Zilog Z8F0130 - Manual (Page 171)

eZ8
™
CPU Core
User Manual
UM012820-0810 JP Instruction
156
Attributes
2
Escaped Mode Addressing
Using Escaped Mode Addressing, address mode RR can specify a work-
ing register Pair. If the high nibble of the source or destination address is
Eh ( 1110b ), a Working Register Pair is inferred. For example, if Working
Register Pair R12 and R13 (with base address Ch ) is the preferred destina-
tion operand, use ECh as the destination operand in the Op Code. To
access Register Pairs with addresses E0h to EFh , either set the Working
Group Pointer, RP[7:4] , to Eh or use indirect addressing.
Sample Usage
If Working Register Pair RR2 contains the value 3F45h , the following
statement replaces the contents of the PC with the value 3F45h and trans-
fers program control to that location.
JP @RR2

Object Code: C4 E2
2. The location of the JP IRR1 instruction is moved from its former Z8 CPU Op Code location at
30h .
Mnemonic Destination
Op
Code
(Hex)
Operand 1 Operand 2 Operand 3
JP DA 8D DA[15:8] DA[7:0] —
JP IRR1 C4 RR1 — —