Thread: partnumber in DSKIMG header on original img files

Solved the puzzle, it was fun

partnumber in DSKIMG header
start 30h
length 9 bytes

Code:

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-reverse byte order [little endian conversion]
-nibble together 12 bits
example: GH + upper 4bits from EF = GHE
-split into 2 bytes, using upper and lower 6bit
example: 410h = 10h and 10h
-add 20h [jump 32 places in the ascii table]
-convert byte to char [20h - 5Fh, the first 64 printable chars]
-string = 12 char
-2 types of strings
"006/010" type, displays last 8 char of string
"D" type without "-" in string, displays first 7 char of string [need to test more to define format]

See test+PDF-DISKIMG.rar for testing your software

Maybe this is added to GMapTool or some other tool.