Zilog Z8F0130 Manual do Utilizador descarregar pdf (Página 201)

100

101

eZ8

™

CPU Core

User Manual

UM012820-0810 LDX Instruction

186

If Register Pair (20h, 21h) contains the value 0456h, and Register F2h

contains the value

BBh, and Register BBh contains the value 5Fh, the fol-

lowing statement loads the value

5Fh into Register 0456h:

LDX @.ER(20h), @F2h

Object Code: 97 F2 20

The contents of Register Pair (20h, 21h), Register F2h, and Register

BBh are not affected.

The

.ER notation is used in this case to resolve the ambiguity that

would otherwise be present as to which operand (

20h or F2h) is to be

treated as a Register Pair.

If Register

29Ch contains the value 22h, the following statement loads

the value

22h into Register 702h:

LDX 702h, 29Ch

Object Code: E8 29

C7 02

The contents of Register

29Ch are not affected.

The following statement loads the value

56h into Register 703h:

LDX 703h, #56h

Object Code: E9 56 07 03

Note:

1 2 ... 196 197 198 199 200 201 202 203 204 205 206 ... 313 314

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