On Sep 13 13:52 96, Charles Yendle of 3:711/948 wrote:

CY> In a message to Charles Yendle  David Drummond wrote:

>> Charles, at 12:57 on Sep 08 1996, you wrote to Geoff Green ...
>>
>> . . .[chomp]. . .
>>
>> CY> My Friend has a 14400 Baud (DTE Thruput) Modem
>>
>> Are you suggesting that your friend sets his/her comm port speed to
>> 14,400? on a PC? - I'd like to see that!

CY> Besides the fact that a PC Uart DOES support a port speed of 14400 BPS (But 
CY> most software doesn't).

It doesn't.  The available clock rate divisors do NOT include 14400. 
Direct hardware design limitation.

This was the original culture shock point for folk who had never tried port
speed locking before.  No speed lock meant no connect with a 14400.  Matter
of fact, one brilliant Netcomm model even attempted to set _its_ serial
rate to 14400 if you didn't lock it - and there was no way to communicate
with it thereafter without powering it down, or resetting it by DTR if
you'd had the foresight to program it for DTR reset.

Reference any of 8250, 16450, 16550 data sheets.

CY> Why would I need to set the com port to 14400 to achecive 14400 BPS 
CY> Thruput.

You don't.  You set it to MORE than that, and use handshaking to make the
PC wait for the modem.

Charles - could you please do us a favour and cease attempting to inform?

It's not helping the kids in here for dammn - your best batting average is
running between mediocre and gastly.

Regards,
Dave Hatch.

--- Msgedsq 3.20