasn't done any research.
As a CBM-related aside, having found one of the rare/ultra rare/not rare at
all/discuss P500s a while back I get a phone call from an ex-collector who's
found the stable-mate to mine in his loft, in identical condition, serial
numbers only 32 apart, another one appears on eBay and sells for ukp300 then
someone ELSE offers me ANOTHER P500 with a couple of chips missing, Highest
serial number seen so far: 1296.
I don't know whether to be pleased with mine or not!
BTW, big site update at www.binarydinosaurs.co.uk (or
www.fop.i12.com/museum-frame.htm if that doesn't work). Many new pictures,
all pong carts catalogued and some info added on some of the more uncommon
machines, eg Enterprise 64, P500, BBC Domesday etc. Come along and don't
forget to stand on the antistatic mat on the way in. :)
--
Adrian Graham MCSE/ASE/MCP
C CAT Limited
Gubbins: http://www.ccat.co.uk (work)
<http://www.snakebiteandblack.co.uk> (home)
<http://www.binarydinosaurs.co.uk> (80's computer collection)
"Missing you already" - Mark Radcliffe
ZDNet has actually published something interesting for a change. An
article on "Why the world needs reverse engineers." Here's the link.
http://www.zdnet.com/zdnn/stories/comment/0,5859,2636304,00.html
I read it through, and thought it was pretty decent. There's space for
talkbacks as well. Enjoy!
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Bruce Lane, Owner and head honcho, Blue Feather Technologies
http://www.bluefeathertech.com // E-mail: kyrrin(a)bluefeathertech.com
Amateur Radio: WD6EOS since Dec. '77 (Extra class as of June-2K)
"I'll get a life when someone demonstrates to me that it would be
superior to what I have now..." (Gym Z. Quirk, aka Taki Kogoma).
This sould just make the 10 year rule.... Ran across one over the
weekend at a local University auction. Anyone have pointers to Doc's on
these cool Hypercubes? Did a fair bit of surfing over the weekend and
didn't turn up much. Lots of parallel processor info but all too new.
Obvious questions---- what did it use for a console & storage? I know
it ran their version of UNIX [ZENIX?] As I'm not wired for 220 yet it
will probably sit but I would like to complete a static display at the
very least. [couldn't talk my wife into using it for a lamp table in the
living room...although it is pretty cool & "modern" looking]
Any info appreciated.
Thanks, Craig
On October 10, Jerome Fine wrote:
> > There's nothing anyone here can say that would convince me that this
> > message is anything but a very enthusiastic and rather caustic TROLL.
>
> Jerome Fine replies:
>
> Thank you for the compliment - was it? What does TROLL stand for.
> If you are going to pay me a compliment, at least have the courtesy
> of explaining it. Thank you.
Oh, it was intended neither as a compliment or as a derogatory remark.
A "troll" is an opinionated statement on a volatile subject intended
to start a flame war.
-Dave McGuire
Don't forget the main thing that UNIX needs...
Useful error messages!
_________________________________________________________________________
Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com.
Share information about yourself, create your own public profile at
http://profiles.msn.com.
Here in India, because of my previous association with MGM Studios, I
find myself cast (rather unwillingly on my part) as a bit of a celebrity,
and so I have been interviewed by several different reporters from various
media.
During an interview with a fellow from The Hindu, the largest paper in
India, we got into a discussion of my own personal recording studio and
collection of vintage electronic instruments. I had been asked to provide
photos, which I brought.
In the pack pf pictures, two or three of my computer collection were
intermingled, and the discussion turned for a few minutes to the
preservation of technology in general, and why anyone would want a house
full of PDP11s, etc. They took several of the photos to run with the
article; I gave them a brief description of the studio and it's equipment,
and... they ran the picture of am DEC stuff, over the caption for the
music gear, after we all agreed *not* to.
I'm *still* getting calls from tech-heads who can't figure out just what
model Moog Synth takes up 11 linear feet of 6' racks with a Kennedy 9100
stuck in the middle of it.
sigh.
This, more or less, has happened each and every time I have given a
press interview on a technical subject in the last 15 years.
This one just happens to be classiccmp-related...
Cheers
John
There's nothing anyone here can say that would convince me that this
message is anything but a very enthusiastic and rather caustic TROLL.
-Dave McGuire
On October 9, Jerome Fine wrote:
> Jerome Fine replies:
>
> First I must admit I am biased since I do not regard PDP-11 hardware
> as being very important as opposed to the software. On the other
> hand, I have attempted to keep available a reasonable REAL PDP-11
> system at considerable expense compared to that $ US 100 mentioned
> above.
>
> BUT, unless there is some specific reason as to why some of the specific
> hardware mentioned is extremely important, I would suggest that the
> requested price is in excess of the value by a factor of 100. Old
> LSI-11 or 11/02 systems are so inhibited as compared with even an
> 11/23 CPU, let alone a 11/73 system, that I can't see why anyone
> would want one - except maybe to fill out a full line of PDP-11
> systems. When an emulator on a PC can duplicate most, if not
> all of the functions, only a die-hard hardware fan (addict - yes I am
> a PDP-11 software addict) would want an 11/02 system. And at
> $ US 100, that is so overpriced compared to an 11/73 in a BA123
> box no less about 2 years ago at $ US 10, I can't begin to see why
> Tom thinks or feels that such a price is reasonable. If Tom really
> wants to see it go to a good home, he should be offering to help
> with the shipping as well.
