Recall I suggested I had fear last night when I posted the message saying there could be a rescue but time was critical as the ownership of the building could...
28846
joshbensadon
Jan 5, 2013 3:44 am
... Thanks Dave, I've set it to 250V but it still does not scan. Jeff Jonas sent me the data, theory and application data. I've reversed engineered the...
28847
Evan Koblentz
ekoblentz
Jan 5, 2013 7:05 pm
See below. Curt's been a good friend to MARCH and to many of us personally. ... Subject: World's largest Mindset Computer Corp Collection available Date:...
28848
Jeff Jonas
jeff_s_jonas
Jan 5, 2013 8:17 pm
While researching Burroughs self-scan displays, I found some things of interest to MARCH, now available at http://ferretronix.com/march/pdf/ Building and...
28849
evan@...
ekoblentz
Jan 5, 2013 11:50 pm
We're all set for tomorrow and beyond. Alise and I picked up the generator from Jason H. tonight. He showed me how to use it -- very simple. Tomorrow morning...
28850
midatlanticretro@yaho...
Jan 6, 2013 3:19 pm
MARCH frequently asked questions -- updated Feb. 27, 2012 1. What is MARCH? MARCH is a user group for people who enjoy collecting, restoring, using, and...
28851
Stephen L
shlafferty
Jan 6, 2013 7:08 pm
... Thanks for the post, Jeff. Enjoyed reading about the "Tiny PDP-8". I was looking for a schematic and couldn't find it in the pdf or his website. Did I miss...
28852
s100doctor
Jan 6, 2013 8:22 pm
... Speaking for myself, Herb Johnson: http://www.retrotechnology.com/restore/sol_1.html http://www.retrotechnology.com/restore/marchfixit5_12.html Of the two...
28853
evan@...
ekoblentz
Jan 7, 2013 1:16 am
Jeff B., me, and Alise worked in the museum warehouse for five solid hours today, thanks to Jason H. loaning us the generator. We built four more shelving...
28854
who88777
Jan 7, 2013 5:55 pm
Hi Everyone, I've been spending the past while working on a web based emulator for the Altair 8800. It has gotten to the point where it is useable but not ...
28855
B. Degnan
billdeg
Jan 7, 2013 9:28 pm
... The backspace key does not work on the real terminal when using 4K BASIC. You may be able to backspace but then you'll get an error. So you're ok. why...
28856
who88777
Jan 8, 2013 1:34 am
I would still like for backspace to not leave the page even if it won't be read properly by the software. Paste is obviously not a feature of the original...
28857
billdeg
Jan 8, 2013 1:59 am
... I feel as if you're missing the point of the Altair, you're not supposed to have it so easy. :-) Loading BASIC with papertape took almost an hour before...
28858
who88777
Jan 8, 2013 2:14 am
... Haha, I feel like I got a taste of it toggling in those test programs on the front panel. I thought of not-preloading RAM with the JMP 0x8000 but the less...
28859
joshbensadon
Jan 8, 2013 3:13 am
... Hi Bill, Did it really take nearly an hour to load the paper tape? I have a paper tape reader and it doesn't take long to go through a role of tape. But...
28860
billdeg@...
billdeg
Jan 8, 2013 5:25 am
Sent from Windows Mail From: joshbensadon Sent: ‎January‎ ‎7‎, ‎2013 ‎10‎:‎13‎ ‎PM To: midatlanticretro@yahoogroups.com Subject:...
28861
corey986
Jan 8, 2013 12:35 pm
I think Bill wasn't complete in his explanation of "backspace". Yes it's unsupported, but 4k basic supports "rub out". Which is what makes the vintage...
28862
David Gesswein
dgesswein
Jan 8, 2013 12:56 pm
... On the Altair do you actually use the _ key for deleting a character? On a teletype they normally used the rubout key that gave code 127. On modern ...
28863
joshbensadon
Jan 8, 2013 1:49 pm
... Hi Bill, Yeah, I guess on a change of venue it would take the hour or probably more depending on the failure(s), but on a day to day process, the equipment...
28864
B. Degnan
billdeg
Jan 8, 2013 2:05 pm
... a ... than ... underscore ... In PDP 8 OS/8 using a glass vt102 terminal with a backspace key, under standard configuration, use of backspace will generate...
28865
corey986
Jan 8, 2013 2:54 pm
I 100% agree. Having to "flip" switches or even type in the ocal/hex by hand has made me a better programmer. This actually came up at dinner last night (I'm...
28866
corey986
Jan 8, 2013 3:07 pm
Hey Bill... I have an idea for VCF... I was thinking of bringing my Briel Altair to sit next to my real one. It's been modified to have an external serial...
28867
Mike Loewen
mloewen16823
Jan 8, 2013 3:13 pm
... It actually extends forward a bit to the micro era. If you were constrained to less than 64KB of RAM for your code (not considering overlay techniques),...
28868
Neil Cherry
linuxhomeaut...
Jan 8, 2013 3:33 pm
... This holds true of any restricted env such as a uC with limited resources. Of course when you've been around long enough and use larger computer resources ...
28869
B. Degnan
billdeg
Jan 8, 2013 4:34 pm
The teletype in the museum was converted to rs232. I don't know if it was also upgraded to a baud faster than 110 8/n/2. It should be possible to punch a...
28870
David Gesswein
dgesswein
Jan 8, 2013 5:33 pm
... Right, you have to use the rubout/delete key to correct a mistyped character. It will either do a backspace overwrite or print \ around the deleted...
28871
David Gesswein
dgesswein
Jan 8, 2013 5:36 pm
... Its still 110. It was reported that the punch was jamming so if someone wants to use is for a demo we should check it out at the next work day. I think its...
28872
corey986
Jan 8, 2013 5:42 pm
Can we set it to 8,n,1 or it is fixed at two stop bits. No big deal, we can simply put something inbetween to "echo" the data between the two removing the...
28873
evan@...
ekoblentz
Jan 8, 2013 6:26 pm
... I mostly agree. Definitely not letting anyone use our original copy of Altair 4K Basic. :)...
28874
who88777
Jan 8, 2013 6:45 pm
Some of the embedded FPGA work I've done really taught the value of this. Whenever possible I prefer to use the on chip block ram and not go external for cost...
