User manual

Error messages
MS-DOS critical errors
Error code Meaning
0 Attempt to write on write-protected disk
1 Unknown unit
2 Drive not ready
3 Unknown command
4 CRC data error
5 Invalid call structure
6 SEEK error with disks
7 Unknown data medium
8 Sector not found
9 Printer paper end
AWriteerror
BReaderror
C General error
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