Zilog Z80380 - Manual (Page 64)

5-30
Z380 ™
U SER ' S M ANUAL
DC-8297-03
Z ILOG
BTEST
BANK TEST
BTEST
Operation: S
←
SR(16)
Z
←
SR(24)
V
←
SR(0)
C
←
SR(8)
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.
Flags: S: Set if the alternate bank IX is in use; cleared otherwise
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 Execute
Mode Syntax Instruction Format Time Note
BTEST 11101101 11001111 2