TIP: Click on subject to list as thread! ANSI
echo: 80xxx
to: JAMES VAHN
from: SCOTT MCNAY
date: 1998-04-05 00:30:00
subject: Serial port: BIOS function

 *** James Vahn wrote in a message to Fernando Ariel Gont:
> 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.
Because the BIOS routines are not interrupt-driven, therefore anything over 
approximately 1200 bps (2400 if you're lucky, 300 if you're unlucky), will 
have lots of dropouts.
--Scott.
--- timEd 1.01
---------------
* Origin: Wizard's BBS, 254-554-2146, Pager=616-3609 (1:395/11)

SOURCE: echomail via exec-pc

Email questions or comments to sysop@ipingthereforeiam.com
All parts of this website painstakingly hand-crafted in the U.S.A.!
IPTIA BBS/MUD/Terminal/Game Server List, © 2025 IPTIA Consulting™.