Replying to a message of Rob Hamerling to All:

 RH> I am writing an OS/2 device driver (first attempt!) for a realtime
 RH> application transmitting data to devices via an RS-232 port, mode
 RH> 38400,6,n,1. Output is typically 10 to 20 bytes with a required pause
 RH> between these 'frames' of 0.6 or 1.2 (the transmission time of 3 or 6
 RH> characters), during which the line must be idle (no 'dummy'
 RH> characters allowed).  How do I obtain such short intervals reasonably
 RH> accurate? Note: The timing is needed in interrupt state of the device
 RH> driver and the requesting thread is blocked. Code samples or
 RH> references to exiting sources are appreciated!!.

If you are looking to program a device driver to do it, maybe you should
get in contact with Timur Tabi, he wrote the high resolution timer driver
timer0.sys. You can reach him at   timur{at}io.com, if you have e-mail.
Further more, he is often in the COMP.OS.OS2.PROGRAMMER.* if you have
access to newsgroups, that may be the best way to try to get to him.

 RH>  ! Origin: Root of Downsort, Netherlands [31-347-322423] (2:281/732)

Bye, Erik!
PGPkey available by e-mail/netmail

 *** I am slowly getting there, but Sibyl is getting me there faster :-)
 *** (Sibyl=a devellopment-tool) Q's? e-mail me at ErikH{at}hcc-gron.idn.nl

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