I have a like new, great condition DEC PC 100+ (Rainbow?) with Seagate
St412 10mb hard disk and dual floppy. One problem...NO monitor, NO
keyboard. I'm sure these can be located though. The power supply case
indicates a manufacture date of December 14, 1983. The unit looks as
though it just came out of the box, other than the little DEC plate in
the upper left corner of the front missing. The other one that says
"100+" is intact though. I have no idea why this is missing.
Make me an offer. Cash or trade or a combination. I'm always looking for
PC components such as internal/external cdroms, sound cards, SIMMs (30
or 72 pin, parity if possible). Best offer gets this one.
Email me directly.
--------------------------------------------------------------------
Russ Blakeman
RB Custom Services / Rt. 1 Box 62E / Harned, KY USA 40144
Phone: (502) 756-1749 / Data/Fax:(502) 756-6991
Email: rhblake(a)bbtel.com or rhblake(a)bigfoot.com
Website: http://members.tripod.com/~RHBLAKE/
* Parts/Service/Upgrades and more for MOST Computers*
--------------------------------------------------------------------
From: Joe <rigdonj(a)intellistar.net>
Subject: RE: Vacation Finds...
>I just bought CMB 8032 complete with a 4040 drive and CMB (rebadged Diablo
>630) printer and a Novation CAT accoustic MODEM.
Modems for the PET are probably the hardest thing to find (I am still
looking) as they had IEEE-488 interfaces.
> I got all the original
>disks and manuals and everything else with it including the warranty
>papers. I got Commodore BASIC, SuperSpell, Word Pro 5 Plus
Wordpro was IT for PET word processors those of you familiar with
Easyscript for the 64 or Plus Script for the Plus/4 would recognize the
simliarity.
> something called Jinsam and a bunch of other stuff that I haven't figured out
> yet. Believe it or not, I bought this from a NASA auction last week.
> Joe
Jinsam is a database management program, and I remember the ads
extolling it's use by NASA, so I don't doubt it. I read about another
NASA application for PETs in an early Micro magazine (sometime in 1980)
something to do with launch countdown of un-manned missiles. As I have
said before, it my not have been a graphics superstar but it had the
interfacing (IEEE-488 and parallel user port) for just about anything
scientific.
Larry Anderson
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From: Ethan Dicks <erd(a)infinet.com>
Subject: Re: Vacation Finds...
>>
>> Have been on vacation since Friday and still have a couple days to
>> go... From the thrift store outlook in the area things are improving
>> again (I guess people are starting their pre-spring cleaning)
>>
>> What I passed up on...
>> PET 8032, 4040 dual drive.
>Agggggh! I'd *love* to replace my long-lost 8032. [snip!]
>Anyway, rambling aside, where are you on vacation and is the PET still there?
>-ethan
That was in Modesto, CA, (My vacation this time is closer to home). I
think the proboability of those units being there are good (since most
of the local 'thrifters' snag the IBM, Mac, and Amiga machines that show
up). I would have gotten them myself but those PETs take up alot of
shelf-space (which is limited for me cause I have several PETs already),
and I was pretending to be strong (of course if it were an original PET,
an 8x50 dual drive or a B-128 it would have been bought. :) That chain
of thrift stores (they call themselves Thrift Center Thrift Stores) are
interesting, on Wednesdays and Saturdays they have 1/2 price days and
with their sometimes low prices you can pick up some really inexpensive
hardware, they also strangely have been a good source for Atari 800s.
Yesterday on our travels, we took off to Sacramento (California's
state capitol) and discovered in our wanderings SEVERAL THRIFT STORES
(Many within a square mile on just one street.) But given the time we
didn't stop, *sigh*, but we now know where to look next time. We did
stop at a warehouse sized used book store (on Power Inn Road) most of
the stuff is discontinued school texts, some assorted stuff... Not much
computer book pickings there unless you have an IBM, Apple II, or a Mac
(finding quality older computer books almost the most challenging task
only after finding software.)
Been wandering the valley for most of this last week and plan to rest
out at least today and possibly tomorrow before work on Monday.
Larry Anderson
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Visit our web page at: http://www.goldrush.com/~foxnhare/
Call our Commodore 64 BBS (Silicon Realms 300-2400 baud) at: (209)
754-1363
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To Greg Troutman:
I received the Laser 50 in the mail today... just as promised!! Thanks a
ton, and I hope you received my end the bargain as well?