>
> Anyone willing to suffer through the hardware problems of an old 11/02
> system needs to be encouraged. I actually have a couple of such old
> systems which I haven't used in 10 years, but have kept just in case
> someone might want then, but if and when they are ever available
> (which could be within a year or two since I must start cleaning up
> the basement), they will be for free. Anyone who has that in mind,
> contact me and I will keep you on a list. Note that they are in Toronto
> and local; pickup only. The last time I gave away an 11/34 backplane
> and power supply, it took over a year to get someone to pick it up
> and almost ended up in the dumptser.
>
> Sincerely yours,
>
> Jerome Fine
Picked this machine up today and it works fine even though i didnt get the ac
adaptor. thankfully it uses a 7.2v battery so I used my rc car battery to run
it. The only info i can find is that it's a 10mhz 8088 with a 1.44 floppy and
1 meg. it also has a ram drive or DOS in ROM <?>. does this thing have a hard
drive or graphic LCD? what about memory expansion?
DB Young ICQ: 29427634
hurry, hurry, step right up! see the computers you used as a kid!
http://www.nothingtodo.org
In a message dated 10/10/00 7:36:51 PM Eastern Daylight Time,
KenzieM(a)sympatico.ca writes:
>
> Does the the IIgs doesn't use 30 pin, does the MAC SE?
> before I open the case)
>
that model of the apple // does not use SIMMs although I did find a gs with a
memory expansion card that could take 4meg of 30pin simms...
DB Young ICQ: 29427634
hurry, hurry, step right up! see the computers you used as a kid!
http://www.nothingtodo.org
From: John Allain <John.Allain(a)donnelley.infousa.com>
>
>Dwight> I think Kilby's was for the IC, not CPU.
It was the basic idea of an IC.
>Anybody know the line of products from TI, the ID's,
>of the stuff coming from JK's first chip?
The most infamous is the 709 opamp.
Allison
(another mail sent to me @ pdp11.org that I'm not personally able to
save/salvage - perhaps someone else here can? --bill )
If interested in this system, please email Tom at
the e-mail address given below. He'd like to see his
PDP-11 system go to a good home.
He's asking $100 plus shipping for the lot.
- - -
My first home computer was a LSI-11: A Netcom box (card cage) with Diablo
emulations of RK05 drives. I ran RT-11 3, then version 4, and I may have
actually genned a v5 system for it. Still have it in storage, need to get
rid of it.
I don't know if the processor is an LSI 11 or 11/02. It's QBUS. I think I
have assorted serial and parallel cards installed. I made a 8" floppy
subsystem based on a heathkit card, built into the most incredibly ugly
plywood box. I have 3 working diablo drives and a 4th that has serious
electrical problems, but the heads are good.
The original bootstrap/terminator card used a charge pump/inverter chip to
provide negative 12v for the boot prom, but it never came up fast enough
and you always got dumped to the @ prompt at power-up. Type 173000g and off
you go - but that wasn't good enough for me. I hid a little transformer,
bridge, and capacitor behind the backplane, and maybe a 7912 regulator (can't
remember) and thereafter, it takes off from power-up without help.
It has a Digital Pathways TCU-50 clock card, but the batteries are
probably long dead, and you have to hard-code the year into the fortran
/ macro program that reads the hardware clock and sets the RT-11 time/date,
which meant a small edit and recompile every January. I have a compiler and
assembler. I've got an armload of RK05 packs for it.
This pup is a real dinosaur. Please help!
Thomas M. Peters
<Peters.Tom.M(a)MBCO.COM>
(414) 931-3887
--
Bill Bradford * KD5LQR
mrbill(a)mrbill.net
Austin, TX
I picked up a small Data General computer this weekend. Can anyone id it?
It's about 8" high x 8" deep x 2 foot long. It has a tape drive, one
floppy drive, one dummy floppy drive and a (removed) 5 1/4" hard drive. One
the back it says "Desktop Series". There are also labels that say "CPU
W/FIS" and "CPU 256K" on the back. Four of the sections are labled "E
8712-N", "E 6336", "E 6301" and "e 6270-2" on the back. One of the odd
things about it is that it's wired for 220 volt AC power and doesn't appear
to be configurable for 110 VAC. (It only requires 5 and 3.15 Amps.) It has
two power inputs on the back. I posted pictures at
"www.intellistar.net/~rigdonj/nova-dt/dg-back.jpg",
"www.intellistar.net/~rigdonj/nova-dt/dg-frnt.jpg",
"www.intellistar.net/~rigdonj/nova-dt/dg-c.jpg".
Joe
CC to Port-VAX and classiccmp...
If someone's got the jumper setting chart for the TQK70 tape drive
controller (M7559 if I'm not mistaken), would you be so kind as to post it
in ASCII form, FAX it to me, or perhaps scan it and turn it into a .PDF?
Thanks much!
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Bruce Lane, Owner and head honcho, Blue Feather Technologies
http://www.bluefeathertech.com // E-mail: kyrrin(a)bluefeathertech.com
Amateur Radio: WD6EOS since Dec. '77 (Extra class as of June-2K)
"I'll get a life when someone demonstrates to me that it would be
superior to what I have now..." (Gym Z. Quirk, aka Taki Kogoma).
I have a somewhat flaky GRiD 1530 with battery in unknown shape, AC
adaptor, charger and docking station. It seems to have some trouble on
power up but once it gets going it's fine. 8MB memory and 40MB HD
running MS-DOS (I think 4.01?) with a 386 processor. Someone care to
make an offer? Contact me off-list. Warning: it's insanely heavy so
prioirty will go to someone who can pick it up. I'm in San Bernardino, CA.
--
----------------------------- personal page: http://www.armory.com/~spectre/ --
Cameron Kaiser, Point Loma Nazarene University * ckaiser(a)stockholm.ptloma.edu
-- Dihydrogen monoxide -- it may be in your drink right now! www.dhmo.org -----
10 years old? Foo, that's new :-)
I have a 1975 Gottlieb Top Score I'm restoring. Looking to buy
a new (1984) Gottlieb Haunted House. And I have half a share
in a 1968 Bally Alligator.
