fCurrentMarkValue
if (markBits[markOffset] != fCurrentMarkValue) {
markBits[markOffset] = fCurrentMarkValue;
if (markBits[markOffset] != fCurrentMarkValue) {
markBits[markOffset] = fCurrentMarkValue;
if (fCurrentMarkValue == 255)
fCurrentMarkValue = 0;
fCurrentMarkValue++;
uint8 fCurrentMarkValue;