FAT12_MASK
#define FAT12(pmp) (pmp->pm_fatmask == FAT12_MASK)
case FAT12_MASK:
case FAT12_MASK:
case FAT12_MASK:
fatVolume->pm_fatmask = FAT12_MASK;
if (fatVolume->pm_maxcluster <= ((CLUST_RSRVD - CLUST_FIRST) & FAT12_MASK)) {
dummyVolume.pm_fatmask = FAT12_MASK;