Zilog Z8F0130 Manual de usuario descargar pdf (Pagina 199)

eZ8

™

CPU Core

User Manual

UM012820-0810 LDX Instruction

184

If Working Register R1 contains the value B3h, and Register 702h con-

tains the value

46h, the following statement loads the value 46h into Reg-

ister

B3h:

LDX @R1, 702h

Object Code: 85 17 02

The contents of Working Register R1 and Register 702h are not affected.

If Register Pair (

22h, 23h) contains the value 0655h, and Register

0655h contains the value 1Ch, the following statement loads the value

1Ch into Register 96h:

LDX 96h, @22h

Object Code: 86 22 96

The contents of Register Pair (22h, 23h) and Register 0655h are not

affected.

If Register

20h contains the value 28h, and Register Pair (F2h, F3h)

contains the value

0167h, and Register 0167h contains the value 9Bh,

the following statement loads the value

9Bh into Register 28h:

LDX @20h, @.ER(F2h)

Object Code: 87 F2 20

The contents of Register 20h, Register Pair (F2h, F3h), and Register

0167h 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 Working Register Pair

RR10 contains the value 0529h, and Register

0530h (0529h + 07h = 0530h) contains the value C1h, the following

statement loads the value

C1h into Working Register R1:

LDX R1, 7(RR10)

Object Code: 88 1A 07

Note:

1 2 ... 194 195 196 197 198 199 200 201 202 203 204 ... 313 314

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