Zilog Z8F0130 - Manual (Page 227)

eZ8
™
CPU Core
User Manual
UM012820-0810 RLC Instruction
212
Attributes
Escaped Mode Addressing
Using Escaped Mode Addressing, address modes R or IR specify a work-
ing register. If the destination address is prefixed by
Eh ( 1110b ), a work-
ing register is inferred. For example, if Working Register R12 ( Ch ) is the
preferred destination operand, use ECh as the destination operand in the
Op Code. To access registers with addresses E0h to EFh , either set the
Working Group Pointer, RP[7:4] , to Eh or use indirect addressing.
Sample Usage
If the Carry flag is reset and Register C6h contains the value 8F
( 10001111b ), the following statement leaves Register C6h with the value
1Eh ( 00011110b ), sets the C and V flags and clears S and Z flags:
RLC C6

Object Code: 10 C6
If the Carry flag is reset, Working Register R4 contains the value C6h , and
Register C6h contains the value 8F ( 10001111b ), the following state-
ment leaves Register C6h with the value 1Eh ( 00011110b ), sets the C
and V flags and clears the S and Z flags:
RLC @R4

Object Code: 11 E4
Mnemonic Destination
Op
Code
(Hex)
Operand 1 Operand 2 Operand 3
RLC R1 10 R1 — —
RLC @R1 11 R1 — —