mpu401debug        65 dev/isa/mpu401.c #define DPRINTF(x)	if (mpu401debug) printf x
mpu401debug        66 dev/isa/mpu401.c #define DPRINTFN(n,x)	if (mpu401debug >= (n)) printf x
mpu401debug        67 dev/isa/mpu401.c int	mpu401debug = 0;