assembler and serial ports

Article View: comp.os.msdos.programmer

Article #1122

Back to comp.os.msdos.programmer Previous Next

#1122

From: Homer Smith
Date: Sat, 22 Aug 1992 22:17

17 lines
1073 bytes

     Is there a proper group to address assembler problems too?
If so I would be happy to address these there.
 
     I am playing with INT 14, the serial port bios routines.
 
     Function 1 is supposed to write to the port and function
2 is supposed to read from the port.  
 
     I have my serial COM2 hooked upto a dumb terminal, and
I can read from it just fine, plus or minus my total non understanding
of what I am doing, but I can't get anything I write to it to appear.
Instead I get a timeout return in the AH register.
 
     What is the timeout for?  How do I get it to write the character
I send?
 
     Thanks,  Homer

Technical Details

Message-ID: <1992Aug22.221721.17544@tc.cornell.edu>

Path: arc1-ca.pugleaf.net!sparky!uunet!elroy.jpl.nasa.gov!usc!rpi!batcomputer!theory.TC.Cornell.EDU!homer

Show Full Headers

Complete Article Headers

Newsgroups: comp.os.msdos.programmer
Path: arc1-ca.pugleaf.net!sparky!uunet!elroy.jpl.nasa.gov!usc!rpi!batcomputer!theory.TC.Cornell.EDU!homer
From: homer@theory.TC.Cornell.EDU (Homer Smith)
Subject: assembler and serial ports
Message-ID: <1992Aug22.221721.17544@tc.cornell.edu>
Sender: news@tc.cornell.edu
Nntp-Posting-Host: theory.tc.cornell.edu
Organization: Cornell Theory Center
Date: Sat, 22 Aug 1992 22:17:21 GMT
Lines: 19