#define STRV( a )  a, sizeof( a )   // make  vector of an array

/*
 * Constants for i8253 timer
 */
enum {
    i8253CounterZero	= 0x40, // 8253 Counter Zero Register
    i8253CtrlZeroOrTwo	= 0x43, // 8253 Control Byte Register
    i8253CmdReadCtrZero = 0x00, // Latch Command, LSB first, MSB second
    i8253CmdInitCtrZero = 0x34, // Rate generator
};
