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Rare White Label MITS Altair 680

by jfreek82 - 10/13/2011
Total messages in this thread: 2
Last Post: [ Altair 680 sells for $2800 on Ebay ] 10/28/2011
Hi, I am selling a Rare White Labe MITS Altair 680 Computer w/ all Original Documentation plus extras. All in excellent condition. The auction is here: The computer is in great condition and there are a lot of pictures in the auction. There is no reserve. Please contact me with any questions. Thanks. -Mike ... [ read more ]

Vintage Computer Festival MW 2011

by billdeg - 09/28/2011
Total messages in this thread: 1
A few of the exhibitors talk shop during off-hours.
Event Photos... [ read more ]

An 8086 Monitor for an S-100 Bus system

by monahan_z - 09/19/2011
Total messages in this thread: 1
I have been writing 8086 code for a fairly comprehensive 8086 monitor (~9000 lines of code) that with a number of new S-100 boards (an 8086 board, our IDE Board, our ZFDC board , our PIC-RTC Board and the Propeller driven Console IO board) allows one to boot MS-DOS. The goal is to have hardware and a BIOS so that standard generic MS-DOS (or FreeDOS) does not know it's not talking to a PC motherboard. This turned out to be more difficult than I thought. Most major PC software interrupts (0-20H) have to be emulated in very precise ways. Anyway delighted to say MS-DOS (V4.01) now boots up on 3.5" floppies or on a CF-Card with our IDE drive S-100 board. Thanks to this group BTW for suggesting NASM. Fantastic assembler If you have time take a look at http://s100computers...itor/8086%20Monitor.htm there are a few short videos there that show the... [ read more ]

Ohio Scientific Challenger 1P

by billdeg - 09/16/2011
Total messages in this thread: 3
Last Post: [ OSI C1P Update - RAM and Cassette ] 09/18/2011
Ohio Scientific produced the Challenger 1P model in 1978. This model is S/N 7110, was assembled and tested by "Ann T" on 6-22-1979
More OSI Challenger 1 Pics ... [ read more ]

Synertek VIM-1

by billdeg - 09/12/2011
Total messages in this thread: 1
The Synertek VIM-1 single board computer from 1978 was engineered around the 6502 processor and was very similar to the MOS/Commodore KIM-1. Later versions of the VIM-1 were renamed SYM-1 at some point early in production, making the VIM-1 rare, but also more likely to be "buggy". Note the message "SY1.0" that appears in the display.
I actually have two VIM-1 computers, they both boot to the SY1.0 monitor screen, so far, I will post updates as things progress. Pictures... [ read more ]

Gateway 2000 P5-75

by billdeg - 09/05/2011
Total messages in this thread: 1
A very early home desktop personal computer (not a server) with a Pentium 75 processor, the Gateway 2000 P5-75.
I picked this system up from a computer repair store for $10. It's got Win 3.11 installed with a 16/4 ethernet card used to connect with an AS/400. I am not sure if Windows 95 would have been released yet, the chip dates are from 1994. The P75 is pretty early Pentium. Even earlier was the Compaq Deskpro 5/66M which was featured in Byte July 1993. Cost, $9500.... [ read more ]

Texas Instruments TM990/189 SBC

by billdeg - 08/27/2011
Total messages in this thread: 1
Here is a closeup of the Texas Instruments TM990/189 single board computer display sold by TI in the late 70's and early 80's. Click image for larger version.
This system is unique due to its calculator-type input panel and display. I was able to write and run a short program to add two hex numbers successfully. The computer is in like-new condition and operates very well.
The TM990/189 looks like a TI 59 calculator stuck on a large computer board. Click image for larger version.
The single board... [ read more ]

MITS Altair 220043K (43rd Kit made)

by billdeg - 08/14/2011
Total messages in this thread: 1
Bruce Damer's YouTube video about the oldest mint condition Altair 8800 computer.... http://www...h?v=nuMCs2Qym7Y From this video I learned that the first two digits of the original MITS Altair 8800 were always 22. Interesting. I discovered that right behind me in my workshop I have had the 43rd MITS Altair kit made. Serial number 220043K. Wow. This kit would have been shipped in January 1975. At the time there was a huge demand for the kits and I don't think it's unreasonable to assume they shipped at least 43 kits by the end of January. That also assumes the kits were mailed in the same order as the serial number, but I don't know. Bruce had factory-assembled #47, a boxed Altair 8800 with S/N 220047A - where the "A" indicates factory-assembled. Anyway just a factoid. Altair 8800 S/N 220043K A while ag... [ read more ]

