btst
Sizes
byte, long
Affected Flags
X
N
Z
V
C
-
-
✱
-
-
Operands
Op 1
Dn/Im
Op 2
Dn/(An)/d(An)/d(An,Xn)/Ea/<label>/d(PC)/d(PC,Xn)/Im
Tests the bit of the second operand at the position of the value of the first operand, it changes the Z (zero) flag, the destination operand is not modified