All of those are considered fairly new pinballs :-)
Wouter
www.retro.co.za <-- some pictures, not much...
I have a hard to replace dsdd floppy disk that produced a
screeching noise while attempting to read it on a win98 box under
Dos using a Dos program. I quickly removed it and tried to read it
on another Dos box also with a HDFDD. No screech but only the
directory was readable, not the contents. I checked the original
FDD again using a scrap dsdd floppy and had no trouble with it.
Anyone have any thoughts as to what would have caused this ?
And whether the disk is salvageable ? I'm reluctant to run the disk
again on any box till I explore the options, lest I damage it further.
It was an old DRI PC-install master disk for GEM.
ciao larry
Reply to:
lgwalker(a)look.ca
It's a Desktop Generation, I can find out which model fairly easily.
Basically, it's from the early to mid 80's, and it contains both a
microEclipse processor and an i8086, it can run both AOS and CP/M-86
simultaneously. I may be able to get manuals and software for it too.
Will J
_________________________________________________________________________
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http://profiles.msn.com.
Profiteering at its worst IMO. I got mine for $45 so to see the price double
in less than a year is just plain greed.
> -----Original Message-----
> From: Vintage Computer Festival [mailto:vcf@siconic.com]
> Sent: 07 October 2000 20:21
> To: Classic Computers Mailing List
> Subject: An article on the ZX-81 kits still being sold in the US
>
>
>
> http://www.theregister.co.uk/content/2/13785.html
>
> These guys are a bunch of clowns. They used to be selling these for
> $29.95 until the eBay phenomenon hit. Then they jacked up
> the price to
> $99.95. I guess they must be selling these at that price because they
> haven't backed it down.
>
> Is an unassembled ZX-81 kit worth $99.95 to me? Hell no.
>
> Sellam International Man of
> Intrigue and Danger
> --------------------------------------------------------------
> -----------------
> Looking for a six in a pile of nines...
>
> VCF 4.0 is September 30-October 1
> San Jose Convention Center, San Jose, California
> See http://www.vintage.org for details!
>
*> * Can anyone point me at a web source of information for a
*> * Dec TS05 tape drive.
*>
*> It's a rebadged Cipher F880. I don't know of any web sources of
*...and a crippled Cipher F880 as well. :-( Does anyone here know why
*DEC changed it to not work at 3200BPI?
Not *all* F880's work at 3200 BPI; a good chunk of them have the "HI
DENS" button on the front panel, but it doesn't do anything. (Well, in
diagnostic mode it has some functionality, but otherwise it doesn't.)
3200 BPI was never particularly common anyway. And the TS05/F880, while
cheap, was *never* a performance star. Many of the minicomputers they were
hooked to were hard-pressed to keep them streaming at 1600BPI, much less
3200BPI. And once you drop out of streaming, there's a huge performance
loss.
Tim.
You can hear the segment about the VCF on the Weekend Edition show by
going here:
http://search.npr.org/cf/cmn/cmnpd01fm.cfm?PrgDate=10%2F8%2F2000&PrgID=10
Scroll down to "Vintage Computers".
Requires Real Player, unless there's a way to get the lame Windows player
to work with .RMM files. Now I have to go download another crappy
application just to listen to this.
Sellam International Man of Intrigue and Danger
-------------------------------------------------------------------------------
Looking for a six in a pile of nines...
VCF 4.0 is September 30-October 1
San Jose Convention Center, San Jose, California
See http://www.vintage.org for details!
* Can anyone point me at a web source of information for a
* Dec TS05 tape drive.
It's a rebadged Cipher F880. I don't know of any web sources of
information, but you might look in any minicomputer rag like
_Processor_ to search the dozens of places that repair Cipher
1/2" tape drives and see if one of them is geographically near to
you.
Tim.
> * Can anyone point me at a web source of information for a
> * Dec TS05 tape drive.
>
> It's a rebadged Cipher F880. I don't know of any web sources of
> information, but you might look in any minicomputer rag like
> _Processor_ to search the dozens of places that repair Cipher
> 1/2" tape drives and see if one of them is geographically near to
> you.
You can find the document:
Cipher F880 Magnetic Tape Transport
Volume 1
Operation and Maintenance
at this link:
http://www.retrobytes.org/docs/cipher/F880/
hth,
-doug q
More specifically, an 'ApplicationDEC 433MP.' This is a two-CPU 1990/91
vintage 486 system, EISA bus for expansion, and a somewhat weird
proprietary bus for the two CPU boards made by Corollary (bought out by
Intel some time ago).
The system's in clean shape, both electrically and cosmetically, and is
known to be runnable on at least NetBSD/i386 (if in single-CPU mode). Has
twin SCSI buses inside. Includes 16MB RAM (maxed out), a CD-ROM drive, and
a QIC cartridge tape drive that, if I recall, is a 525-MB capable. Accepts
standard SCSI hard drives, but you'll need to either find the goofy little
feet that DEC used for those keyholed trays, or invent something yourself.
First person to hand me $20.00 cash gets it. I'd prefer not to ship: This
one's big, bulky, and fairly hefty. Would also be willing to trade for
MicroVAX III (KA650) or higher CPU and memory board(s).
Thanks much.
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Bruce Lane, Owner and head honcho, Blue Feather Technologies
http://www.bluefeathertech.com // E-mail: kyrrin(a)bluefeathertech.com
Amateur Radio: WD6EOS since Dec. '77 (Extra class as of June-2K)
"I'll get a life when someone demonstrates to me that it would be
superior to what I have now..." (Gym Z. Quirk, aka Taki Kogoma).
