... Hello Steve, thanks a lot for the schematics. At the moment i have not so many manuals and schematics for the Altair. Mine 8800bt is on the way from UK to...
3154
deramp5113
Apr 1, 2013 8:18 pm
I had a small batch of brushed aluminum nameplates for the Altair 8800 made if anyone needs one. The MITS logo and blue swoosh are not raised, but the...
3155
John Crane
john_crane_59
Apr 2, 2013 3:57 am
Yes, I'm interested! Can I see a pic? Thanks, -John ... From: deramp5113 <deramp5113@...> Subject: [Altair Computer Club] Altair 8800 Nameplates To:...
3156
deramp5113
Apr 2, 2013 3:14 pm
John, Send me an email so I can reply to it with picture attachments. This board doesn't provide your full e-mail address and attachments can't be added to...
3157
B Degnan
billdeg
Apr 5, 2013 3:04 pm
Is a 1702R ePROM a "non-A" 1702? http://www.vintagecomputer.net/RCA/COSMAC/RCA_GMC-3901803_front.jpg Bill...
3158
Tom at Home
tdurston
Apr 6, 2013 12:16 am
Hmmmm. I think the number seen in th photo is not the part number, maybe a lot code, date code or? A little digital filtering suggests 4th character from the...
3159
B Degnan
billdeg
Apr 6, 2013 12:44 am
I scraped away the original label and checked again. Very clearly both proms read MF1702R date code 7436 See http://www.cpu-zone.com/1702/DSCF1888.JPG good...
3160
mfeberhard
Apr 6, 2013 5:15 pm
Those look like 1702 (plain) clones made by the Canadian company, Microsystems International. I believe that Intel was selling naked dies to Microsystems...
3161
mfeberhard
Apr 6, 2013 5:34 pm
The difference is that the 1702 (plain) draws a LOT more current during programming than the 1702A's - the upgrade to my programmer accounts for this extra...
3162
deramp5113
Apr 6, 2013 5:48 pm
The job of the Altair DBL is to load and then execute a second-stage loader which is present in sectors 0-n on track zero of a bootable floppy. The Altair DBL...
3163
B Degnan
billdeg
Apr 6, 2013 8:26 pm
Martin, I don't know how (yet) but after doing the mods I no longer get any voltage being sent through the rs232 driver. I need to determine why. All I did...
3164
corey986
Apr 7, 2013 4:25 pm
What I mean is as a "terminal"; for a basic program with an ASCII keyboard. I just picked one up (its in the mail) and due to lack of slots will need to remove...
3165
mfeberhard
Apr 7, 2013 10:14 pm
The Dazzler has abysmally low resolution - in its highest-resolution mode, it produces an image that is 128 pixels X 128 pixels. Assuming a very chunky 5X7...
3166
corey986
Apr 7, 2013 11:03 pm
Thanks, Actually as you recommended I was going to use my Sol-20 as a "terminal"; for now but eventually I wanted my altair to be "standalone". I already have...
3167
mfeberhard
Apr 8, 2013 4:41 am
Well, you could do what I've done with my Dazzler board... It's in a Cromemco Z-1 computer, together with their D+7A I/O and a pair of their JS-1 joysticks....
3168
mfeberhard
Apr 10, 2013 11:05 pm
If you have an ADS PROMBlaster or PROMBlaster II, you might be interested in the new file folder I created. It contains scans of the hardware and software...
3169
Kip Koon
drwho7777
Apr 11, 2013 1:33 am
Hi All, I have an Altair 8800 with no serial number sticker and another S-100 based computer both without any documentation. I have taken a picture of each ...
3170
mfeberhard
Apr 11, 2013 3:55 am
What a strange machine! The front panel isn't really a front panel such as the Altair's - it seems to be some sort of matrix display - 4 rows of 9 LEDs. I'm...
3171
Kip Koon
drwho7777
Apr 11, 2013 4:27 am
Martin, That is very good to know. I'll just keep them in that little S-100 case then. It is a very strange machine. I can't detach the front panel off this...
3172
steve
alltare
Apr 12, 2013 4:48 am
Very strange. No ID on the boards at all, eh? Your S-100 board may not be a true S-100, either. It looks too tall- more like the size of the Altair 680's...
3173
drwho7777
Apr 15, 2013 6:07 am
I have uploaded pictures of my unknown Z80 Computer for anyone who might be able to identify it and help me to find any documentation that might still exist....
3174
Kip Koon
drwho7777
Apr 15, 2013 7:59 am
Steve, Thank you for the invite to post my pictures. They are in the photo album called "Kip's Unknown Z80 Computer". I appreciate it. Kip From:...
3175
deramp5113
Apr 15, 2013 4:20 pm
Looks like this computer, made by "Processing Innovations," is a "Speech Aided Modem" (SAM) used as a gateway between hand-held inventory computers and a host...
3176
Kip Koon
drwho7777
Apr 15, 2013 9:57 pm
Mike, Thank you very much for the link. I appreciate it a lot. A Speech-Aided Modem. That is very interesting considering when it was developed. I would ...
3177
corey986
Apr 16, 2013 3:15 pm
http://groups.yahoo.com/group/retro-restore/ Everyone, for the non-Altair specific stuff and just general restoration tips and tricks, Mike Willegal (Apple-1,...
3178
corey986
Apr 22, 2013 1:01 am
I need a copy of the schematics to troubleshoot a ram problem. I think I have some bad ram chips but I also think there may be something else going on. All I...
3179
corey986
Apr 22, 2013 10:30 pm
Well lacking a copy of the schematics. I looked for the obvious and found a bad connection in a socket. It was a pain to find not having exact schematics,...
3180
deramp5113
Apr 23, 2013 12:28 am
That makes for a good day! I've got a RAM card that needs diagnosing, but I'm still looking for the motivation to dig in! Mike...
3181
Systems Glitch
twswva1
Apr 23, 2013 8:44 pm
... Herb Johnson has a copy, his reproduction fees are very reasonable and copies are high-quality. Thanks, Jonathan...
3182
deramp5113
May 12, 2013 4:24 pm
If like me, you've been tormented by the single-step portion of Don's popular video on YouTube, I now have closure! At issue is where the computer is...
