Latest Projects:
Site for info/pictures for S-100 Boards |
CompuPro Advertisementsby billdeg Total messages in this thread: 1 GodBout changed it's name to CompuPro in late 1980. Here are a few of the first ads from this era, 1980-1981: CompuPro CPU 8085/88 (8 - 16) CPU CompuPro Interfacer I and Interfacer II CompuPro Static RAM (various) CompuPro Product Listing Ad Download PDF format">... [ read more ] |
converting files from ascii to PRGby billdeg Total messages in this thread: 1 Let's say you write, scan, or transfer somehow an ASCII file that contains a BASIC program. How do you get it to your Commodore? Here is how I do it. The files are here 1. Start with an ASCII listing of your BASIC program. Save it as "myfile.txt" 2. Download all of the files from TOK64 to your PC (MS Windows) 3. This command will copy your code to PRG format TOK64 /toprg myfile.txt If that does not work, you may have to type TOK64 /list to see all commands. 4. The program will convert the ASCII program to Commdore PRG 5. Use D64 Editor to pack the PRG file you created (MYFILE.PRG (and any others you may wish to add) into a single disk image. You can start by creating an empty 64 image and then import MYFILE.PRG into it. 6. I use MM64 with RR-net op">... [ read more ] |
MITS 1440 Calculatorby billdeg Total messages in this thread: 1 The MITS Model 1440 was a electronic calculator kit first produced in 1972 before the Altair 8800. This calculator was capable of performing square, square root, and memory storage. It had 15 digit LED readout.  The 1972 MITS 1440 Calculator restoration by Bob Grieb of TaunTek.com
There were 6 integrated circuits ("ROMS") but Bob replaced the one marked FDY 360B-7006 with a modern equivalent he made himself(!). He also replaced at least one zener diode. He sent me a complete write up of the repairs and notes. Additional pictures and documents related to the 1440
GENERAL DESCRIPTION (from the Theory of Operation section of the manual)
"..The Model 1440 Calculator uses state-of-the-art MOS/LSI (Metal oxides substrate/large scale integratio">... [ read more ]
|
IMSAI 1.4 BASIC vs. MITS 8K BASICby billdeg Total messages in this thread: 35 Updated: [ Altair BASIC running on other machines ] 09/02/2009 I am working with the "Eliza" program found in the Jul-Aug 1977 Creative Computing magazine. It was written for MITS Altair BASIC, but I only have the IMSAI 1.4 BASIC. Lines like this are incompatible: 90 DIM C$(72),I$(72),K$(72),F$(72),S$(72),R$(72),P$(72),Z$(72) ..need to find a useful detailed guide to IMSAI 1.4 BASIC, better still a guide for converting MITS 8K BASIC to IMSAI 1.4 BASIC.">... [ read more ] |
Multi-Tech Systems MT25 EIA-CCITTby billdeg Total messages in this thread: 1 
Multi-Tech Systems MT25 EIA-CCITT Breakout / Monitor tester. A useful tool. ">... [ read more ]
|
Qume QVT-108by billdeg Total messages in this thread: 1  The Qume QVT-108 terminal appears to be 9600 baud terminal. This terminal came with a CompuPro 8086/8085 system and was probably used as the console.
