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Morrow Wunderbuss Motherboard - Fried!
Recently I picked up an IMSAI 8080 with a Morrow Wunderbuss Thinker Toys Motherboard. From this picture: http://www.vintagecomputer.net/Morrow/wuderbuss_mb_s-100.jpg Note the fried electolytic capacitor. I am going to pick up the schematic tomorrow, and I have ordered replacement parts. ... read more - Total messages in this thread: 3 Last Post: Morrow Wunderbuss Motherboard - Fried! 05/25/2007 |
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MITS 8800B - Working
Here are some updated pictures. http://www.vintagecomputer.net/MITS/8800b/... read more - Total messages in this thread: 1 |
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On cleaning of PET keyboards...
I recently cleaned a PET 4032 keyboard by following the directions from the bottom of this page: http://www.portcommodore.com/petoper.php On this particular keyboard keys like Return and 0 on the keypad were almost non-operative. But after the cleaning, the whole keyboard is working like new! :... read more - Total messages in this thread: 1 |
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Epson DOS
We have an industrial machine (a Wire EDM) which is about 11 years old which runs on an Epson 486 PC. We have lost our copy of Epson DOS 3.1 the FORMAT & SYS files are what we really need we do have COMMAND.COM. Epsons DOS seems to use a different to MS DOS as MS DOS 6.1 will not read 3.5... read more - Total messages in this thread: 1 |
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Update - MITS Altair 680b
I spent a number of hours working on this system. I reviewed the documentation, tested the memory, and I picked up a ACIA monitor ROM from a kind member of the Altair Computer Club. http://groups.yahoo.com/group/altaircomputerclub/ All seemed to be working, but I was unable to send output throu... read more - Total messages in this thread: 1 |
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How to make a MS IBM DOS 1 boot disk
How to make a DOS 1.1 boot disk for an IBM PC with 360 K 5 1/4" drive: 1) download all files including the util directory: http://www.vintagecomputer.net/ibm/dos/1-1/ http://www.vintagecomputer.net/ibm/dos/1-1/UTIL/ You will need to (somehow) copy these files onto a blank, MS DOS formatted (... read more - Total messages in this thread: 2 Last Post: IBM DOS 3.3 Disk 11/16/2010 |
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Commodore PET 2001 Photos
A fellow Commodorian met me at my house today to help work on some PETs we have. In total 4 PET's were worked on today from less than functional systems 1) 2001-8 (sn 29652)- when tape loading program, some junk appears on screen see #2 below) 2) 2001-8 (sn 20343)- (bad keyboard replaced)... read more - Total messages in this thread: 4 Last Post: Commodore PET 2001 Photos 03/14/2007 |
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HP 2000A Reference Guide Scans Avail.
I have posted scans for the Hewlett Packard "A quick reference to HP Time-Shared BASIC" The guide was printed in 1969 for users of the HP 2000A. http://www.vintagecomputer.net/hp/2000A/... read more - Total messages in this thread: 1 |
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MITS Altair 680
directory of MITS Altair 680 pictures: http://www.vintagecomputer.net/MITS/680/pictures.html top/front corner view, main board - 680 MAIN BOARD REV 1-6X same, closeup same, another closeup of board ID same, another closeup front panel of MITS Altair 680. Compare colors with Byte back ... read more - Total messages in this thread: 3 Last Post: Not IC 74L12 03/05/2007 |
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1973 Williams Paddle Ball (PONG)
Here's an interesting one. An original 1973 PONG arcade clone by Williams, the future makers of Defender, Joust, etc. in the 80's. Paddle Ball according to web sources, was their first video game. I am told that Williams desired to compete with Atari's PONG arcade game with a version of thei... read more - Total messages in this thread: 3 Last Post: 1973 Williams Paddle Ball (PONG) 02/28/2007 |
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SWTPc to Altair 680 program transfer
Are the programs from the SWTPc 6800 interchangeable with the Altair 680? Is there a good web reference that compares these two? I have a working SWTPc 6800 and "SWTPc/Motorola" teletapes (programs for assembler, editor, etc). My plan is to load the tapes into memory of the SWTPc, perform whate... read more - Total messages in this thread: 3 Last Post: SWTP 4K BASIC on 680b 02/16/2007 |
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MFM hard drive formats only 10/20 MB...w
USing an IBM XT 640K with an IBM 1816101 hard drive controller and a Rodime RO204 hard drive. I "low level" formatted the drive using the IBM XT reference disk and fdisk'd with DOS 3.3. I then ran the format command /s. There were no errors, the correct number of cylinders were counted off (320c... read more - Total messages in this thread: 1 |
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Grumman C-8573 / ASA-79 Jet Computer
I was given a Grumman C-8573 / ASA-79 Jet Computer a few months ago, and I decided to open it up to see what was inside. I was told...that this was the computer from an F14, but I was unsure exactly which generation. After a good hour I finally opened up the box to reveal mid-80's components, not l... read more - Total messages in this thread: 1 |
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Messing with External Disk Drives
Me? I am working on some old disk drives, basically taking each one and testing on a RadioShack Coco II with a 502 FD cart/adapter. I have about 10 external (self powered) DD 5 1/4" disk drives that I nurse along. They are used for TRS 80 Model 1's with the expansion interface and a DD controller... read more - Total messages in this thread: 1 |
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Cottonwood BBS
http://hometown.aol.com/cottonwoodbbs/ +1 (951)242-3593 Located in Moreno Valley, California, USA. Operating 24 hours a day, at 300/1200/2400 baud. Running on a Commodore 64 with All American BBS The only remaining dial-up BBS run on a Commodore 64 in the world! Using the following I was... read more - Total messages in this thread: 1 |
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