notes@isucs1.UUCP (10/14/85)
Serial input by way of the IBM-PC and compatible BIOS
_is_ buffered. There is an MSDOS interrupt (I'm not sure
which one offhand) that can return a character from the
buffer, as well as return serial port and buffer status.
Some compilers generate code that periodically reads
characters to see if any flow control characters have been
typed (Turbo Pascal does - use the {$c-} compiler directive
to turn this off), and thereby throw away your buffered
characters, making it seem as if they were lost.
When writing your own interrupt routine be sure to re-enable
the interrupts in the interrupt routine.
UUCP: {okstate|umn-cs}!isucs1!dueland CSNET: dueland@iowa-state
"Don't do anything I wouldn't do" - Hunter S. Thompson