Tauntek In-Cicuit Emulator testing

by billdeg - 08/01/2011
Total messages in this thread: 1 - an in-circuit emulator for the Intel 8080 microprocessor. I have three Poly 88 computers to test, and I have an 8080 ICE by Tauntek to use for testing. This thread will contain testing and restoration notes, log output, and descriptions of how the 808o ICE is used as a tool. The baseline machine will be a MITS Altair 8800a that I know works properly. I will compare and contrast results between the Altair and the Poly 88's, and then the IMSAI 8080. I have also done a few tests with a Processor Tech Sol-20, but it's not electrically sound yet for real testing. NEXT: Test RAM cards in the Altair so that I have a few working cards for testing unknown systems.... [ read more ]

ASCII Art on PDP 8e

by billdeg - 07/21/2011
Total messages in this thread: 2
Last Post: [ Power Use PDP 8/e with twin RK05s ] 07/31/2011
SNOOPY.BA ASCII Output... [ read more ]

Recently Acquired Drives Inventory

by billdeg - 07/27/2011
Total messages in this thread: 1
The date of thread will equal the last update date. WD Caviar 2700 HD with controller. Also matching 3.5 1.44" and 5 1/4" with controller and cables. Came from early Pentium system, untested but good shape WD Caviar 31200 1281.9 MB (1.2GB) WD Caviar 2540 540 MB Chinon FB-357 3.5" drive in 5 1/4" half-height enclosure. Quantum Fireball CX - QTY=1 Quantum Fireball 3.8 GB - QTY=4 Seagate ST351A/X Seagate ST3630A 631MB Seagate ST3491A 420MB, with Hewlett Packard 1.44 drive, set. Seagate Medalist 2132 / ST32132A with cables and 3.5" drive, RAM Seagate ST-412 HD full height 5 1/4" IBM OEM DDRS-34560 1998 IBM Type 0665 full height 5 1/4" P/N 9088526 IBM drive 1/2 height 5 1/4" with controller Teac FD-334HF 3.5" Doub Den, from old 8088 laptop... [ read more ]

Looking for Ferguson Bigboard I & II

by enrlaz - 07/05/2011
Total messages in this thread: 3
Last Post: [ Asking for info ] 07/06/2011
Hi at all, i'm looking for as i written in object. My website is I'd like to enter in contact also with people who had or has even now those SBC, or had or has its addons daughterboards like DSDD FDC, memory expansion, and so on. Thanks in advance for any help. Enrico - Pisa - ITALY... [ read more ]

A New 8086 CPU Board, Monitor, CPM86

by monahan_z - 06/25/2011
Total messages in this thread: 1
Well after 3 months of work and 3 prototype S-100 boards later (thanks Andrew!) I think we finally have an 8086 S-100 board we really like. It runs at 8MHz (two IO wait states) on the S100 bus and appears to be very reliable. Realizing that moving from a Z80 to an 8086 system is difficult for many people I wrote a very extensive 8086 monitor to help you get going. I have written up a fairly detailed step by step process to help people get going. (When the production boards come I will of course add the step by step construction notes). Also I have written up a complete section explaining how to build a CPM86+ operating system with only an CPM(80) system working. All necessary files are included. Here are the pages:- http://s100comp...itor/8086%20Monitor.htm... [ read more ]

Original MITS Altair 680 on eBay

by transient - 06/16/2011
Total messages in this thread: 1
Hi, I am selling an Original Complete MITS Altair 680 Computer with an expander board, 2 memory boards and an I/O board in excellent condition. The auction is here: http://cgi.ebay...tem=290577848590 The computer is in great condition and there are a lot of pictures in the auction. There is no reserve. Please contact me with any questions. Thanks. -Glenn... [ read more ]

A Propeller Driven S100 Console-IO Board

by monahan_z - 05/24/2011
Total messages in this thread: 2
Last Post: [ S100 Console-IO Board ] 05/27/2011
Andrew and I have now finished our Propeller driven S-100 Console-IO board. This board allows you to utilize a standard IBM-PC keyboard for Console input and outputs a standard VGA signal (e.g. for a modern LCD display). There are a number of port and status bit jumpers that should allow the board to be transparently spliced into most old S-100 systems without any software changes. While the hardware for the board is done, there is ample room for a good Propeller "Spin" programmer to improve upon the software to increase the boards current 80X24 resolution. Please see here for more information:- http://s1...IO%20Board.htm Enjoy... [ read more ]
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