Zilog Z8F0130 Manual do Utilizador descarregar pdf (Página 102)

eZ8

™

CPU Core

User Manual

UM012820-0810 AND Instruction

Attributes

Escaped Mode Addressing

Using Escaped Mode Addressing, address modes R or IR specify a work-

ing register. If the high nibble of the source or destination address is Eh

(

1110b), a working 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 Working Register R1 contains the value 38h (00111000b) and Work-

ing Register R14 contains the value 8Dh (10001101b), the following

statement leaves the value

08h (00001000b) in Working Register R1 and

clears the Z, V, and S flags:

AND R1, R14



Object Code: 52 1E

If Working Register R4 contains the value F9h (11111001b), Working

7Bh, and Register 7Bh contains the value

6Ah (01101010b), the following statement leaves the value 68h

(

01101000b) in Working Register R4 and clears the Z, V, and S flags:

Mnemonic

Destination,

Source

Code

(Hex) Operand 1 Operand 2 Operand 3

AND r1, r2 52 {r1, r2} — —

AND r1, @r2 53 {r1, r2} — —

AND R1, R2 54 R2 R1 —

ANDR1, @R255R2R1—

AND R1, IM 56 R1 IM —

AND @R1, IM 57 R1 IM —

1 2 ... 97 98 99 100 101 102 103 104 105 106 107 ... 313 314

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