Zilog Z8F0130 - Manual (Page 102)

eZ8
™
CPU Core
User Manual
UM012820-0810 AND Instruction
87
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
Register R13 contains the value 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
Op
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 —
AND R1, @R2 55 R2 R1 —
AND R1, IM 56 R1 IM —
AND @R1, IM 57 R1 IM —