Found while sorting through a box of old papers:
http://www.trailing-edge.com/www/pdp11rabbit72.gif
Can anyone identify which magazine/issue it was originally
published in? Since it references the introduction of the
Alpha, I'm guessing early-mid Lasnerian 1990's, and I seem to
recall that the "upgrade" mentioned is the PDP-11/93.
Tim.
Cleaning out the basement, so the following are available:
1. Two 10.5" high BA11 Unibus expansion boxes, with power supplies and
some sorts of backplanes. Very clean condition. Weight is 70 pounds or
so each.
2. A large floor-standing tape storage rack. Base is about 60 inches by
24 inches, stands about 36 inches high, has hangers for a few hundred
magtapes. Does *not* disassemble.
You can pickup either or both in the Bethesda/Rockville MD area (on the
edge of the I-495 beltway), first-come, first-served. Email for details/
scheduling. If you get here and I'm in a good mood, you'll probably be offered
lots of other stuff :-).
Tim. (shoppa(a)trailing-edge.com)
Your message reminded me of a common mod that was done on OSI machines to
avoid inadvertant resets caused by accidently hitting the "break" key. Many
people installed a capacitor across this keyswitch so that it had to be held
down for a couple of seconds to reset the machine. The screen would contain
random gibberish at power up and pushing the break key should give you the
"C/W/M" or "H/D/M" depending on the ROM pages selected for start up.
-----Original Message-----
From: Robert Stek <r.stek(a)snet.net>
To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org>
Date: Saturday, October 07, 2000 4:34 PM
Subject: New find - OSI Challenger 4P
>Wheeee! I got an OSI Challenger 4P today (does this complete my collection
>of early micros with walnut sides? I now have my Sol and NorthStar Horizon
>and Challenger.) Of course it would be even better if it worked or at
least
>I had some documentation. A shielded cable terminating in an RCA phono
plug
>exits the cabinet. The fan turns and apparently something is being output.
>I tried a mono composite monitor with no luck, but channel 11 (?) seems to
>give what could be a screen image with several inverse video blocks
>scattered down the left side (we have a STRONG channel 3 here, and 4 is
>garbage). Pressing "return" shows no change in the screen, nor does
>pressing a momentary-contact switch (home-brewed?) above the keyboard
>labeled "Break Enable."
>
>Since I never even saw one of these in the 70's, I could use some help.
>Does anyone have docs they would be willing to copy for a reasonable fee?
>Any other advice cheerfully accepted.
>
>Bob Stek
>Saver of Lost Sols
>
From: Richard Erlacher <richard(a)idcomm.com>
>Allison, what I have tried to put as clearly as I know how, is that the
>objective is to read THIS diskette. I'm not trying to replicate the
BIOS or
>its functions, beyond the simple task of getting the data from THIS
>diskette. While it's true, one might want to write diskettes of a
format
>compatible with a foreign system, that's not what I want to do.
>
>Let me explain:
Dont bother. I understand. I will even repeat it if you dont think so.
WHAT I'M SAYING is "THAT DISK" if you do successfully do this
will likely be the only one (or only ones like it) to work. THere are
formats that resist and defy your assumptions.
>diskettes, of which most are written on controllers I no longer have,
nor
>want. Many of the diskettes I retained were copies of materials
downloaded
>from various RCPM sites in the early '80's, from the BDS CUG, and other
>organizations whose work product was worthy of note, and a bunch of
other
been there done that and then some. I only retain masters, clearly
marked
copies and others.
Much of the non commercial stuff is on the WC CP/M CDrom and there
is my personal archive. AS I read disks I also convert them to a
standard
set of formats and over the years that has kept the accumulation of
massive
piles to a dull roar.
>controller-of-origin. While some are clearly marked as to their
content,
>the format remains a mystery. My Systems Group machine won't read them.
Likely because they are ISIS, DD CP/M written on Intel (using M^2FM).
Some of the soft sector controllers used USART in sync mode and have
really odd formats that the 177x can munge.
>Does that make my objective clear enough?
It was all the time. You haven't heard the why nots.
>I'm not trying to automate out of existence the "black-art" of creating
a
>floppy disk BIOS for CP/M, since there are already enough of them out
there,
>all different because nobody seems to have gone beyond just "getting it
to
>work, sorta ..."
If you dont understand the odd things of BIOS design you can't possibly
understand how some of the truly strange formats result.
>OTOH, I WOULD like to see an automatic procedure for generating the
>parameters for a hard disk of a given configuration, striking a
resonable
>balance between efficient use of capacity and directory space. I've
only
I've done it a lot and it's not innate that I apply a lot of experience
to
doing what must be a black art to some. it's not. most of what you
do will be highly biased by the controller, drive and CPU.
>others, but have concluded that it's possible to do that automatically
given
>the geometry of the drive. The only issue is integrating the deblocking
>code seamlesly so it can handle both floppy and fixed disks sharing the
same
>memory buffer. That introduces plent of opportunity for errors.
Ah now we are getting to something far more practical. deblocking can
easily be automated but your dealing with a BIOS and the automation
has to be incorperated at build time. IE: the BIOS has to be built to
permit adding MODULES that do functions with standardized interfaces
so adding a floppy or hard disk is easier. Of course somethings can be
handled easier if you have memory to burn. For example if you have
4k of ram you can copy as many sectors as will fit regardless of their
physical size and the code will figure out how to accomodate the
geometry by calculation. In the end you will be reproducing a PC bios
without plug and play and limited to SCSI and IDE drives (not so bad)
as they are the only ones that can be queried directly for geometry
or better yet addressed as blocks. Older non IDE controllers are
harder as their register or parameter passing schemes are a PITA.
