Zilog Z8F0130 Manual do Utilizador descarregar pdf (Página 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

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

Code

(Hex) Operand 1 Operand 2 Operand 3

RLC R1 10 R1 — —

RLC @R1 11 R1 — —

1 2 ... 222 223 224 225 226 227 228 229 230 231 232 ... 313 314

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