Zilog Z8F0130 Manual de usuario descargar pdf (Pagina 260)

eZ8

™

CPU Core

User Manual

UM012820-0810 TM Instruction

245

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 R3 contains the value 45h (01000101b) and Work-

ing Register R7 contains the value 02h (00000010b) (testing bit 1 if it is

0), the following statement sets the Z flag (indicating bit 1 in the destina

tion operand is 0), and clears the V and S flags:

TM R3, R7



Object Code: 72 37

Working Register R14 contains the value F3h (11110011b), Working

CBh, and Register CBh contains the value

88h (10001000b) (testing bits 7 and 3 if they are 0), the following state-

Mnemonic

Destination,

Source

Code

(Hex) Operand 1 Operand 2 Operand 3

TM r1, r2 72 {r1, r2} — —

TM r1, @r2 73 {r1, r2} — —

TM R1, R2 74 R2 R1 —

TMR1, @R275R2R1—

TM R1, IM 76 R1 IM —

TM @R1, IM 77 R1 IM —

1 2 ... 255 256 257 258 259 260 261 262 263 264 265 ... 313 314

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Zilog Z8F0130 Manual de usuario Pagina 260