• Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint
Share this Page URL
Help

Chapter 13. The MS-DOS Environment Under... > Configuring Serial Communications wi...

Configuring Serial Communications with MS-DOS

The NTVDM environment tries to make the computer's COM ports available to MS-DOS programs through a bag of virtual hardware tricks. NTVDM captures attempts by the DOS program to issue instructions to the serial port's hardware and, from the pattern of commands, determines what the program is trying to do. It then performs these actions through the Windows programming interface.

DOS-based serial communication software used direct hardware control and interrupt drivers that received information directly from the hardware when information was arrived from the modem or other remote serial device. NTVDM simulates these hardware interrupts fairly successfully. Most DOS-based serial communications programs will work under Windows XP, although some won't.


PREVIEW

                                                                          

Not a subscriber?

Start A Free Trial


  
  • Creative Edge
  • Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint