BASIC
On Mon, Jan 4, 2021 at 13:17 Mark W. Farnham <mwf@xxxxxxxx> wrote:
Excellent sonic replay! I whistled the link carrier tone before it came on--
and it was right on pitch!
I wish I had a picture or could find one on line of using a fred box and
two acoustic modems to make computers talk to each other pre-internet.
Part of the process of establishing the link was to whistle the carrier
tone to move from the teletype’s modem where you got a remote program ready
to talk to one of the modems connected to the fred box. Transmitting the
source code and then verifying it was a bear until things like DaTapaSS and
Kermit were written with cdc and limpfel zif to ask for real time
retransmission. It turns out sending files twice and running diff was the
pragmatic solution, occasionally sending a third copy if groking which line
was the good one was a challenge on differences. And yes, everything was
line numbered so our “xdiff” program could easily synch up. When you’re
porting to 26 different targets, you had better write a portable diff of
your own…
it was a real drag when one of them could only do 300 baud…
Okay, for 42 points:
1) What was the hardest target to get the handshake of the sending and
receiving target to work on? (CDC chronos was 2nd hardest.)
2) What was the most portable language circa 1981-1984? (OMG. 40 years
ago.)
mwf
*From:* oaktable-bounce@xxxxxxxxxxxxx [mailto:
oaktable-bounce@xxxxxxxxxxxxx] *On Behalf Of *douglas rady
*Sent:* Monday, January 04, 2021 1:58 PM
*To:* oaktable@xxxxxxxxxxxxx
*Subject:* [oaktable] OT: Dial-up visual
Remember what that dial-up modem sounded like?
Here's what it looked like ...
https://www.windytan.com/2012/11/the-sound-of-dialup-pictured.html
