Description of saved data on the HDD ------------------------------------ It isnīt necessary to have partition with MDOS3 (49h), just only non-fragment data somewhere on the disc (best at the beginning) following this structure: 512 bytes (= 1 sector): infosector (description see lower) 866 304 bytes (1692 sectors): content MDOS disc at the format 94x9x2 this is one virtual disc and these data can be repeated up to disc (partition) space. Like this: infosector+data+infosector+data+infosector+data+infosector+data+ ..etc Description of the infosector OFFSET (decimal) content description 0-3 DOS mark (text: SDOS) 4-35 32 characters for disc description 36 write-protect ("0"=R/W, "1"= read only) 37-511 free explanations: 1/ DOS mark is just for control, but itīs necessary. Itīs capital letters "SDOS" like in the BOOT on the MDOS disc 2/ disc description - 32 characters are fit into one screen line (+ write-protect info) 3/ write-protect info - is saved on the disc, because itīs better. Take care, this byte has NOT value 0 or 1, but here is saved character "0" (0x30H) or "1" (0x31H)