Changes
Z80
,/* Internal state */
IFF2 stores the previous state of IFF1 so that after the NMI is handled, IFF1 can be restored to its original state.
NMI is known to be used by the [[PlayCity]] and [[Play2CPC]] expansions.
|-
| WZ || 16-bit || Internal temporary register pair. Also known as MEMPTR || Used for memory and address calculations.
