Hello!
You don't know the trick with passing -1L for querying the original pointer value?LOL I was talking about SetVec (or what's the function name for setting up new system vector), not Setexc (executing a subroutine in supervisor mode). I haven't seen GEMDOS/BIOS/XBIOS documentation for years...
No, you are right. I spoken about the wrong function. Supexec() is the one that execute a function in supervisormode, not Setexc().
Ciao ...Frank -- ATARI FALCON 040 // MILAN 060 ----------------------------------------- http://www.cs.uni-magdeburg.de/~fnaumann/ e-Mail: fnaumann@freemint.de