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dm diff

'dm diff' will compare two block-based disk images (e.g. a .d81 is block-based, while a .t64 is not) at a byte-by-byte level and report on differences. You can use 'dm diff --help' for a list of options to this command.

Features

  • brief or detailed (-v) output
  • optional BAM visualization display
  • also reports on differences in error codes, if any

Examples

Show a detailed summary of the differences between a d64 and a g64 (note that the g64 is interpreted as if it were converted to a d64 first!).

dm diff disk.d64 disk.g64 -v

Show the differences between the two disk images using a BAM visualization in addition to a brief summary; also include a legend explaining the BAM symbols:

dm diff disk1.d64 disk2.d64 --bam --legend