cctalk Digest, Vol 70, Issue 3

[Jim Brain]

Tony Duell wrote:
> The point weas that the Smartmodem would work using only the TxD and RxD 
> data lines (it didn't use the control lines, simply because you couldn't 
> rely on them even existing on some RS232 interfaces) _and_ it could not 
> be fooled if the special sequence of characters to go to command mode 
> occured e.g. in a file download. It was assumed (I think quite 
> reasonably) that you'd not get the characters _and the pauses_ in a download.
>   
It was a bear to properly emulate that sequence in tcpser, as many BBS 
systems used it to hang up:

+++
ath0

in lieu of dropping DTR.

I'm not quite sure I have it *exactly* emulated, but it must be close 
enough, as I never get bug reports on that aspect of it anymore.

Jim