Can't send register value to port 0x43

[Heinz_]

Hi, with assembler code embedded in my c++ code i'm trying to send a value to I/O port 0x43 (8254 timer control) but the program crashes at this point, i'm using digital mars c++ compiler wich has an inline assembler, also tried mingw and it's worst (it doesn't even compile), here are the asm lines: asm { mov AL, 0xB6; out 0x43, AL; // It crashes in this line. mov AL, 54; out 0x42, AL; mov AL, 124 out 0x42, AL; in AL, 0x61; or AL, 0x3; out 0x61, AL; in AL, 0x61; and AL, 0xFC; out 0x42, AL; } I've also tried embedding this code into other languages like D, but it throws a win32 exception. What's wrong man? thx