+
+#define PxCTL_IRQ_ENABLE 0x01 /* (W) Peripheral A interrupt (IRQ) enable. */
+ /* One equals enable. Set by the OS but available to the user;
+ reset on powerup. */
+#define PxCTL_BIT1 0x02 /* "Set to zero" */
+#define PxCTL_ADDRESSING 0x04 /* (W) Controls PORTA addressing */
+ /* One equals PORTA register; zero equals direction control register */
+#define PACTL_MOTOR_CONTROL 0x08 /* (W) Peripheral motor control line (turn the cassette on
+ or off; zero equals on) */
+#define PBCTL_PERIPH_CMD_IDENT 0x08 /* Peripheral command identification (serial bus command) */
+#define PxCTL_BIT4 0x10 /* "Set to one" */
+#define PxCTL_BIT5 0x20 /* "Set to one" */
+#define PxCTL_BIT6 0x40 /* "Set to zero" */
+#define PxCTL_IRQ_STATUS 0x80 /* Peripheral interrupt (IRQ) status bit. */
+ /* Set by Peripherals (PORTA / PORTB). Reset by reading PORTA / PORTB*/