Changes
Z80
,/* Internal state */
| IR (Instruction Register) || 8-bit || Holds the opcode of the currently executing instruction || Internally used, not accessible by the programmer
|-
| IRP EIP (Index Register Extended Instruction Prefix) || 2-bit || Stores the index register prefix for extended instructions (DDCB, FDED, or none) || Indicates the use of index registers (IX or IY) Used for memory accessextended instruction sets like bitwise ops |-| EIP IMP (Extended Instruction Indexing Mode Prefix) || 2-bit || Stores the prefix for extended instructions index register selection (CBDD for IX, EDFD for IY, or none) || Used Indicates use of index registers (IX or IY) for extended instruction sets like bitwise ops and block instructionsmemory access
|}
