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Forum: Altair 8800 05-31-2012, 08:54 AM
Replies: 0
Views: 15,406
Posted By Forbin376
APE Altair Peripheral Emulator

APE has a new home: http://home.comcast.net/~forbin376

Since OfficeLive.com is no more....
Forum: Altair 8800 08-06-2009, 06:24 AM
Replies: 29
Views: 62,725
Posted By Forbin376
I was there when...

Hi Phil,
“I was there when…” in high school we saw the ad for the MITS Altair 8800 in Popular Electronics and all wanted one. Well, I built mine in 1976 as a senior high school electronics...
Forum: Chit Chat 06-10-2008, 11:51 PM
Replies: 8
Views: 174,655
Posted By Forbin376
Paper Tape Loaders - back then

Thanks Geoff. I used to have the loaders committed to memory but that was 30 some years ago. I had made a laminated card with the main 88-2SIO loader on it for the 12K 3.2 Altair BASIC and actually...
Forum: Chit Chat 06-10-2008, 11:35 PM
Replies: 8
Views: 174,655
Posted By Forbin376
ASR-33 and 88-2SIO

I always ran mine as 8-N-2 for all operations. ALtair BASIC itself does not care as it strips any incomming parity bit (as does CP/M) by ANDing the incomming data with 7F Hex (177 octal). During...
Forum: Chit Chat 06-10-2008, 05:03 AM
Replies: 8
Views: 174,655
Posted By Forbin376
Altair 4K BASIC Loader

Looks like this is what we will need:

http://www.solivant.com/altair_bootloaders/

I do remember using the front panel a lot putting in this program.

Frank
Forum: Chit Chat 06-10-2008, 04:45 AM
Replies: 8
Views: 174,655
Posted By Forbin376
MITS Paper Tapes

I take it that you have access to a working paper tape punch! I'd be happy to test a tape for you. I have a Remex high-speed paper tape reader interfaced to a MITS 4-PIO board. I have not used it...
Forum: Altair 8800 04-03-2008, 02:19 AM
Replies: 1
Views: 11,926
Posted By Forbin376
Additional information (pictures)...

...is available here:

http://frankbarberis.tech.officelive.com/SerialBus.aspx

Frank
Forum: Altair 8800 03-31-2008, 01:16 AM
Replies: 0
Views: 11,899
Posted By Forbin376
APE - To mimic: The Altair Peripheral Emulator

For those of you with an Altair, RAM, and a MITS 88-2SIO this site may be of interest:

http://frankbarberis.tech.officelive.com/default.aspx

Frank
Forum: Altair 8800 03-21-2008, 02:44 AM
Replies: 1
Views: 11,926
Posted By Forbin376
19,200 Baud from a 2SIO

Pin 3 of IC G can supply the correct clock for either (or both) of the 6850 Chips ICs D & E to operate at 19200 baud. I have inserted a 16-pin IC socket into the clock select pads labeled with the...
Forum: Altair 8800 02-22-2008, 05:19 AM
Replies: 5
Views: 39,893
Posted By Forbin376
Amazing

Grant you are truly doing some amazing work. My scanner is an Epson CX-6400. It's a flat bed but without any kind of a feeder. The results are good but it takes a lot of time. I don't see any...
Forum: Altair 8800 01-13-2008, 08:06 PM
Replies: 5
Views: 39,893
Posted By Forbin376
Old Altair (and related) Manuals

I have been inspired by Grant’s work here to start a preservation project of my own as an owner of both an Altair 8800A and an Altair 8800B. To that end I have the following manuals. I can scan...
Forum: Altair 8800 01-06-2008, 05:45 AM
Replies: 4
Views: 11,635
Posted By Forbin376
Wow!

You can almost read the bits....<grin>. I'll start looking through what I have and see what may be of intrest to the community here.
Forum: Altair 8800 01-06-2008, 01:39 AM
Replies: 1
Views: 13,403
Posted By Forbin376
I have my "A" and all the books in the garage...

...so I'll see what I can come up with. I really do need to get back into this "old" stuff. It was a lot of fun and gave a much better sense of achivement than some of the work I do today. I still...
Forum: Altair 8800 01-06-2008, 01:30 AM
Replies: 5
Views: 12,551
Posted By Forbin376
Build and enjoy!

Build it after CAREFULLY duplicating the 1702 PROM for the front panel. Be extra careful with static discharge when working with the 4000 series chips as they are early CMOS and rather sensative. I...
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