Re: [midatlanticretro] Altair 680 Basic - loading without papertape
- Here's some info about patching the Basic for the SWTPC
I like to getting it running on mine too.
I wonder if its the same as in the Byte issue ? ( I dont have that issue)
[ My Corner of Cyberspace http://ragooman.home.comcast.net/ ]
B. Degnan wrote:
> Thanks. Maybe in the mean time I can try it on my SWTPc 6800. I will try
> to track down the BASIC or convert it using the info from Byte issue
> #8. I think that there's more memory, I have to check.
> At 06:24 PM 5/2/2007 -0400, you wrote:
> >ahh, yes, you still need the extra memory.
> >Altair Basic is 8Kbytes for either the 8800 or the 680 models.
> >And then there's only a few bytes left onboard to actually write a
> >You might want to contact Grant at his website to get the larger memory
> >The last time (Jan) I talked to him he was still in the middle of
> >building this.
> >I think it was 64KB on one card.
> >http://www.altairkit.com/ <http://www.altairkit.com/>
> >FYI, alot of the manuals are freely available online here too
> >I updated my webpage with other notes I received from Grant.
> >[ My Corner of Cyberspace http://ragooman.home.comcast.net/
> <http://ragooman.home.comcast.net/> ]
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- Dan <ragooman@...> wrote:
>Just a small point of information. The "text file" is actually a hex
> After we talked about running Basic on the 680 back at TCF, I looked up
> the info that Grant Stockly sent. Here's the message(below) that Grant
> posted on the Altair group a while ago about loading Basic into the
> Altair 680 without using cassette or papertape. He has the complete
> papertape converted into a textfile. He already emailed me a copy. The
> instructions and this is are on my webpage
> <http://ragooman.home.comcast.net/computers_altair680.html>. Once I get
> done putting the new sockets into mine I'm going to try this too.
file dump, with some embedded comment lines. The format is known as
"Motorola S-record format", similar to Intel's hex record format for
their 8080 and later processors. Bytes are represented as two hex
characters. A hex record in either format has some address
information, several bytes of data, and a checksum byte. Hex format is
obviously convenient for either "text" files or for paper tapes; it's
human-readable as well. Hex is a little more efficient than octal, and
a LOT more convenient than binary in this context. intel, and
Motorola, have standards for these hex formats. If you have to change
a byte here and there, it's good to have the standard document around.
Herbert R. Johnson, New Jersey USA
http://www.retrotechnology.com/herbs_stuff/ web site
http://www.retrotechnology.net/herbs_stuff/ domain mirror
my email address: hjohnson AAT retrotechnology DOTT com
if no reply, try in a few days: herbjohnson ATT comcast DOTT net
"Herb's Stuff": old Mac, SGI, 8-inch floppy drives
S-100 IMSAI Altair computers, docs, by "Dr. S-100"