JD>   When a port is "locked", the BPS rate cannot be changed by an
JD>   application program.

    Okay, then how does an application program change the BPS rate?

JD>   If an application can change the BPS rate of a serial device, then the
JD>   device is not, by definition, "locked".

    Does it have to "unlock" it first, and then
"relock" it?  I haven't seen 
anything the IOCtl functions for locking and unlocking.

JD>   Your parameter packet is wrong.  The parameter packet comprises two
JD>   fields, a rate field and a fraction field, as described in the on-line
JD>   reference for DosDevIOCtl.

    I know it is.  That was my first attempt.  I've since revised it quite a 
bit. :)


C. Gaefke
cdgaefke{at}sgi.net
[CDRMAIL Author]

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