Zilog Z8F0130 Manual do Utilizador descarregar pdf (Página 205)

100

101

eZ8

™

CPU Core

User Manual

UM012820-0810 MULT Instruction

190

Escaped Mode Addressing

Using Escaped Mode Addressing, address mode RR can specify a work-

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

Eh (1110b), a working register Pair is inferred. For example, if Working

Ch) is the preferred destina-

tion operand, use ECh as the destination operand in the Op Code. To

access Register Pairs with addresses

E0h to EFh, either set the Working

Group Pointer,

RP[7:4], to Eh or use indirect addressing.

Sample Usage

Using Escaped Mode Addressing, if Working Register R4 contains the

value

86h and Working Register R5 contains the value 53h, the following

statement provides a result of

2B72h, stores the most significant byte of

the result (

2Bh) in Working Register R4 and stores the least significant

byte of the result (

72h) in Working Register R5:

MULT E4h



Object Code: F4 E4

The flags are unaffected.

1 2 ... 200 201 202 203 204 205 206 207 208 209 210 ... 313 314

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