Examples of controllers that are awkard and different from each
other in some or many ways.
Teltek S100, basically two addresses with a packet messaging
interface. requires a drive specific setup based on geometry and
other low level drive specific functions. It will also deblock for
you
if you pass logical sector info.
Compupro Disk 3A S100, DMA interface to ram, local z80 for
processing and has involved setup. requires a Buffer space
in ram of sector size minimum, system has to deblock.
WD1002-HDO (host interface) like the others requires drive
specific setup and does not deblock. Interface differs.
local sector buffer only
WD1002-wxa ISA-8 Not like WD1002-HDO but does have
setup requiremnts and also deblocking is not done.
has local sector buffer only.
SCSI --> host board is like the WD1002hdo save you now
have to deal with the SCSI layer.
SCSI --> SCSI drive (over 40-50mb) block addressed at
512byte sector level, supplies geometry on query, larger
drive have cache.
IDE (larger than 40-50mb class) caching or at least sector buffers,
respond to geometry query on most. Interface on later designs
have variable geometry and block mode addressing to simplify
matters. Likely the easiest and most consistant to interface.
Thats a can of worms and worrying the right deblock, alloc or
directory size are the most trivial of problems to work out.
Now if you want ot make interfacing them easy and faster build
the bios so that it KNOWS NOTHING about the disk save for
a generic idea of a 8mb hard disk.
dpblk1: DEFW 256 ; SPT pass a ALLOC size chunk
DEFB 5 ; BSH Values for 4k alloc
DEFB 31 ; BLM blkmask
DEFB 3 ; EXM extent msk
DEFW 2047 ; DSM disk size in blocks (4k) -1
(8mb)
DEFB 512 ; DRM allocated directory entries
(512 8k files =4mb)
DEFB 11110000b ; directory alloc
DEFB 00000000b ; byte 2
DEFW 00 ; check size (fixed disk)
DEFW 0 ; track offset (do
partitoning elsewhere)
chk1: DEFS 0
alv1: DEFS 256 ; 2048 bits are needed to
store alloc map for 8mb.
dirbuf1: DEFS 128
this will pass as Setsector a binary value of 0-256 and in set track a
binary value
that is also in the range of 0-255. If these two are concatenated the
result wil
be a 16bit value that is the relative sector for a 8mb disk. If it is
right shifted twice
the result will be a block address (512byte) and a index to the correct
128 byte
sector within the block. For a drive that can accept block (physical
sector)
addresses this will be all you need other than commands around it. To
partition
that likely large drive do some 24 or 32 bit math and add 65536(8mb
partition)
to it to find the start of the next partition. If the disk is only CHS
addressing take
that resulting 14bit block address and divide by # phys-sectors to get
the sector
wanted. Then divide the residue for the cylinder and head. For
partitioning just
add to the track number the required tracks to clear the 8mb space prior.
For deblocking anything works and the floppy deblocker is used. There is
no
reason to deblock the hard disk seperatly from the floppy save for one
thing,
by keeping it seperate you will not slow the apparent floppy access due
to
thrashing. This is a consideration of available space (ram) and if
banked
ram is avalable it's a good place for it.
DEBLOCKING IS caching at the physical sector level. so if you deblock
groups of sectors of a total size that equals the ALLOC size you will
get performance. the BDOS does directory access minimally at the alloc
level, a single read captures an alloc address so your committed access
is alloc/128 sectors. If the sectors happen to be sequential on the
media
so much the better(there is a hint there about interleave). All you
need
is space. If your doing that make SPT equal to ALLOC (32 for 4k) and
just read the block starting at the address passed as track and use
sector as the index as the index into the deblock buffer. Works
better for floppies if you buffer and deblock whole tracks.
Allison
http://www.theregister.co.uk/content/2/13785.html
These guys are a bunch of clowns. They used to be selling these for
$29.95 until the eBay phenomenon hit. Then they jacked up the price to
$99.95. I guess they must be selling these at that price because they
haven't backed it down.
Is an unassembled ZX-81 kit worth $99.95 to me? Hell no.
Sellam International Man of Intrigue and Danger
-------------------------------------------------------------------------------
Looking for a six in a pile of nines...
VCF 4.0 is September 30-October 1
San Jose Convention Center, San Jose, California
See http://www.vintage.org for details!
From: Eric Smith <eric(a)brouhaha.com>
>He's not proposing to figure out the parameters by looking at tables in
>the BDOS. As you correctly point out, that stuff is in the BIOS.
True the BIOS is the repository of the disk information but it's not all
as I've repeatedly said in the "tables". It can be deeply embedded
in the code.
>Richard's point is that on a bootable disk, some set of sectors contain
>the BDOS code, which has known contents (for any specific DRI CP/M
release).
>The point is that some of the disk parameters can be worked out by
matching
>what sectors on the media contain what pieces of the BDOS code.
Sorry but the BDOS is usually in reserved tracks where things like skew
(aka intereave) is not always there or even the same density.
The BDOS other than being a known block of code contains none
of the disk specific code or layout. Putting that in the bios is what
made cpm portable to different platforms.
>It may not tell you everything about the disk format, and it obviously
>only works on bootable diskettes, but I think it is a good start.
It's only a start. to me as an bystander to this it's a interesting
exercize but one fraught with exceptions and limiations for it to
work reliabily.
Allison
-----Original Message-----
>> he uses as example. It is a defective assumption.
>>
>I'm not convinced that the structure of the BIOS matters at all if one
uses
>the BDOS to fetch or point to whatever he's after. I do believe it's
fair
His utilities break on three of my systems as I do some things like
bank part of the bios and in one case part of the BIOS is resident
and executed by a seperate cpu.
