Zilog Z8F0130 Bedienungsanleitung PDF herunterladen (Seite 89)

100

101

eZ8

™

CPU Core

User Manual

UM012820-0810 ADC Instruction

Attributes

Escaped Mode Addressing

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

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

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

ister R12 (Ch) is the preferred destination operand, use ECh as the destina-

tion 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

Example 1

If Working Register R3 contains the value 16h, the Carry flag is 1, and

Working Register R11 contains the value

20h, the following statement

leaves the value

37h in Working Register R3 and clears the C, Z, S, V, D,

and H flags:

ADC R3, R11



Object Code: 12 3B

Mnemonic

Destination,

Source

Code

(Hex) Operand 1 Operand 2 Operand 3

ADC r1, r2 12 {r1, r2} — —

ADC r1, @r2 13 {r1, r2} — —

ADC R1, R2 14 R2 R1 —

ADCR1, @R215R2R1—

ADC R1, IM 16 R1 IM —

ADC @R1, IM 17 R1 IM —

1 2 ... 84 85 86 87 88 89 90 91 92 93 94 ... 313 314

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