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eZ8

™

CPU Core

User Manual

UM012820-0810 TCM Instruction

240

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 01h (00000001b) (testing bit 0 if it is

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

tion operand is 1 and clears the V and S flags:

TCM R3, R7



Object Code: 62 37

If 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 1), the following state-

Mnemonic

Destination,

Source

Code

(Hex) Operand 1 Operand 2 Operand 3

TCM r1, r2 62 {r1, r2} — —

TCM r1, @r2 63 {r1, r2} — —

TCM R1, R2 64 R2 R1 —

TCMR1, @R265R2R1—

TCM R1, IM 66 R1 IM —

TCM @R1, IM 67 R1 IM —

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