>> >In those cases, among which one finds the CCS example, wherein a
simple,
>> >"dumb" BIOS is loaded into a 20-K CP/M requiring a 32K memory in
which
>> >to run, and subseqeuently used to run a "smarter" and more fully
>developed
>>
>> Not really.
>>
>What do you mean, Allison? I can assure you that it works fine as a
larger
I didn't mean you cant load a smarter bios. Only that in the case of the
CCS
if you want a nice system loading a smarter bios is a good thing to do.
>> Yes it is. I have floppies that use 1k (most SD though some are DD!),
>> many that use 2k and even some nut case using 4k(not me honest!).
>>
>Yes but that's easily recognizable if you check the directory entries
and
>disk parameters. Remember, I propose extracting this information from
the
>physical medium, not from some speculation.
Suit yourself. There are a few programs outthere that "image" the
disk and they didn't have it easy either.
>The stepper-driven Rodime 204E (1982) was about as fast as that Quantum
and
>had 640 cylinders instead of the Q540's 512. I used one for years and
am
I presume the rodime was larger than 31mb as well so more cylinders are
not
amazing. Was it an 8headed disk?
>be posted sometime soon, I hope) was 3 ms. It would do the job for
sure, in
>3 ms. I checked many of them. The Tandon equivalent and the Shugart
>equivalent both did the same. Others came later.
There is no dispute about that and I still have the spec sheat and all
for mine.
But to go from track 71 to track 0 still takes 213Ms, you can go faster
if
you ramp the step rate to 2.2mS and look for track 000.
>So, what did you do when you wanted to use 17 512-byte sectors (commonly
>used) and a 5-head drive, like the ones form Miniscribe that plagued us
now
>and again? Or, for that matter, the 6-head ST225, which was somewhat
later.
>How about 1K sectors? You could get 9 of them per track. People were
after
>capacity, even though they hadn't yet figured out how to waste it.
did that too sector(s) is a 16bit value though most bios will truncate it
on
assumption that it will be 256 or less. The only effect doing to the
miniscribe
( have two) was I had to divide out using non binary integer math rather
than
shifts, no biggie. it was much faster drive too.
>I'm not sure it helped much, but since the early ('506-class) HDD's
stepped
>at 3 ms regardless, and since the controllers didn't take advantage of
>momentum, I put the logical zero track of every partition in the
physical
>middle of the corresponding region of the drive. That made the
worst-case
>directory-seek half as long. Once drives capable of buffering step
commands
>became available that stunt wasn't necessary. Avoiding the use of
physical
>track zero was an important trick, however, since almost every drive
homed
>to that track on power-on, and if anything went wrong, it took a "rest"
>there. I had a lot less trouble with drives once I learned not to use
>physical track zero for anything that mattered at all.
Yep you can do that. You can take multi platter drive and designate
each platter or head as a drive. In some cases thats faster.
For a 5mb st506 partitions were sorta pointless as I was going for
something
bigger than the 1mb floppies I already had. A 2.5mb partition was not
considered or desired.
For the larger 31mb drives I went to 8mb partitions and let them fall on
cylinder
boundaries and left it at that. By then caching was in use and directory
caching
as well so where things were was not much of an issue.
>> Memorex 102 I gave away working, CTRL-C was a real wait and
>> a kick to watch the head creap back.
>>
>If it truly "crept" back, it was probably because it was being stepped
too
>fast and got lost, finally having to do a recal, which it did slowly.
No 512 tracks or so and a really slow step rate it crept. the controller
was doing step out, are we at 000, repeat. Morrow disk jocky and
controller with their code... very slow.
Allison
I hope I don't get flamed too much. I just posted most of my remaining S100
cards on eBay. Seller name is Innfosale.
Sorry for this but I need to maximize my income. Boards from Northstar,
Compupro, Vector Graphic, Alpha Micro and some oddities. Also some Quantum 8"
disk drives.
Paxton
Please reply to original sender.
Reply-To: badger(a)netwalk.com
---------- Forwarded message ----------
Date: Thu, 05 Oct 2000 14:46:41 -0400
From: Butch Clodfelter <badger(a)netwalk.com>
To: donate(a)vintage.org
Subject: Re:Find Home
I am looking for a new home for my old IBM PC XT. It was manufactured in
the early 80's with the 8088 processor. IT has two HD's (10MB & 20MB) and
two 360 Floppy Drives. I have the original manuals for it. The monitor has
a 12' VGA color. DOS 3.1 was the operating system, with WP4.2, MP80. My
copies of the licenses were damaged and so only have copies, not originals!
If I find a museum where they will be used I also have a Kaypro 4 with 2.2
CPM OS I will sell for $100.00. The Kaypro 4 has all the original manuals
and Disks. Original cost = $3645.00 in 1984.
If you know of who I can contact, or of a home for the IBM please let me know!
Thanks
Butch
Sellam International Man of Intrigue and Danger
-------------------------------------------------------------------------------
Looking for a six in a pile of nines...
VCF 4.0 is September 30-October 1
San Jose Convention Center, San Jose, California
See http://www.vintage.org for details!
From: Fred Cisin (XenoSoft) <cisin(a)xenosoft.com>
>I am NOT saying that it is impossible - it is definitely possible. But
I
>am saying that the task of automating it would be significant. I have
I have said the same thing repeatedly. it's a worthy project but, I've
explained there are many formats that are similar that the only way
to tell them apart is to know or trial and error. I even gave one set
that is common in my room here.
Myself, prove me wrong. I have no investment in that and would
love to use it if it's a practical and useful tool.
