code: function AND() {
  		var value = read();
  		if ( value === 4 ) {
  			value = value;
  		}
  		writeA( A & value );
  		flagN = ( A & 0x80 ) && 1;
  		flagZ = +( A === 0 );
  	}
docs: Bitwise AND.
  Opcodes: 0x29, 0x25, 0x35, 0x2d, 0x3d, 0x39, 0x21, 0x31