 The format used in Microsoft "Standalone Disk BASIC's" 8-bit file system precursor was not supported by QDOS.By August 1980, QDOS had been renamed 86-DOS.Starting with 86-DOS 0.42, the size and layout of directory entries was changed from 16 bytes to 32 bytes in order to add a file date stamp and increase the theoretical file size limit beyond the previous limit of 16 MB.