ZiLOG Z80380 User Manual page 64

Z
ILOG
BTEST
BANK TEST
BTEST
← SR(16)
Operation: S
← SR(24)
Z
← SR(0)
V
← SR(8)
C
The Alternate Register bits in the Select Register (SR) are transferred to the flags. This allows
the program to determine the state of the machine.
S: Set if the alternate bank IX is in use; cleared otherwise
Flags:
Z: Set if the alternate bank IY is in use; cleared otherwise
H: Unaffected
V: Set if the alternate bank AF is in use; cleared otherwise
N: Unaffected
C: Set if the alternate bank of BC, DE and HL is in use; cleared otherwise
Addressing
Mode Syntax
BTEST
5-30
Instruction Format
11101101 11001111
Execute
Time Note
2
DC-8297-03
Z380 ™
U ' M
SER S ANUAL