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MITS Altair 680 16K RAM

by billdeg - 04/15/2013
Total messages in this thread: 3
Last Post: [ MITS 680 16K RAM installed ] 01/23/2014
MITS Altair 680 16K Static RAM card.
Close up of the MITS Altair 680 16K Static RAM card.
Front (before restoration) Rear (before restoration) So far I have de-soldered a bad socket. Most of the components will need to be replaced. More to come.... [ read more ]

1972 Casio-mini calculator

by billdeg - 01/17/2014
Total messages in this thread: 1
1972 CASIO-MINI calculator
The 1972 Casio-mini was the first handheld calculator. Over 2 million units were sold. This calculator helped launch the PC revolution - how? The inexpensive mini and other early handheld calculators forced other manufacturers, like MITS, out of the market (see MITS 1440)..looking for a new business MITS went on to produce the Altair 8800 computer and the rest was history. Click on image for larger view.
More Casio Mini pictures... [ read more ]

Xerox Alto RAM MM5280D boards

by billdeg - 01/09/2014
Total messages in this thread: 1
Xerox Alto MM5280D RAM chips 1976
Close up view of a Xerox Alto RAM board 16K dynamic MM5280D RAM chips, which have a silkscreen production date code of mid 1976. Click image for larger view.
Actual RAM boards are too large for my flat-bed scanner, so I took two scans of each RAM board imaged. I also have a third similar board, that's the source of the close up RAM chip view. Each board is 128K I believe, 16-bit. More photos.... [ read more ]

Intel 1974 P1103 Dynamic RAM Board

by billdeg - 01/09/2014
Total messages in this thread: 1
Intel branded RAM board populated with with P1103 dynamic RAM chips. Click image for larger view.
Not sure if the IA078 sticker on the board is the board ID or just a Q/A sticker. The board also has MOS Rev A printed on it. I believe "7410" printed on the board is the production date. More info needed. More photos... [ read more ]

Commodore VIC-20 Photos

by billdeg - 12/27/2013
Total messages in this thread: 1
Commodore VIC-20
The Commodore VIC-20 Computer. Click image for larger view.
VIC-20 Omega Race Cart
The VIC-20 Omega Race cart splash screen. Click image for larger view.
More photos... [ read more ]

Burroughs Boards - Experts out there?

by billdeg - 12/27/2013
Total messages in this thread: 1
I have a number of Burroughs boards that have the same bus/pin board as the board shown above. The chip dates are late 70's. Click image to see photos.
This one is interesting. Although not pictured, the label on the front of the toggle switch of this Burroughs card says Normal / I.P.H . Click image to see photos.
Not 100% sure this is a L5000 or some slightly never model. Click image to see photos.
I need to accurately iden... [ read more ]

Intel iSBC 80/10 Multibus System Board

by billdeg - 12/26/2013
Total messages in this thread: 1
Intel iSBC 80/10
Intel 8080 iSBC 80/10 CPU Board from around 1980. Click Image for larger view.
More photos M. Thompson says: The docs for that iSBC 80/10 board are in Bitsavers in: http://bitsavers.tr...dge.com/pdf/intel/iSBC/... [ read more ]

IBM Mainframe Tube Modules

by billdeg - 12/24/2013
Total messages in this thread: 1
Photo of the 4 tube units with tubes installed. From left to right: (?? no markings) / IN-306 / AM-308 / AM-3(?)23. Note that the unit with no markings has a cap kludged to the side. Click for larger view
Photo of the 10 tube units with NO tubes installed. From left to right: AM-320 / IN-501 / (no marking) / AM-3(?)23 / IN-501 / TR-307 / CF-311 / AM-306 / AM-312 / IN-307. Click for larger view
The subject of this thread will be the Ebay auction for the "Mark 1" tubes from 1951.... http://www.eba...DULE-/131073757653 ... Afte... [ read more ]

Mystery Items - Can You Help?

by billdeg - 12/24/2013
Total messages in this thread: 1
Can you ID the above or any of the cards here? ... [ read more ]

Burroughs L5000 Controller Card Photos

by billdeg - 12/23/2013
Total messages in this thread: 1
Burroughs L5000 MPA RAM board. The 1449 1112 RAM chips are Burroughs' part number for the intel 2102 RAM. Click image to see photos.
See also (used as reference, but unconfirmed) http://www...llery/bpgcomponents.htm... [ read more ]

The Elstart Amigo Computer Ad

by billdeg - 12/16/2013
Total messages in this thread: 1
Box from the Elstart Amigo computer system.
... [ read more ]

IBM PS/2 Model 25 8525

by billdeg - 11/07/2013
Total messages in this thread: 1
This is the first computer I bought with my own money, as a college student. At the time this was the perfect system for a school work...no more waiting in line in the computer lab for an IBM XT or MAC SE with the other students. The Model 8525 first appeared in the Spring 1987, just after the initial PS/2 launch.
Model 1391472 model M "space saver keyboard" had no number pad.
This system shipped with DOS 3.3. I purchased the optional Windows 1.04 "Collegiate Kit" that had early versions of Winwrite and winpaint programs. To print I used an IBM ProPrinter II. More photos... [ read more ]

Atari 130XE

by billdeg - 11/05/2013
Total messages in this thread: 1
The Atari 130XE Computer.
Here is a view of the rear ports. Note that a person could still use Atari 400/800 carts on the 130XE model. In many ways the 130XE was the Atari equivalent of the Commodore 128 in that both were backwards compatible and both were primarily used by their owners to run older software originally purchased for an older model system. As with the C-128, there were not as many 130XE-specific software packages was produced.
More photos... [ read more ]

Desk Top Computers May 1967

by billdeg - 10/09/2013
Total messages in this thread: 1
Radio Electronics May 1967
One of the earliest known references to the term "desk top computers" known. The obscured text at the bottom reads: New generation ... What they do . . How they work
Sage 1 calculator computer
The Sage 1, an example of the programmable calculators featured in the article.
"As recently as 15 years ago, according to the American Federation of Information Processing Societies (AFIPS), there were fewer than 25 computers at work in all of the U.S. That number has grown today to well over 35,000, and the AFIPS predicts that by 1975 there will be more than 85,000-representing an annual investment of $30 billion..." The article defines desk top computers i... [ read more ]

Commodore 64K C-116 Mods

by billdeg - 08/13/2013
Total messages in this thread: 7
Last Post: [ JiffyDOS for 264 Installed ] 10/03/2013
Commodore C-116 Computer
The 1984 Commodore C-116 was the smallest and one of the rarest Commodore computers ever produced commercially.
Commodore C-116 view of original 4116 RAM chips. NOTE: the original 318004-04 Kernal ROM has already been swapped out, pictured is a 3180005-05 NTSC ROM (from a Plus/4). Click for larger view.
Project - Switch PAL C-116 to NTSC and upgrade the RAM to 64K. These two changes will create a mini Plus/4. Together with a uIEC cart for storage and a mini-flatpanel screen from a portable CD player I will have a nice portable Commodore syst... [ read more ]
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