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· Altair Computer Club - A place for Altair enthusiasts and collectors.
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Founded: Nov 4, 1998
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Who has working Altair 88-DCDD or MITS 3202 series floppy drives?
Other than "W Tom," does anyone else in this group have a computer with working Altair 88-DCDD or MITS 3202 floppy drives?...
Feb 22, 2013
Altair CP/M, Lifeboard, Burcon and InfoWorld
This historical research and recreation stuff is interesting! I found an announcement from Lifeboat Associates for "Altair CP/M" in the July 1979 issue of...
Feb 20, 2013
Altair .dsk Folder, CP/M
Thanks Tom for spending the time and effort to transfer and post the disk images of some of your Altair 8 inch floppy collection -- great stuff! I downloaded...
Feb 17, 2013
i would like to make a suggestion. when replying to a post, it might be useful to remove all the stuff to which you are replying. it's somewhat time...
Feb 17, 2013
MBL PROM (Multi-Boot Loader) Issues
I recently installed an MBL PROM to exercise several serial port combinations by loading big files like 8K BASIC. My first combination was very standard - 8N1...
Feb 12, 2013
FS/FT: Jade 1P2S IO Board
(cross-posted from the MARCH mailing list) All, I've been going through and cleaning up/testing some of my spare S100 boards. Looks like I've got more than...
Feb 11, 2013
Files for Burcon (MITS) CP/M posted in the files section
I have created a new folder in the files section titled "Burcon (MITS) CPM." This folder contains an overview of Burcon CPM, a commented disassembly of the...
Feb 9, 2013
8800b Power Supply Modification
I'm repairing an 8800b that was dropped on the transformer corner. I've been looking at Altairs with upgraded power supplies. I've seen more than one Altair...
Feb 7, 2013
Programmer for MM5204 EPROMs
Hey All, With the raging success of the ME1702/A EPROM programmer (dozens sold), I decided to design a programmer for the National Semiconductor MM5204Q EPROM....
Feb 7, 2013
New full-function 1702A EPROM Programmer
Looking to program some 1702A EPROMs? Frustrated that all of the so-called 'universal
39; programmers can't program a 1702A? So was I... I have just completed...
Feb 4, 2013
What is the best way to repair a cut trace on a board with a solder
Should I scrape off some mask in the area and drop some solder on, or should I use one of those silvering pens they sell and then cover it with a green coat...
Feb 4, 2013
Is there a "group" like this for Sol-20
I finally took mine apart to get it running and underneath there are a lot of jumper wires and 2 cut traces. My sol had an 80 column video card. A duotronics...
Feb 3, 2013
CPM on 8800 using original Altair floppy
Does anyone have a copy of CPM 2.2 running on an 8800 using the original Altair floppy drive (88-DCDD)? Ideally, I'd like to see the CBIOS source, but even a...
Feb 2, 2013
Patching Altair Basic questions...
So back in the day it was common to have to patch Basic and other Mits software to work with different IO or with a video card. My question is how was this...
Jan 30, 2013
Before I reinvent the wheel...
I'm about to write routines to transfer an image of a floppy disk in an original Altair drive (77 tracks, 32 sectors per track, 137 bytes per sector) to a file...
Jan 28, 2013
8800b boards on eBay
Hi guys, I've finally put my remaining S-100 boards on eBay for anyone interested: MITS 16MCD 16K Dynamic memory card with Intel chips MITS boot PROM board...
Jan 17, 2013
38 years late, but now I finally own a working 8800!
Nobody in my circle of friends or family cares about this, so I'll post here! I purchased a non-working 8800b off eBay recently. The computer and boards are in...
Jan 17, 2013
Altairs with 240v power supplies?
I was just curious if the Altair's were produced with a 220-240 volt power supply for the UK, Europe and Australia market? - MrSmith...
Jan 15, 2013
MITS 908M Calculator Instruction Manual
I found the manual for the MITS 908M calculator and made a PDF: http://www.virtuala
com/pdf/MITS 908M Instruction Manual.pdf...
Jan 6, 2013
I apologize if this question has already been answered on this forum, but I can't find a clear answer: Is there a source for 8800 card guides? If an exact...
Dec 30, 2012
Programmer for MM5204 EPROMS?
Any interest in a programmer for the National Semiconductor MM5204 EPROM? This is another early PMOS EPROM that can't be programmed by most "universal&quo
Dec 25, 2012
4K BASIC V3.2 and 64K RAM
While working on a getting an 8800 with 64K of RAM working, I was able to get 8K BASIC V4.0 up and running, but 4K BASIC V3.2 would hang every time I pressed...
Dec 22, 2012
MITS Computer Notes
I sent a message about this last week but it vanished into the ether. So, would anyone be willing to hazard a guess as to the value of a full set of MITS...
Dec 8, 2012
Single-Step, Status Lights and Examine
Based on the schematic for the display/control board of the original Altair 8800, and the Theory of Operation Manual, the 8800 single-steps one machine cycle...
Dec 4, 2012
Should I be able to program a Cromemco Bytesaver 32K from Altair fro
I know I can't program my 8k bytesaver from the front panel and need the software to program eproms. However with the 32k Bytesaver according to the manual you...
Dec 2, 2012
Anyone have the hex files for the modified version of Dave Dunfield'
I'm looking for the 2SIO port 0 version. It's the monitor that can fit in 512 bytes and doesn't use any ram. I'd ask Dave, but this is a modified version of...
Nov 15, 2012
3P+S pretenting to be a MITS 88-2SIO update running basic...
Well finally got power back during the week and had some time today to go back and finish this little project. Success!!! (with TeraTerm, still need to work...
Nov 10, 2012
Martin and Corey, Thanks for the info and thread on the 3P+S. This weekend our computer club had a workshop and we got an Altair 8800a with a 3P+3...
Nov 1, 2012
Examine does not work
Hi Guys, I have a problem with an Altair 8800: deposit does work but when I want to recover the value from memory with examine too many lights blink. I tested...
Oct 28, 2012
OK besides Tera Term on the PC, is there a known Mac program to load
over the serial port. I have Zterm but I think it's messing with the binary. The only option I see is to "send text" other than Kermit,Zmodem Xmodem and...
Oct 28, 2012
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