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Originally Posted by engstrom So Andrew, did you have to learn to whistle a 300 baud carrier tone when picking up a telephone handset on the same line as the BBS to disconnect a previous caller who had their connection abruptly dropped?
Those were the good old days. :) |
Man.. OK>. now you did it.. and yes I am hijacking this thread.
First off, yes I could whistle the tone to negotiate a carrier detect with 300 - 9600 baud modems. What can I say, I am talented.
But here is where it gets funny. I "upgraded" to the Hayes Smartmodem 300 (external RS232/serial) which had AutoAnswer.. what a novel concept. BUT here is the thing.. We wrote the BBS software ourselves on a TI-99/4A (later an Apple IIe, then onto a 386SX-16 IBM Clone)...and within all of the tools/compilers we had there was (or we couldn't find it) no memory address to "peek" to detect Carrier Detect (or LACK THERE OF). Our solution: Take the RS232 cable peel back one of the unused wires, add a resistor, and connect up to the CD LED on the front of the Smartmodem. This would then be terminated into a 9 pin JOYSTICK port. From there, we would check for a signal (which so happened to be the same signal as pulling back on the joystick) to determine an active Carrier Detect.
To make things even more hilarious, when we wanted to test the BBS and couldn't dial in ourselves... whatcha think we did? Yep, connected the joystick and pulled back...If we let go, the app would reset and wait for a new "caller". LOL!!!!
OMG - I have just officially over-geeked myself on this forum.
Crazy what you come up with when your 14yrs old and have no life outside of the computer.
Things have progressed a little in that regard. I am married with 2 kids..
HiJack over. SORRY!