🚀 go-pugleaf

I am attempting to write a TSR that traps both Ctrl-C and Ctrl-Break.

The Ctrl-Break section works very well (this involved writing new
interrupt $1b and $23 handlers that just iret).

I can also detect when Ctrl-C is pressed with a new interrupt $16 handler 
(When it is detected, I just call the old $16 handler again - but only
if function 0 or $10 was called to get a key).

The problem is that if after pressing Ctrl-C, the user types a letter (may
in fact work with any key), either that key disappears (is swallowed up) or
a Ctrl-C appears. I do not know why this is happening.

I have tried several solutions.
- forcing my interrupt $1b and $23 handlers to zero the MSB of the byte at
$0040:$0071 (which is used to flag if Ctrl-Break is pressed)
- when a Ctrl-C is detected, overwriting that word in the keyboard buffer
with a dummy value (the letter A).

Neither of these has worked.

Perhaps I should always reset the byte at $0040:$0071 ????


Any help would be greatly appreciated


Simon Carter
--
-[Simon Carter]-----+-Email: vort@yoyo.cc.monash.edu.au ----------------
2nd Year BCSE       | @mail: 14 Canterbury Rd,Heathmont,VIC 3135,AUST 
Monash Uni, Clayton | Manager:Crystal Software  Product:Crystal Menu 
--------------------+ "Sure my program works - it just doesn't compile!"