4 Jun
2009
4 Jun
'09
7:44 p.m.
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