A few more pictures">... [ read more ]
|
Zorba GC-200 Portableby billdeg Total messages in this thread: 3 Updated: [ Zorba Repairs ] 07/20/2011 I have received a non-functional Zorba portable model GC-200. It's in nice cosmetic shape, but does not complete a boot cycle, no screen output, no attempt to access diskette. The portables of this era all seem to have similar problems.  The portable with the quirky name - Zorba - was one of the last great CRT portables. This portable had dual 5 1/4" drives and ran a CP/M. It had non standard looking 25 pin female serial, parallel and IEEE  Modular Micros, Inc. sold the Zorba, but I am not sure if this was an exclusive deal or just a de">... [ read more ]
|
Shugart SA801 Inventoryby billdeg Total messages in this thread: 1 Shugart 801 inventory 5 Shugart 801's, none have yet been proven to work. Enclosures: Lobo twin 8" drive enclosure. Xerox twin 8" drive enclosure SN: x973 013718 New Old Stock drive in box. M35982 3/15/1982 NOTES 1. Removed boot drive from Lobo enclosure and replaced with the new old stock drive. made jumper changes to match original drive 2. Xerox drives not used #1 #2 ">... [ read more ] |
Vintage Computer Festival Video 2008by billdeg Total messages in this thread: 1 Demo of Space War on the PDP 8i captured on video, with ASR 33 and Calcomp Plotter: http://www.y...=JxVMtGFcc_s Towards the end there are a few snips of my exhibit from the festival as well. Here is a Youtube.com video of my Commodore SuperPet and D9090 from Dan Roganti: http://www.y...Mw0UEHoxU ...another one from Dan of the ENIAC development lecture http://www.yo...com/watch?v=TlZP3KeLRpw">... [ read more ] |
Timex Sinclair 1000 / ZX81by billdeg Total messages in this thread: 3 Updated: [ Looking for Sinclair Keyboard ] 08/23/2009 Here are some photos of some recently purchased Timex Sinclair 1000 / ZX81 items. There are 6 boxes of books and hardware, plus about 150 tape programs to catalog. Assembly programming for the Sinclair I can believe..Forth? I had no idea how seriously people took these machines. more to follow. I will probably put some of this up for sale, if anyone is interested, let me know. My favorite item is the Suntronics Sinclair keyboard kit. Makes the system so much more usable with a good keyboard. ">... [ read more ] |
Geniac Adby billdeg Total messages in this thread: 1 Astounding SCIENCE FICTION page 1 Advertisement:  This is an ad for the 1958 model of the Geniac computer kit. PDF ">... [ read more ]
|
MARCH's 2 PDP 11/05 computersby billdeg Total messages in this thread: 1 On my way home from MARCH's computer museum I took home two 11/05's for inspection. More on this later, but I was able to get one of them to read and write memory from the front panel, the other I was also able to get funcitonal aside from a stuck 7th bit in the 4K Core memory card. UPDATE: THe system with the bad core does not respond to any front panel input, the "working" system today would not power off when switching the key to the off position.">... [ read more ] |
SWTPc TV Typewriter IIby billdeg Total messages in this thread: 2 Updated: [ TV Typewriter II Restoration Update ] 08/08/2009 The original TV Typewriter on display in the MARCH museum was donated by Bill Dudley. I don't have any pictures at the moment. Bill showed up on Wednesday and we took the thing apart to see if it could be made functional again. Here are some project notes for future reference, I will come back to this post asap. 1. The keyboard attached to the unit is a George Risk. See same keyboard model I have the tech doc for the keyboard, but this was not necessary, all of the voltages checked out OK. The keyboard voltages and connections are good. We checked the repeat key mod Bill had made. We monitored the voltage coming into the TV Typerwriter from the keyboard. Each time a key was pressed, the voltage jumped 15 millivolts (from 80 to 95). We did not go so far as to verify that when you press an "a" you get an "a" sent by the ke">... [ read more ] |
IBM PC Convertible 5140 Laptopby billdeg Total messages in this thread: 3 Updated: [ 5140 Guide to Operations? ] 07/10/2009  What make these IBM laptops tick, anyway? Recently I have been learning more about what you can and can't do with an IBM 5140 laptop. It's a non-PS/2 from 1986 that was popular until the PS/2 laptops started appearing a few years later. Surprisingly, a lot of the units I have come across still have working batteries! I need more power supplies. Pictures of 5140's">... [ read more ] |
Resources:
Popular Topics and FAQs
Past Issues:
tcf 2013 Digital PDP8 Educomputer Gesswein
This image was selected at random from the archive. Click image for more photos and files from this set.
Total messages in this thread: 1
Well I have spent the past 2 months putting together a central database of most S-100 boards with pictures, comments and (where possible) manuals for each board for the web site www.S100Computers.com. If I had known it was going to be so much work I'm not sure I would have started! Anyway most of the major S-100 board companies are there. I obtained pictures and manuals from all over the web, my own fairly large collection, and pictures and manuals sent in by a number of great individuals who helped out. They are listed in the acknowledgement section. From the S-100 Boards section of www.S100Computers.com you arrive at a central page from which you go to each manufacture. To get started go here:- http://www...0Index%20Page.htm As you can see we are still missing pictures of a few boards (or they are very poor). A number of manuals are missing. Pleas">... [ read more ]