I'm not sure if this is copacetic but I'm selling my pride and joy MITS Altair 8800a on eBay at: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3404786716 ...
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EarthMall
Mar 7, 2003 8:02 pm
I've got an Altair 8800 T-shirt up on ebay if anyone is interested. Check it out at: http://cgi.ebay.com/ws/eBayISAPI.dll? ...
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EarthMall
Mar 7, 2003 11:40 pm
I made a mistake on the link. Go to: http://www.islandseven.com/altair Thanks, James...
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EarthMall
Mar 7, 2003 11:46 pm
Here is the new link for the Altair 8800 T-shirts: http://www.islandseven.com/altair...
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richie_zero86
Apr 9, 2003 5:58 am
hey i was wondering if anyone here has the schematics for the altair 8080 or any hybrid of it available or would be willing to scan them for me? i really...
274
davidgari
Apr 18, 2003 10:47 pm
Copies of original manuals w/schematics are offered for reasonable prices by group member 'alltare' a.k.a. Steve Shepard at (where else but):...
275
Richie
richie_zero86
Apr 20, 2003 8:14 am
... From: davidgari To: altaircomputerclub@yahoogroups.com Sent: Friday, April 18, 2003 3:47 PM Subject: [Altair Computer Club] Re: Schematics for Altair 8080 ...
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alltare
Apr 20, 2003 10:50 pm
While we're on the subject of documentation, I wonder if anyone out there has a manual and/or a schematic for MITS' audio sweep generator. I would be happy to...
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Mike_Gregory
Apr 26, 2003 3:20 am
All members, I need some help locating a schmatic & parts layout for subject main board. The November 75 issue of popular electronics Altair 680 construction...
278
ErikSKlein
May 6, 2003 3:38 am
Hello all, I just found this group while poking away at the net. I'm glad there's a community of Altair users/collectors. . . First off, I have a Vintage...
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akessel
May 6, 2003 12:40 pm
The serial cable that is used on the BT is wired differently from the one on the 8800 - depends on the card of course. If you have a 2sio card, I have a...
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alltare
May 6, 2003 6:58 pm
Erik, These questions/comments come to mind: How are you booting the 8800? Are you directly addressing and executing the boot PROM, using a turnkey board with...
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Erik Klein
ErikSKlein
May 6, 2003 10:05 pm
I've inserted my responses below. Hopefully the formatting isn't too screwy. alltare <no_reply@yahoogroups.com> wrote: Erik, These questions/comments come to...
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akessel
May 6, 2003 10:25 pm
Here is your problem ... at 177000 so I turn the machine on, raise stop and reset simultaneously, raise the first 8 switches (A15-A8) and raise Examine. I...
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Erik S. Klein
ErikSKlein
May 6, 2003 11:08 pm
I've done that and I've tried other variations based on the sense switch settings indicated in the Altair BASIC manual - even the ones that had nothing to do...
284
alltare
May 7, 2003 3:01 am
Erik, You're lucky to have two machines to compare, even if they aren't the same models. Troubleshooting is a lot tougher with just one computer. I think...
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Erik S. Klein
ErikSKlein
May 7, 2003 3:28 am
... I'm certainly having an easier time troubleshooting now that I have a known-good configuration. I've had my 8800 and 8800a with their drives for about a...
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akessel
May 7, 2003 4:14 am
One other suggestion if you want to test things and you have the mbl prom. I have binarys of the extended disk basic you can upload to the 8800 using the mbl...
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alltare
May 7, 2003 5:22 pm
Erik, Yes, the MBL and DBL/MDBL can be on your 2K PROM board or turnkey board at the same time. Just jump to or examine one or the other starting address as...
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alltare
May 8, 2003 3:05 am
There's a pretty rare Altair on ebay right now at http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2727111132 (ebay item #2727111132). It's called an "Icom...
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Erik S. Klein
ErikSKlein
May 8, 2003 3:44 am
Yeah, I've got that one on my watch list. I doubt I can justify it right now (I just spent a bit on a couple of other machines), but if it stays within reason...
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Erik S. Klein
ErikSKlein
May 15, 2003 3:32 am
Bummer, I was the number 2 bidder. Outsniped at the last second! :-) Unfortunately I just spent a bunch of my hobby money or I'd have had more to commit. Erik...
291
Erik S. Klein
ErikSKlein
May 15, 2003 3:42 am
... That’s good information. I’ll have to do some playing with the MBL and serial uploads from my PC emulating a tape or paper tape device. ... As it...
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alltare
May 15, 2003 5:11 am
$185 seems pretty cheap for any Altair, even if it turns out to be a dog. If I didn't already have one, I would have bid a lot more than that. The winning...
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Larry T.
larryt91311
May 21, 2003 11:20 pm
Actually, most of the controllers for 8" drives that I know were soft sector. Only the original MITS and ICOM controllers were for hard sector media. And...
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stevenaleach
May 25, 2003 8:51 pm
Hello, I just retrieved an Altair 8800B from storage, blew away the dusts, checked connections, etc. finally I powered it up, lights flickered in a promising...
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stevenaleach
May 25, 2003 8:53 pm
... and ... next ... Oh, forgot to update my email address on Yahoo.. it is now stevenaleach@.......
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alltare
May 26, 2003 4:36 pm
C4 is 22UF/35Volts. It's used at the input of VR1, an LM320, as the -9V (VDD) supply. To protect as much as possible, I suggest that you pull out ALL boards...
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stevenaleach
May 27, 2003 2:43 pm
Has anyone found a good replacement for 8800B two position address switches? I've had a bad switch ever since I've had the machine, and never had the guts to...
298
Erik Klein
ErikSKlein
May 27, 2003 3:58 pm
... I agree. Once you have the whole thing apart, you might as well fix everything. These machines are a pain to work on. I've had an 8800a apart for over a...
