by billdeg
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The thread date indicated last update. Suggest a site here. Bitsavers Software and Document Archive https://bitsave...avers.trailing-edge.com (mirror) Retroarchive Multi-Platform http://www.retroarchive.org (not secure) TextFiles.com rTTY Art Repository http://artsc...es.com/rtty/COLLECTION/ (not secure) Dave Dunfield's Site - vintage computer newbies should start here, disk archiving info here https://www.classi...dunfield Motherboard and Floppy Controller Test Results Relating to Disk Archiving https://rails...tfdc.htm Glitchworks Products and Projects https://users....vintage.html Bryan's Old Computers Document Archive https://bytecol...com/m8_docs.htm Knut Roll-Lund's Vintage Computing https:/">... [ read more ]

by billdeg
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Click for larger image.

In 2011 I described a project related to Northstar System Monitor 1.5, and to boot CP/M or anything using a Northstar disk controller. Click here to read. Use the link below to download the Northstar and other 2708 ROM images Today I got a new ePROM reader / burner from "kris at mygeekhobby.com", who builds/sells Matt Millan's design. https://www.mat...-mcm68766-eproms/ In a matter of minutes I was up and going. I started with my unknown 2708s. Until I got this reader I had to fire up my IMSAI 8080 to read the ROMS that way. A newly-constructed Arduino-made-eProm burner is a lu">... [ read more ]

by billdeg
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A single core memory plane from an IBM 1401. Click image for larger view.

This memory plane was on display at the Kennett Classic computer museum but the frame broke in three places. With care, the frame and wires were reassembled as you see here, by using strong clamps and superglue. From page 9 of the IBM 140 Data Processing System Reference Manual: "... The IBM 1401 Data Processing System uses maganetic-core storage for storing instructions and data (Figures 10 and 11). All data in core storage is instantly available, and the specical design of the core-storage unit makes each position individually addressable. This means an instructrion can designate the exact storage locations that contain the datta needed">... [ read more ]

by billdeg
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Updated: [ ROM Dump for DS-2000 ] 09/16/2025

The HAL Communications Corp HAL DS2000 KSR smart terminal. Click on image for larger view.

The manual refers to this BMC monitor, so I assume it was purchased along with the KSR unit. Click on image for larger view.

Here is a nice big pic of the boards and wiring view, with the case open. Click on image for larger view.

More pics What's next? Attach it to a computer expecting a current loop as if the HAL were a Teletype. There is also Morse code and Baudout communications.">... [ read more ]

by billdeg
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This list is maintained regularly. Thread date is last update. Contact me Here. IBM 9000S. A scientific PC produced with at the same time as the IBM XT with built-in printer (?) M7261 KD11-B CPU board 1 CONTROL LOGIC & MICROPROGRAMMED MODULE (PDP 11/05 or 11/10) Findex portable computer (any model) PCS Micropac 80, Superpac 180 and related DVW Microelectronics Husky Commodore B Series hi-profile keyboard(s) AT&T UNIX PC keyboard(s) Computer Data Systems "Versatile 2" s-100 computer 1977 (Newark, Delaware USA computer) Casio FX-9000P Canon CX-1 or BX-3 Acorn BBC Model A Eagle Computer Eagle II E (I have disks, need computer) Sord SM80X Oki 1F COM7 laptop Morrow Decision 1 Microvoice Nugen Sycor Model 302 Key-Cassette Terminal California Technology International 1108-A Manual/documentation Any mid 70'">... [ read more ]

by billdeg
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On the right is an Alpha (local company in the Phila Area or a computer show vendor) Pentium I. On the left is the screen output from the computer. You might be able to pick out the specs. Windows 95 OS. (Ignore the AT&T 6300 in the middle)

The computer's file dates and software range from February 1996 through to the end of 1996 and then mysteriously this computer was never apparently used again. Beautiful shape, a total time capsule from 1996. Rare Pentium 60 (I believe) that would have been the best "generic PC show" processor available in early 1996. I had just 4 months earlier also bought a Pentium 60 for myself. Pentium was total cutting edge then and I remember the purchase broke my bank account. PC shows were still popular in the mid">... [ read more ]

by billdeg
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Updated: [ What was the First Pesonal Computer? ] 05/12/2025

Radio Electronics December 1970 National Radio Institute's ( NRI ) full-page advertisement for their Model 832 digital computer trainer. The ad appeared in electronics magazines through 1972. Click image for larger view.

