How to detect AGA chipset installed from C?

[earok]

As above, I just wanted to write a simple command line app that returns a warning if the AGA chipset is installed.

Thanks in advance.

[Minuous]

There is already http://aminet.net/package/util/misc/CheckAGA

[alkis]

With info from here: http://eab.abime.net/showpost.php?p=934516&postcount=10

#include <stdio.h>

int isAga(void) {
  short int *vposr = 0xdff004;

  return *vposr & (1<<9);
}

int main(int argc, char **argv) {
  printf("Aga is %s\n", isAga() ? "true":"false");
  return 0;
}

This seems to work (tested on a500+ and a1200 in emulator)

[earok]

Thanks guys I appreciate it