
5-105
Z380
™
USER'S MANUAL
ZILOG
DC-8297-03
MTEST
MODE TEST
MTEST
Operation: S ← SR(7)
Z ← SR(6)
C ← SR(1)
The three mode control bits in the Select Register (SR) are transferred to the flags. This
allows the program to determine the state of the machine.
Flags: S: Set if Extended mode is in effect; cleared otherwise
Z: Set if Long word mode is in effect; cleared otherwise
H: Unaffected
V: Unaffected
N: Unaffected
C: Set if Lock mode is in effect; cleared otherwise
Addressing Execute
Mode Syntax Instruction Format Time Note
MTEST 11011101 11001111 2
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