A business trip has me going to Albuquerque next week and I have Monday
afternoon free. Can anyone suggest some must see computer surplus
shops?
Thanks Norm
While again searching for radio stuff :), I ran across this website in
Australia with an interesting article written in 1954 about the Morgan
Crucible Co. Ltd, and how they justified their purchase of the HEC4
Electronic Computer. From the first few paragraphs:
"The computer selected was the HEC4 Electronic Computer designed by the
British Tabulating Machine Co (later becoming ICT and then ICL - who
re-named it the ICT 1201), which was used with modified Hollerith
punched card equipment for I/O peripherals. Systems were designed to use
conventional 80 column punched card equipment for much processing
(sorters, collators, tabulators and reproducers). Details of this
machine are described in a second article below. Both articles were
published in the "Electronic Engineers Reference Book" for 1958. The
cost of the machine was about ?30,000."
Also included are the specifications of this machine:
Specifications of ICT HEC4
HEC4 Brief Specifications
P.R.F.
38.4 kc/s
Number base
Binary
Mode
Serial
Word Time
1.25 milliseconds
Word length
39 and sign
Instruction type
1 operand; 1 next instruction
Magnetic Drum
3,000 rpm; 64 tracks; 1024 words;
track switching 5 milliseconds;
18.75 milliseconds max. access
Quick Access stores
2 words
Add or Subtract
2.5 milliseconds
Multiply
800 milliseconds max.; 240 milliseconds ave
(slow)
50 milliseconds max.; 22.5 milliseconds ave
(fast)
Divide
48.75 milliseconds
Punched cards
100 cards per minute (in); 100 cards per minute
(out)
Printer
100 lines per minute; 100 characters per line
Price
?30,000
http://www.vk2bv.org/sb/hec4.htm
/* coming out of the shadows.... */
I'm planning on exhibiting my MOS Kim-1 at the Trenton Computer
Festival (http://www.tcf-nj.org) and it occurred to me that I don't
know what this computer is worth (whatever that means). My Kim-1 works
and is a Rev B MOS unit, with original blue-cover manuals (as well as
home brew case and a home brew 2k memory expansion).
The only data point I have is a recent ebay auction, where 2 working
Kim-1s, nice enclosures, Kim Extender Interface, 4 memory cards, S100
breadboarding card, issues of "Micro", etc went for $642. The item
description doesn't mention Rev #, or even whether its a MOS or
Commodore (though the photo shows *white* manuals).
So... roughly $300 for a Kim-1?
Thanks!
Scott
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>I registed to a local freecycling group. I receive several tens of
>emails each day. 80 percent are wanting and 20 percent are offering. I
>would expect the reversed ratio.
Why would you expect the reverse? Do you have 80% more items to give away
then what you would like to take?
-chris
<http://www.mythtech.net>
I just rescued a power supply and power entry module from what remained
of a QBA11-VA. From what remained of the housing it looked like a
disk/tape/CDROM enclosure. Available for the cost of shipping.
CRC
Hi Brad,
the connection from the controller board (UNIBUS or QBUS) is a straight
cable AFAIK. The RX01 and RX02 exist as a table top box and uses a DB25
connector to the controller.
If you want to make a complete RX01 drive, the first thing to check is
the *bottom*. Since many parts have been removed for perhaps completing
other drives, check if the drive belt is still there on each drive!
The RX01/RX02 drives have *two* boards mounted on top of the disk drives
and they cover bothe drives, so they are not smallish.
Tony gave (as usual) a good description.
I was surprised to read that the two boards are somehow matched. That is
a pity because I have two *sets*, and since one board has a rather high
connector (relative to the other components on that board, and the other
board is a bit smaller, I have put those two boards together. So there
is a chance that they are kept as a set togethre but I am not 100% sure.
I have also a complete power supply, but it is wired for Europe, that is,
it is set for 230/240 VAC 50 Hz. I don't know if there are taps on the
transformer to make it work at 110 V. Neither if it can cope with 60 Hz.
And I have also the fan and air plenum that is mounted on the back of
the drives ...
> Sounds like you have rather a lot to find.
>
> -tony
Well, it looks that I have all what you need. I stripped an RX01 just a
few weeks ago, and the only parts that I threw away is the metal front
(heavily scratched) and the metal frame on which all is mounted).
Small problem though, the power supply is heavy ...
and I live in The Netherlands ! BTW, I do not have spare belts :~)
- Henk, PA8PDP.
Hi,
Found the problem with the SC/MP. I don't have the SC/MP programming
manual but have figured out there was a difference of opinion between me
and TASM on a few instructions. I now understand all the SC/MP instructions
and TASM's expectations.
Anyway, it's advanced from the prototype breadboard stage and it's now
a permanent system - all soldered and complete.
For those that are interested, it's a SC/MP II (ISPA/600D) running at 2.048Mhz.
It's got 2 x 4K (2732) EPROM, 2 x 2K (6116) RAM, 1 x 8251 USART and
1 x 8255 PPI. I've got the comms and PPI working a treat and now I've got to
embark on the fun task of creating a debug/monitor for it.
Does anyone else here build old stuff like this? Or do you build your own debug
and monitor software? Any experimenters/builders here?
river
This is a test, please ignore.
-----------------------------------------
Evan Koblentz's personal homepage: www.snarc.net
*** Tell your friends about the (free!) Computer Collector Newsletter
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Hi Jay - be happy to help you give the site a spruce up
Here are some samples of my work
www.workcover.comwww.maqohsc.sa.gov.auwww.region2ops.on.net (this concept would make a good ClassicCMP web
site :-)
www.advancedimaging.com.auwww.barossashops.comwww.gawlershops.comwww.salvationarmy.org.au/gawler
++++++++++
Kevin Parker
Web Services Consultant
WorkCover Corporation
p: 08 8233 2548
m: 0418 806 166
e: kparker at workcover.com
w: www.workcover.com
++++++++++
-----Original Message-----
From: cctech-bounces at classiccmp.org
[mailto:cctech-bounces at classiccmp.org] On Behalf Of Jay West
Sent: Wednesday, 6 April 2005 3:12 AM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: input sought for list
I'm looking for input from the list as to things that should be in the
classiccmp list FAQ. I've got lots of ideas, but want to hit ideas I may
not have thought of (I'm old, I forget ;))
If you have any text you think should be included in the FAQ, or ideas
you'd like me to come up with text for, please email me offlist for
review.
In addition, I think it's high time to spruce up the classiccmp website.
I'm not a web developer, so if anyone is good with HTML and would like
to help maintain the classiccmp website, email me, your services would
be appreciated! Along the same lines, I'm also looking for suggestions
to improve the classiccmp website as to content and features. Any
thoughts are appreciated!
Regards,
Jay West
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Any opinion expressed in this e-mail may not necessarily be that of the
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Looking around the local salvation army, I spotted a LaserWriter plus.
I've searched the archives and discovered it's a PostScript enabled laser
printer with RS-442 interface. It seems. No disucssion of the "plus"
specifically. If it helps, there was a DB-25, a DE-9 and small (4? 6?)
dip switch on the back (that I remember, I don't remember any mini-DIN).
I'd be interested in having a "real" postscript printer. But I'd like to
test it before buying.
- Is there a way to print a test page w/o pluging into a computer?
- Can this be interface to a straight PC? If the DB-25 is RS-232, I'd
assume so.
- Is toner readily available?
Also, there was an ImageWriter II if anyone wants one.
Thank you,
-Philip