The 1970 NRI Digital Computer Model 832 was a trainer kit that was developed in 1970 and sold for $504 US when first introduced. It pre-dates the similar Kenbak computer by many months. Click image for larger view.

... [ read more ]

by billdeg
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Updated: [ Additional Details 8080 CramerKit ] 04/17/2025

Cramer Electronics Incorporated started advertising this 8080 kit microcomputer, the "Cramerkit", in late 1975 for $495 (or was it $1495?) but none were delivered until the spring of 1976. The Cramerkit was a designed by Microcomputer Technique Inc. and was shipped partially assembled. Click image for larger view.

I managed to find a partial view of the product advertising, from Electronics magazine April 1976. According to the advertisement, the assembly of the kit takes minutes, meaning the wirewrapping and sockets are done at the factory. Download The owner of thi">... [ read more ]

by billdeg
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NOTE: date of thread = the last update date. Note there are some old specific item for-sale threads on this site. If they're not linked from here, they're probably expired/sold. RK06 Alignment Disk RK06 Data Disks UNIBUS Regulators (parts / not guaranteed but easily restored) More! FOR SALE If we have items for sale, visit our eCommerce site at Kennett Classic: https://www.kennettclassic.com/surplus/ href="/price_list.cfm">Mostly Commodore and Tandy stuff here History of Commodore Poster Items Wanted Free Stuff? (Varies every day. Donations held by me and not claimed by VCfed (who has first dibs) are avail you're a VCFed member. I have tons of spare cables and adapters. Pickup only) Contact me if you have a specific request. ">... [ read more ]

by billdeg
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Here's an Executive, the model that came out after the original Osborne I. Click image for larger view.

">... [ read more ]

by billdeg
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Here is the original wording of the computer lab humor "keep off" message, ACHTUNG, found in computer labs throughout the later 1960s and 1970s. This print is dated 1967 and is the oldest-known original printed version.

">... [ read more ]

by billdeg
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Updated: [ Keyboard Replaced ] 06/11/2021

This Osborne 1b (later models came with with the "bluer trim") includes an innovative external display prosthetic device designed to hold the monitor level on top of the computer while in use. Click image for larger view.

Here is another view of the system. Click image for larger view.

This "Drive C:" expansion unit fits into the disk holder of the computer and functions a">... [ read more ]

by billdeg
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Updated: [ Flip Chip Boards Replaced ] 06/29/2024

Drew helping wheel our new DEC PDP-8 computer, donated to Kennett Classic museum in late October 2022. I drove the computer from Chicago a few weeks after VCF MW.

Front panel view, DEC PDP-8 computer

This is the rack model acquired in late fall 2022. The system can run the "chase the lights" program indicating a minimum CPU function. Powering off and then on again, the system retains the values of the chase the lights program and will re-run again. NEXT: Document cards installed, detailed pictures and testing with a Teletype ASR 33. Just so you know, I have powered up this system 25 times and worked with the front panel, but I wanted to clear a good block of">... [ read more ]

by billdeg
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This is the extremely rare 1982 Leading Edge MP-1673 L also known as the Model M ("M" because they used Mitsubishi parts). Click image for larger view.

Anyone have a 1982 Leading Edge Model M? "M" for Mitsubishi parts. Not easy to find them. So I was wondering if there might be a 1982 Mitsubishi PC sold in Japan....? There is the 1982 Mitsubishi Multi16 - a CP/M computer:(16 bit? but it's not MS DOS) https://www.reddit...i16_1982/ Mitsubishi could have put out a PC of their own but they chose to partner with Leading Edge instead. As many of you know the Japanese stayed with CP/M longer than the US. Or maybe Mitsub. sold Leading Edge Model M's as "Mitsubishi" OEM in Japan b">... [ read more ]

by billdeg
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Updated: [ Call from Beckman alumni ] 10/30/2024

Beckman Instruments, Inc. made a connected industrial research computer system called the DEXTIR, which was designed for to prepare data for computer entry. The model pictured in this photo was installed at the ESSO Research Labs in Baton Rouge, LA in July 1961. Click image for larger view.

Beckman issued a proposal to GM some time after the above photo was taken for an automatic monitoring and control system for the Die Casting Department of the Guide Lamp Division at General Motors. The comptuer that the DEXTIR would feed its data was (I believe) a UNIVAC 1108 computer from the same era. Perhaps also an IBM 704, 709, 7090) Download it here To my knowledge there is nothing published about this machine.">... [ read more ]