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Action Computer Enterprise, Inc.

by billdeg - 03/20/2009
Total messages in this thread: 4
Last Post: [ Former Action Computer User Comment ] 12/18/2014
Little is known about the Discovery 500 Multiprocessor S-100 Computer by Action Computer Enterprise, Inc. I found ads for a similar system sold by the same company that appear in Byte magazines in 1981-1982, but no ads for the Discovery 500.
The Discovery 500 Multiprocessor S-100 Computer by Action Computer Enterprise, Inc. This is a "turnkey" system, note the key.
The multiprocessor calls the disk controller, but there is no functioning media. After checking for a disk in the floppy drive, the system searches the hard disk for an OS.
The hard drive makes a horrible screeching, I doubt I will be able to get too far with it. The hard drive is a Disctro... [ read more ]

A Better Way to Replace Keyboard Pads?

by billdeg - 12/18/2014
Total messages in this thread: 1
REPOST FROM CLASSICCMP: Message: 8 Date: Wed, 17 Dec 2014 22:30:42 -0500 (EST) From: Steven Hirsch To: Classic Computers Mailing List Subject: Keytronics foam pads revisited Message-ID: Content-Type: TEXT/PLAIN; format=flowed; charset=US-ASCII I've fixed a couple of keyboards using hobby shop track bed foam, but have not been very happy with the "feel". That foam is considerably less resilient than the material Keytronics used. After trying a number of alternate materials, I have found something that is almost identical to the original. Take a look at eBay #171549720453 for an example. "Podopro Polyfoam 5mm 45cmx22.5cm" It's 5mm thick with an adhesive backing, sold for shoe inserts. I stuck 0.075" plastic sheet to the backing, then turned it over and used spray adhesive for the aluminized mylar. Worked like a charm. Just finished resurrecting a N* Advan... [ read more ]

1964 Honeywell Sales Presentation

by billdeg - 12/14/2014
Total messages in this thread: 1
Honeywell 201 Central Processor Info Sheet
Honeywell 201 Central Processor Info Sheet from sales presentation. For larger image see Section 3b from the link below.
May 1st, 1964 the Honeywell Electronic Data Processing Division Bala-Cynwyd office sales team led by Stephen S. Berry (Sales Representative) and H.L. Sweatt (Branch Sales Mgr) submitted their proposal to DuPont Company to upgrade the Treasurer's Department computer system. DuPont had been running an IBM 1401 system but they were looking to upgrade. Initial discussions between the two companies appear to have been about the H-200 computer. After assessing the needs of the Treasurer's Department, Honeywell is shown to suggest that DuPont instead acquire a system comprising of combination of H-800/1800, H-300, and co... [ read more ]

Replace External Filter Digital RK05

by billdeg - 12/12/2014
Total messages in this thread: 1
Original filter removed from the rear card cage opening of the Digital RK05 drive.
After a few aborted attempts Dave G helped me take apart the PDP 8e system so it could be de-racked and moved into the basement. Finally. Before I re-cabled the drives to the computer I decided to replace the filter in the back of each drive where the cards are connected to the cables. I went to the local hardware store and bought general purpose filters, then cut to fit. If you're replacing your own DEC filter the product I used is 3M Filtrete #0412560 carbon pre-filter... [ read more ]

1968 Hitachi HIDIC 100 Mini Computer

by billdeg - 12/08/2014
Total messages in this thread: 1
Hitachi HIDIC100 mini computer brochure cover
The cover of the Hitachi HIDIC 100 Mini Computer brochure. Click image for more photos and a pdf of selected photos, not the full brochure
To do...scan the entire brochure. Anyone have info on this computer? I know of other mini's in the HIDIC line but I never read anything about this one. I believe it's an industrial minicomputer sold only in Japan. I need to find a way to optically scan Japanese or find someone who can read Japanese....stand by.... [ read more ]

Bendix G-15 Coding Manual

by billdeg - 12/07/2014
Total messages in this thread: 1
Color cover of the Bendix G-15 Coding Manual
Color scan cover of the 1959 Bendix G-15 Coding Manual. Click image for larger view.
PDF of manual on Bitsavers: http://bitsa...CodingManual.pdf See a Bendix G-15 in person at the Mid-Atlantic Retro Computing Hobbyists Computer Museum at InfoAge in Wall, NJ, USA.... [ read more ]

1993 Digital DECpc XL 566

by billdeg - 11/24/2014
Total messages in this thread: 1
Digital DECpc XL 566
In November 1993 Digital Equipment Corp introduced its XL line of PC computers which included two Pentium I CPU PCs, the DECpc XL 560 and 566. The price for the model shown here was $4,399. Click image for larger view.
This particular machine works quite well and is very clean. I plan to set it up as a vintage 1995 web designer PC, with my original programs and files from that era. This one has an ethernet card in it, which is kind of cheating, the average designer in 1995 would have had a 33.6 kbaud modem. On the other hand if you could afford $4000+ for a PC in 1995 you might was well throw in an Ethernet card as well, eh? Photos... [ read more ]