To the list, I posted this here just as an example that there are
successful trades that take place because of the correspondance on the
list. Greg got in touch with me because I posted information about some
Apple cards that I had. We talked a bit, and decided this would be a
fair trade, neither of us had worries that the other wouldn't come
through on their side of the deal. It turns out we both sent our
hardware out the next morning, and 2 days later I received mine! Boy
Greg, I hope you got your ok... let me know.
Anyway, that's all. Just some publicity that trades can go right, after
having some bad experiences in the past, this re-opened my eyes to the
possibility of doing more often.
Thanks,
CORD COSLOR
--
___________________________________________________
| Cord G. Coslor : archive(a)navix.net |\
| Deanna S. Wynn : deannasue(a)navix.net | |
|---------------------------------------------------| |
| http://www.geocities.com/SiliconValley/Vista/4395 | |
|---------------------------------------------------| |
| PO Box 308 - Peru, NE - 68421 - (402) 872- 3272 | |
|___________________________________________________| |
\____________________________________________________\|
>Propose a slightly labor intensive but very practiceable method.
>
>Once the machine is operational step through the eporms using the front
>pannel and write down the data on a sheet of paper...it's only 1024 bytes.
>it can be then typed into another machine and stored, disassembled or
>whatever. Hand disassembly of 1024 bytes it's not that bad, I've done
>it in the past.
Just received by email from the original owner...
"When I got the DL8a there were only the 4 EPROMs. Not sure what's in them
though, I found the what I assume was the code in the EPROMs when stepping
through memory, but I couldn't be bothered trying to disassemble it. "
I guess this implies that it was probably working, and that it would be safe
to power-up and step through the memory myself. Any agreement here, or is
this a bad idea?
Cheers
A
Well the bottom line is... I'm not an electronics guy.
The option I will be following is getting the 1702A EPROMS copied and
a) backed up to several media formats
b) duplicated to new 1702As.
>I supose the solution is for him to build a 1702 reader (which is a lot
>simpler than the programmer!) and to read the EPROMs himself.
>The ultimate solution would be for somebody to program a 'spare' 1702
>with a known byte sequence, and use that to test the homebrew reader. A
>lot of work, though.
No, this isn't a solution. I'm a software guy - I'll re-engineer the 8080A
code if and when necessary, but there's no way I'm going to build hardware
for this thing. I just want to copy some EPROMS... not delve into clever
engineering to make them redundant! By the way, I have found several 8080A
disasemblers for MSDOS. THere are quite a few websites around carrying such
goodies.
> Or the one that's
>X-rayed with a sufficient dose to damage the chips, or the one that's
>lost, or whatever.
Is the X-Raying a valid problem? Will X-Rays further damage already fragile
EPROMS? As I said, I may have found myself four 1702A EPROMS, the only
problem here is getting the code from A to B. Maybe the ideal solution
would be for me to borrow a 1702 reader and do the job over here. That way,
the irreplacible EPROMs don't travel at all.
Cheers
A
OK, I've kind of settled on an approact to restoring the DL8A. I figure I'm
completely unqualified to do any of this and so will rely upon advice and
help from those of you who are.
I think the first and most important step is to back-up the extant 1702 boot
program. I've been thinking about this one (re: bit rot); would it be
possible to get a disassembly of the code to see if it looks OK? It can't
be too big - only 4 eproms total. Does bit rot proceed on a bit-by-bit
basis, or are whole segments knocked out at a go (ie: bytes/multiples)? I
presume that it will be possible to restore the boot program if there is
some significant part of the eproms intact - opcodes anyway...
The disassembly should give some clues as to operation of the machine, too.
So, firstly I ask if anyone with a 1702 programmer who would be prepared to
handle copying these 4 eproms for me to wave their hands in the air. I'll
also need 4 of the 1702 eproms, so would appreciate anyone with those to
also wave their hands. And finally, I'm looking for a PC based 8080A
disassembler. My plan is to pull the chips and airmail them to a kind
volunteer. Actually - although I don't have a lot to spend - I will be most
happy to pay for the preservation (restoration?) of these data. I think its
important.
I do believe this machine is possibly unique; certainly rare - and worth
restoring properly. I would note that the cosmetics are near flawless;
this bodes well for the electronics inside, no?
Cheers
A
