Hullo James Vahn, hope you are having a nice day!!
04-Apr-98 07:29:15, James Vahn wrote to Fernando Ariel Gont
          Subject: Re: Serial port: BIOS function
 >> I tried to use int 14h func 02h: Receive character from
 >> communications port. The "specification" says: "This function waits
 >> for a character", But in the few "experiments" I made, it seems
 >> that it doesn't _*wait*_ the character....
 JV> Best to use int 14 just to setup the ports, but deal with
 JV> reading/writing them directly. Can't remember exactly why,
 JV> something to do with speed and timings I think.
Yes, I was going to program the 8250 at low level, but I simply wanted to
test the port, so that I used the int 14h functions... Well, really, I
tried, but didn't success! :)
Yes, it's a matter of speed... The BIOS lets you use the COM port up to
9600 bits per second, but if you program the 8250 chip directly, you can
use it up to 56k.... (I'm not sure if I have read that it can be used up to
115K...)....
 -=> Yours sincerely, Fernando Ariel Gont <=-
e-mail: FGont@siscor.bibnal.edu.ar
e-mail "Good Stuff!" _*Magazine*_ : gstuff@siscor.bibnal.edu.ar
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