Zilog Z8F0130 - Manual (Page 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
Register R5 contains the value CBh , and Register CBh contains the value
88h ( 10001000b ) (testing bits 7 and 3 if they are 0), the following state-
Mnemonic
Destination,
Source
Op
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 —
TM R1, @R2 75 R2 R1 —
TM R1, IM 76 R1 IM —
TM @R1, IM 77 R1 IM —