ZiLOG eZ8 User Manual page 80

BIT
Bit Set/Reset
BIT p, bit, dst
Operation
Description
Flags
Attributes
Mnemonic
BIT
Example
UM012811-0904
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←
dst[bit] p
The selected bit in the destination operand is the binary value p (0 or 1). All other bits are
unaffected.
C Unaffected.
Z Set if the result is zero; reset otherwise.
S Set if the result is negative; reset otherwise.
V Reset to 0.
D Unaffected.
H Unaffected.
Polarity, Bit,
Destination Opcode (Hex)
p, bit, r1 E2
•
If Working Register R7 contains the value
BIT 0, 4, R7
Object Code: E2 47
leaves the value (00101000B) in Working Register R7 and clears the V flag.
28H
•
If Working Register R7 contains the value
BIT 1, 2, R7
Object Code: E2 A7
leaves the value (00111010B) in Working Register R7 and clears the V flag.
3AH
Operand 1 Operand 2
{p, bit, r1} —
(00111000B), the statement:
38H
(00111000B), the statement:
38H
eZ8 CPU Instruction Set Description
eZ8 CPU
User Manual
70
Operand 3
—