Also myself I'm investing time in a project that I consider more
valuable. Adding a true heirarchal directories without breaking
most reasonable apps.
Allison
From: Richard Erlacher <richard(a)idcomm.com>
>Allison suggests that the disk parameters are obscure and hard to
locate,
>but CORTESI's book on CP/M, among others, provides a bit of software
that
In short simple sentences. If you have not done this you will be
surprized.
Cortesi write with the assumption that all bioses have the structure and
form
he uses as example. It is a defective assumption.
>In those cases, among which one finds the CCS example, wherein a simple,
>"dumb" BIOS is loaded into a 20-K CP/M requiring a 32K memory in which
to
>run, and subseqeuently used to run a "smarter" and more fully developed
Not really.
>version of the BIOS together with the OS loaded into whatever memory it
>finds available thereby making a 64K(actually 61K) CP/M quite
attainable,
This is not news, nor significant.
>one would have to examine the autocommand that's loaded in the "dumb"
system
>in order to find the image that's going to contain the "real McCoy" with
the
>full-featured BIOS from which the parameters relating to the directory
and
>data areas of the diskette can be extracted.
Presuming there was an autocommand.
>This strategy is particularly important in those rare cases where one
has
>actually done what the CCS folks recommend and format the first two
tracks
>of an 8" diskette single-density and the remainder at double density.
>Likewise, the remainder of the diskette can be two-sided. The reason
THEIR
CCS while a decent box is far from being the be all, say all of the bios
world.
>What puzzles me is that, if this information is so readily available,
why
>hasn't the entire process been automated already? I know there are lots
of
Becasue it's is not so readially available. You assume it is and proceed
that
way but once you get off that CCS box the world changes greatly. Look at
the 5.25 formats, look close at the similar but not the same formats.
For
example I have 5 different 5.25 781kb formats that are not even similar.
One uses 1024byte sectors, another has sector 1 on side one and side two
ends with sector 18 (512byte!). There is one that numbers the cylinders
sero thourgh 79 on one side and 80 throgh 159 on the second. The fifth
is like the first save for the skew is appied at format and not in the
bios.
Funny thing the DPH and DPB is exactly the same for all of them
>should be done. There is always a bit of a guess as to whether 4K or 8K
>allocation blocks should be used when hooking up a hard disk. That's
not an
>issue with floppies, however.
Yes it is. I have floppies that use 1k (most SD though some are DD!),
many
that use 2k and even some nut case using 4k(not me honest!).
>> I have a fully documented CCS and it clasifies as the early basic CP/M
>> bios of low to average functionality. It's robust but closer to a
minimal
>> example.
>>
>True enough, but it's compatible with a front-panel and the software's
>written for an 8080 so you can use their FDC with an 8080 or 8085 as
well as
>a Z80. Moreover, it's rock-solid. The fact that it uses a nearly
>vanilla-flavored CP/M doesn't detract either. I've run into absolutely
no
>CP/M programs that won't run on it, while there are numerous utilities
that
>won't work properly on the more modern MPM-targeted boards I got from
>Systems Group.
Sorta. It doesn't support type ahead, circular iterrupt driven buffers
for
fast serial devices and relies on CPU PIO. It's low end. The only thing
it does do is double density and SSSD 8" interchange (sometimes).
>What you refer to as skew is what I call the interleave, while a sector
skew
No I'm using the DRI term out of their books. I know its interleave.
>is a difference in sector numbering from idex, used by some systems
(mostly
>early DEC actually, but some truly random-access systems as well) to
Actually DEC has a two level one for VT180, interleaved 512byte physical
sectors
and interleave inside the sectors. It's one of three formats that were
used for that
though that was least common.
>If it's not the stuff from DRI, it's not relevant, since it's not CP/M.
Your really looking to ignore progress, and even DRI supplied mods?
>I'll admit that's a weakness, but for now, I'm happy to deal with CP/M
only.
>AFAIK, DRI didn't issue any patches to v2.2. There were several
enhanced
If you insist.
>That's true, BUT, when you have a two-stage boot, you can examine the
second
>layer boot system, and, in fact, have to in order to avoid getting
tangled
>up in discrepancies between the boot tracks and the directory and data
area.
Ok but what systems usually use a two stage boot? Few and nearly none.
>> storage. You will have to figure out from that a lot of things that
are
>variable and can still end up as the same answer.
>>
>In fact, I don't believe they have to be "figured out" at all. After
all
>the diskette is in the drive. You just have to look at it.
See my example of the 781k disks. Two of them would defy simple
inspection.
>It does get much more messy when you try to squeeze speed out of the
system
>in ways the ultra-slow CPU doesn't let you appreciate, but when I said
>optimal, I meant for the technology of the time, which meant, at least
to
>me, getting the most hard disk space to fit into the parameters the
system
>would allow, without overly restricting either effective space
utilization
>or directory space. That seems to have been the key tradeoff of the
time
>... allocation block size versus number of directory entries. One other
Not really a big deal was made of it as few had real world expereince and
were trying to scare up a few more bytes of the drive they paid so dearly
for and then never filled more than 50%. The other half was hard disks
were new things to have to deal directly with so there was an aura of
mystery to setting values. The only thing that ever and still concerns
me
is the ALLOC vector as for a 8mb logical drive with 4k granularity there
will
be 256 bytes of ram for just for that, add 512 for a host buffer, 128 for
the
directory buffer local variables and you eaten 896 bytes for the first
drive
and about 256+ per drive and that is non recoverable space. That is the
only real problem. Add that to a featureless base driver and it's an
easy
2-3k of space for the bios more if it's a real bios.
