🚀 go-pugleaf

In article <1992Aug25.184207.7825@lclark.edu>, harrison@sun.lclark.edu (Mark Harrison) writes:
> 
> Hi.  I am reading ALT+<key> from the keyboard with bioskey (in TC++ 3.0.)
> But that gives me values that map to the physical layout of the keyboard. 
> Is there an easy way to translate this value into one that will tell me
> the Ascii code of the key?  For instance, how do I transform 0x3100
> (ALT+N) to get the ascii code of N?  Will I need to write a function that
> will do this for all the ALT values I want to check for?  If so, then no
> problem.  I just don't want to reinvent any wheels.
> 
The easiest way is to look at the keyboard status flags right after obtaining
a character from the keyboard. You can obtain them via interrupt 16, function 2.
This call returns the contents of 40:17 in AL. Bit 3 (mask 0x80) is set if an
ALT key is depressed. So:

   if (kbhit()) {
      ch = getch();
      _AH = 2;
      __emit__(0xcd, 0x16);
      if (_AL & 0x08)
         ALT was down
      }

Gery Dueck
dueck@brandonu.ca