CBM BX700 Pictures

by billdeg - 11/18/2014
Total messages in this thread: 1
Commodore BX700
CBM BX700 with chassis propped open. Click image for larger view.
CBM 8088 B Series Math Co-Processor
View of the 8088 co-processor board used to boot MS DOS and CP/M 86 OS. Click image for larger view.
A few new photos of the rare Commodore "BX700", a B-Series prototype with no ID badge or S/N label. The BX700 is not to be confused with the European B700 / American CBM B128-80.... [ read more ]

Mainframe / MiniComputer User Manuals

by billdeg - 11/18/2014
Total messages in this thread: 1
Mainframe and Minicomputer paper documents
Here is a snapshot photo of my basement floor sorting project, everything is being cataloged and sorted by manufacturer and model. I will eventually catalog all of this and post here...Click image for larger view.
More photos... [ read more ]

UNIVAC 1219

by billdeg - 03/18/2007
Total messages in this thread: 5
Last Post: [ UNIVAC 1219 / 418 Models ] 11/13/2014
Here is a link to the "Univac 1219 Military Computer General Description" brochre: Hi-res Images... [ read more ]

SuperPET ComboBoard Revisions

by billdeg - 11/05/2014
Total messages in this thread: 2
Last Post: [ SuperPet U47 - not a 2764 ] 11/09/2014
I have a SuperPET ComboBoard with a bad 970018-12 (slot U47)...I assume there is no source for the original ROMS...From what I found on the web, this is just a 2764. I will try to make a copy of the one good ROM. I found this site http://mhv.bplaced...s/cbmroms.php SuperPET Waterloo $A and $B (U47) A000 - BFFF Anyway, soon I will see how it goes to make a replacement ROM from scratch. Regarding the two spare Combo boards I have on hand; one is an original Combo board, and one a "Rev D". Both boards are good other than the one bad ROM that I have to share between the two. I did not realize there was more than one rev of the SuperPet Combo board. The big difference is that J2 (the switch port) is in a different positi... [ read more ]

Using CBM 4040 and SuperPET in 6809 Mode

by billdeg - 10/31/2014
Total messages in this thread: 1
CBM SuperPET Switch Settings for 6809 Mode
This is a view of the CBM SuperPET switch settings for 6809 mode. In this position one can run the Waterloo development languages including Pascal, COBOL, Fortran, BASIC, and Assembler. Click image for larger view.
The topic of conversation came up as to whether one could run the SuperPET Waterloo software from a 4040 drive. Being that the 4040 is the IEEE dual-drive equivalent of the 1541 drive, it would then be possible copy the disk as a D64 for easier transport and poss use on an actual serial drive with an adapter. [ read more ]

Tandy 1000 Series MS DOS Computers

by billdeg - 10/23/2014
Total messages in this thread: 1
Tandy 1000 SX 25-1052B
Tandy 1000 SX 25-1052B. This unit has a 10 Mb hard drive and single 360K diskette. Click image to see additional photos of this model.
Tandy 1000 HX 256K
Tandy 1000 HX base model with one 720K disk drive and 256K RAM. Click image to see additional photos of the 1000 HX model
Tandy 1000 HX 640K
This is an upgraded 640K 1000 HX with two 720K disk drives. Click image to see larger view.
[ read more ]

Altos 5-5AD

by billdeg - 09/27/2005
Total messages in this thread: 8
Last Post: [ OASIS Account Info and System Update ] 10/16/2014
Died on the table. I can sometimes get it to boot, but the hard drive is now dead. For about three hours I used this system, with Wyse terminal, M/PM OS. Then "click click click..." This unit was rebranded and sold as part of a business system by a company called Sentinel, and they called the system the "Dimension Five" ... [ read more ]

AT&T UNIX PC 3B1 vs. 7300

by billdeg - 06/28/2008
Total messages in this thread: 5
Last Post: [ Using an External Terminal ] 10/12/2014
I received some AT&T UNIX PC parts this week from Mike Lee ( http://www.geekmuseum.org ) Specifically he sent me most of a UNIX PC "7300" model. I own a dead "3B1" model, which can be differentiated from the 7300 by it's raised monitor. I could not find any 3B1 images on the web, below is a link to my system's pics. There are plenty of the 7300's on the web. Anyway, I started into diagnosing what was wrong with my system, and his too. I was hoping to be able to merge my dead system with the parts from Mike's and create a working system. Almost... It turns out that the later model of the UNIX PC, the 3B1, has a different power supply than the older 7300 variants. Mike sent me a "middle version" 7300 with 1 MB onboard RAM. He sent me two good power supplies. Unfortunately neither will work on the 3B1, not the same juice. I checked with volt meter, compared with interne... [ read more ]
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