F8E0h - Indirect Data Register
F8E1h - General Purpose I/O Data Register (0=Low, 1=High) F8E2h - Interrupt Pending Register B (write 0=clear, 1=unchanged) ;\ F8E3h - Interrupt Pending Register A (write 0=clear, 1=unchanged) ; F8E4h - Interrupt in-Service Register B ; not used F8E5h - Interrupt in-Service Register A ; F8E6h - Interrupt Mask Register B (0=masked, 1=unmasked) ; F8E7h - Interrupt Mask Register A (0=masked, 1=unmasked) ;/
F8E8h - Indirect Index and Interrupt Vector Register
F8E9h - Timers A and B Control Register ;\ F8EAh - Timer B Data Register ; not used F8EBh - Timer A Data Register ;/
F8ECh - USART Control Register
F8EDh - Receiver Status Register
F8EFh - USART Data Register
Aside from the above 16 directly addressable registers, there are 8 indirectly addressable ones. For details on the direct & indirect registers, see [[Z80-STI]].
== Software ==