UART Assembly Programming

[cyeokpeng]

Hi,

 

I am now doing a project to write a 16-bit DOS piano program to play the 12 notes in an octave, which I have completed. But this program must also be able to "talk" to another computer through null modem R2-232 connection so that the note played on the local PC is also played on the terminal PC.

 

I have a severe problem accessing the COM1 port on the Window XP platform, due to protected rights of accessing the I/O ports in Windows NT and higher operating systems, even when I am using the 16-bit DOS emulator program NTVDM.exe. Is there any quick solution to this problem, how am I going to bypass the Privilege level access of I/O ports (COM1 port) with my written software program? (For example, adding a few assembly codes? How?)

 

Thanks

[meL]

forthsoft.com

 

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[KFC]

This Will Help:

http://webster.cs.ucr.edu/Page_win32/WindowsAsmPgm/html/WinAsmPgm.html