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Mac 128K with SAD MAC error 041800

by billdeg
Total messages in this thread: 6
Updated: [ Bad internal Drive Seek ] 11/29/2018
yes, but what does 041800 mean exactly? which chip or section is bad? 04 = class code = memory test mod 3 1800 = chip identification codes, in binary combination 1000 is bit 12, chip G9 0800 is bit 11, chip G8 Need two 4264 chips, to replace G9 and G8. Thanks Herb.">... [ read more ]

1968 Hitachi HIDIC 100 Mini Computer

by billdeg
Total messages in this thread: 2
Updated: [ HIDIC 100 Brochure Scan ] 11/23/2018
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 ]

Godbout Static (RAM) But Not Lost

by billdeg
Total messages in this thread: 1
Bill Godbout
Bill Godbout died November 11, 2018 in the "Camp Fire" in Northern California, the worst fire recorded in the history of California. Bill Godbout was an early microcomputer industry pioneer whose company Godbout / Compupro based in the Silicon Valley was known for it's quality products. Godbout started as a surplus electronics parts company that expanded into S-100 bus peripheral card manufacture for MITS Altair and other S-100 systems. Godbout began selling complete S-100 systems in the later 1970's and changed it's name to CompuPro. The CompuPro line of S-100 bus systems were sold well into the mid 1980's. Click image for larger view.
... [ read more ]

Rolm Corp 1601 RuggedNova 1970

by billdeg
Total messages in this thread: 1
Back cover of the Rolm Corporation Model 1601 RuggedNova model minicomputer. Click image for larger view.
Product Brochures and Price List Received this from Classic CMP "...One of the more interesting problems we faced at ROLM MSC (as opposed to the telecom side) was the fact that all hardware was designed to be tri-service. Salt spray and fungal resistance required that the cases be sealed with thermal frames to conduct heat to external heat exchangers, but that created interesting issues when sticking the box on an aircraft (but was a lifesaver with disk drives, as otherwise flying heads had a tendency to crash with altitude). The chassis ended up being quite heavy due to the hammer and drop tests (as others have noted,">... [ read more ]

1967, Developments in Computer Firmware

by billdeg
Total messages in this thread: 1
Cover Electronics April 17, 1967. Click image to download selected pages in PDF format
Interesting short article that describes the state of computer firmware in 1967, and recent developments. This is the copy of Electronics that would have been sold on the day of my birth. What other computers are shown in the PDF linked above? PDP 8 and IBM 1710.">... [ read more ]


by billdeg
Total messages in this thread: 3
Updated: [ Experimenting with Video ] 10/16/2018
BASIS 108 Apple II Clone Computer
The West German-made BASIS 108 was an Apple II clone with a Z80 processor and built-in video features. This unit has 128K RAM. Click image for larger view.
System power checked out, clean inside, boots Apple Pascal OS. No obvious restoration needed. After a more thorough check-out, I will explore the monitor program (6502) and attempt to boot CP/M, and Apple II programs in color. Photos">... [ read more ]

RIP Microsoft Co-founder Paul Allen

by billdeg
Total messages in this thread: 1
Paul Allen Microsoft co-founder
Paul Allen Microsoft Co-Founder 1953 - 2018 Click image for larger view.
I am sure he never saw it, but I once sold Vulcan Electrics, his computer museum project, my Xerox Star computer many years ago, for his computer museum. It's probably in a shed somewhere or stripped for parts. http://www.vul...r-paul-allen-dies-at-65">... [ read more ]

VCF Mid West ECCC 2018

by billdeg
Total messages in this thread: 1
The opening minutes of the 2018 Vintage Computer Festival slash Emergency Commodore Computer Convention, September 15, 2018. Click image for larger view.
Cactus 6502
Z demonstrating his Cactus 6502 computer with front panel. Click image for larger view.
Can you guess what computer is under the hood of this add-on keyboard? Click image for larger view.
... [ read more ]

Radio Shack TRS 80 Model 1 26-1008

by billdeg
Total messages in this thread: 1
Radio Shack TRS 80 Model model 26-1008
The Radio Shack TRS 80 Model 1 26-1008 to my knowledge never appeared in the Radio Shack catalog and was never officially sold in stores. Obviously a few were made, but how many I do not know. Click image for larger view.
Radio Shack TRS 80 Model model 26-1008
Given the serial number, at least 38 and probably a hundred or so 26-1008 model number Model 1's were produced. Click image for larger view.
Radio Sha... [ read more ]

