EIA flow control on DMF32? (11/750, 4.3)

[Malcolm L. Carlock]

According to DMF(4), the first two ports of a dmf device have "full modem
control".  On our 11/750, which has a DMF32 sitting on uba1, I find that all
ports on this device correctly recognize a dropped carrier (loss of DCD), but
NONE of them respond to EIA flow control, i.e., the modem asserts zero on its
CTS line (pin 4), but the Vax takes no notice and keeps transmitting without
interruption.  Toggling pin 6 (DSR) doesn't seem to have any effect either.

I'd like to be able to enable EIA flow control on at least a couple of
these ports (the Sperry 7000 "Tahoe" here (for instance), running 4.3,
understands EIA flow control on all tty ports.)

The manual entries for tty(4), gettyab(5), and printcap(5) don't seem to
mention any parameters that would govern EIA flow control.

Anyone know whether it's possible to get EIA flow control working on this
machine, and if so, how it might be accomplished?

Thanks in advance,




Malcolm L. Carlock              Internet:  malc at unrvax.unr.edu
                                UUCP:      uunet!unrvax!malc