Zilog Z8F0130 Instrukcja Użytkownika Pobierz pdf (Strona 231)

eZ8

™

CPU Core

User Manual

UM012820-0810 RRC Instruction

216

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 Register C6h contains the value DDh (11011101b) and the Carry flag is

reset, the following statement leaves the value

6Eh (01101110b) in Reg-

ister C6h, sets the C and V flags and clears the Z and S flags:

RRC

C6h

Object Code: C0 C6

If Register 2Ch contains the value EDh, Register EDh contains the value

00h (00000000b) and the Carry flag is reset, the following statement

leaves the value

00h (00000000b) in Register EDh and resets the C, Z, S,

and V flags:

RRC @

2Ch

Object Code: C1 2C

Mnemonic Destination

Code

(Hex) Operand 1 Operand 2 Operand 3

RRC R1 C0 R1 — —

RRC @R1 C1 R1 — —

1 2 ... 226 227 228 229 230 231 232 233 234 235 236 ... 313 314

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