>factor was swtiching heads rather than moving the head stack. The heads
>take at least 3 ms to move from track to track, plus 8 ms on the
average, to
>rotate half a rev, while switching heads took about 40-50 microseconds
on
More than that as the ST506 didn't do (nor did the controllers of the
time)
fast seeks. You had to wait for the ST225 for that. Stated average
access
time is 178mS for st506, St225 was a more resonable 73 and the Quantum
D540 took that to a mere 57. The D540 could look faster though with it's
8 heads as you didn't shuffle far and the voicecoil actuator was fairly
fast.
>the early Seagate ST506's. The trick, to me, was always finding a way
to
>computer head, cylinder and sector from the CP/M sector number you were
>given by the BDOS without having to swallow up half a KByte in lookup
>tables.
Floggin. One the drive was filled to about 30% and had been in use for a
while you were moving around a lot and there was little trickery that
helped
at the drive level.
I didn't kill space in lookup tables. It was simple to me. The 4 heads
and the 16 512 byte sectors per track were handled as SPT of 256 in
the DPB so the BDOS would hand back a logical sector on a track
with head number in there too. I treated the four sides as one logical
track. A few right and left shifts would give me a head (upper two bits)
physical sector (middle 4bits) and logical sector index into the physical
sector (lower two bits). The CYLINDER was passed as track by the BDOS.
Obviously it was quite compact.
If you build like DRI, Cortesi or Laird said you hit the wall every
16k as where ever you are your going back to the directory where
ever it happened to be and that took a long time.
The first drive I had(still have turns 20 next summer) was a 506. It was
slow, the controllers were slow and the only up side is some would
buffer a full sector for you saving CPU timing. I stopped using it
when I got my second hard disk a D540, in real life it was much
faster and introduced me to the problem of partitions. I moved up
as the drive was available and offered speed, even with 6mhz z80s
the ST506 was ponderously slow. It was only exceeded by an 8"
Memorex 102 I gave away working, CTRL-C was a real wait and
a kick to watch the head creap back.
Allison
>Hope to have the event here in the Twicities after the snow leaves ext
>spring (2001). Still looking for more volunteers to help with the work.
>Also talking with some companies about being cash sponsors for the event
>along with prizes to give away. That's about all I want to give out
>right now until I have things locked down, but more to come.
>John Keys
Another words you are planning it for June? I remember when I moved to
Duluth MN, I figured I was safe with Memorial weekend. Wrong it snowed
while we were unloading the truck.
Dan
Opportunity knocks! I broke my left (prosthetic) foot last weekend and the replacement didn't make it here today as scheduled, so I'm going to be on my gluteus maximus for much of the weekend. If I've offered to scan a document for you, please remind me, and promptly, because I'm going to be busy catching up on chores, etc, after my broken foot is replaced.
I'm looking for a widely accessible site on which to store these documents, but I think the 1 MB/page TIFF's are a mite big for that. Perhaps someone would like to recommend a site? Let's NOT fight about the format, though, all right?
Dick
Hehe - I've got another version of this on my wall behind me ATM and it has
these extra lines:
When you hear the word 'runoff' you don't think of water
Your first reaction to a supposed problem is not to reboot the system
You can complete a 10-hour EDT session without looking at the keypad but
stare at the telephone to dial a number
You don't think 'fubar' is obscene
To you, the phrase 'NT CLUSTER' is humorous
You kow that there's something fishy in the Pacific North-West AND IT SURE
AIN'T SALMON.
> -----Original Message-----
> From: healyzh(a)aracnet.com [mailto:healyzh@aracnet.com]
> Sent: 03 October 2000 21:36
> To: classiccmp(a)classiccmp.org
> Subject: You might be a VMS Bigot if.....
>
>
> I was trying to find the order number for the OpenVMS
> V7.2-1/Alpha update,
> and came across the following little tidbit. With all the
> VMS traffic here
> the last few days I thought a few people might enjoy this.
> I'm sure a lot
> of you have seen this before.
> > The lack of so-called "vulgar" language in one's vocabulary demonstrates
a
> > fundamental lack of maturity.
>
> I would say that depends very heavily upon one's definition of the word
> "mature". I can report, without regret, that I'm unlikely ever to be
> "mature" by that definition - and I was born in 1962.
>
> (I will admit the caveat that a fear of using "vulgar" language, in the
> *very rare* situations where it really is appropriate, is also not
> necessarily healthy.)
In both speech and writing, we're taught that we can use transitional
phrases to help the flow. "Alternatively,", "On the other hand,",
"As you might expect,", and so on....
Kind funny, Dad seemed to pick up that G-D this and M-F that were
transitional phrases, rather than adjectives. This would have been
understandable had he been a sailor, but he was an M.P. in the Army.
As a small consolation, I always preferred to think that he was
reaching for words when he was p-o'd instead of reaching for a
club or a gun.
Such language is referred to as "intemperate." But at what point
does a lack of temper leave off, and righteous indignation begin?
Now, without a doubt, when he was p-o'd at my brother and I, this
was intemperate, as we could *never* have been guilty of anything
that would lead him to "righteous indignation"...
;-)
-dq
Did these single board computers run some flavour of u**x? I was putting in
a big Alpha Cluster at a very large aluminium manufacturer from Canada's
local plant around 3 years ago and I'm sure they were using Ziatech kit to
run the monitoring probes on all the potlines....they'll be pleased to hear
they've gone bust!
> -----Original Message-----
> From: Marvin [mailto:marvin@rain.org]
> Sent: 06 October 2000 16:45
> To: classiccmp(a)classiccmp.org
> Subject: Ziatech
>
>
>
> Anyone familiar with Ziatech? I was just checking some back
> email and found
> a liquidation sale going on last May. They were located in
> San Luis Obispo,
> CA and IIRC made single board computers.
>