Loading PDP 11 BASIC Papertape

by billdeg
Total messages in this thread: 1
After replacing the reader (again) I was able to load PDP 11 BASIC using my Teletype ASR 33. The computer system is my recently repaired PDP 11/05 S. Pictured is the pile of tape the makes up the BASIC program. It takes about 20-30 minutes or so to load the program. Click image for larger view.
If everything goes right, immediately after loading the tape the system initiates the BASIC program and displays the initialization prompt, *O. Click image for larger view.
Appendix D - The Bootstrap and Absolute Loaders (step by step how t">... [ read more ]

Dan Roganti RIP

by billdeg
Total messages in this thread: 1
Dan Roganti
Dan Roganti.
Dan lost his battle with cancer and we all lost a titan in the vintage computing community. Dan was one of the earliest members of MARCH. He taught me a great deal about S-100 and related hardware engineering. Dan attended all of the early hardware workshops I hosted at my house and we had many hours working into the night on a wide variety of systems including but not limited to the MITS Altair, IMSAI 8080, PET 2001, Heathkit EC-1, ASR 33 Teletypes, Apple II, and so on.
Dan Roganti doing what he di">... [ read more ]

RK11-D Installation

by billdeg
Total messages in this thread: 4
Updated: [ RE: PDP 11/05 and RK05 power connectors ] 08/31/2018
Digital RK05 disk packs
Digital RK05 disk packs. Click image for larger view.
I have the RK05 card set and backplane RK11-D. Picture: htt...11D-MM-002.pdf Cards and Backplane (minus UNIBUS cables): http://www.tec...ontroller.jpg RK11-D is a 4-card backplane RK11-D RK05 Disk Controller EK-RK11D-MM-002 M7254 Status Control M7255 Disk Control M7256 Registers M7257 Bus Control">... [ read more ]

Digital (DEC) PDP 11/05 NC Assembly

by billdeg
Total messages in this thread: 22
Updated: [ 11/05 NC Power Connectors ] 08/31/2018
Ted Nelson speaks quite highly of the Digital PDP 11 series in his book Computer Lib / Dream Machines.
Picture of the PDP 11/05 NC card cage and M9970(in the wrong slot). Click image for hi res version.
The only thing that prevented DEC from launching the PC revolution three years earlier was price, in my opinion. All of the other ingredients were there for a fine PC. The PDP 11/05 was the OEM version of the PDP 11/10, so you find all kinds of variations of this system sometimes paired with the DEC GT40 Graphic Display Terminal. Complete set of Pictures Some notes... 1) Cleaned (enough for now).. got all of the styrofoam peanuts, dust. 2) Started with an ... [ read more ]

MITS Altair AM Radio Music Jukebox

by billdeg
Total messages in this thread: 3
Updated: [ Altair Jukebox Video ] 08/27/2018
MITS Altair8800b AM Radio Jukebox Project
MITS Altair "Jukebox" system with GE Radio on top. Click image for larger view.
MITS Altair8800b AM Radio Jukebox Project
MITS Altair "Jukebox" system exhibit at the 2018 Vintage Computer Festival. Click image for larger view.
Steve Dompier's May 1975 People's Computer Company newsletter article Music of a Sort (republished in Dr. Dobbs Feb 1976) describes how one would generate music with a MITS Altair by using the fro">... [ read more ]

Seiko Data-2000 1983/4 Early Smart Watch

by billdeg
Total messages in this thread: 1
Seiko Data-2000 Smartwatch
The Seiko DATA-2000 was an early smart watch sold in late 1983 through 1984 that came with a special PDA calculator interface keyboard. I have read that this was the first watch with a keyboard. The retail price was $195. Click for larger view.
Seiko Data-2000 Smartwatch Docked
In the docked position the Data-2000 watch face serves as a dot matrix display for the QWERTY keyboard. Together the watch and keyboard provide PDA functionality to do thinkgs like enter and store memos (up to 100 lines), calculator functions, set the alarm, etc. Transm">... [ read more ]
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