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6

A partly speculative answer, working backwards from the source code of Marat Fayzulin's ColEm, it appears to be a fixed-size sector dump. On line 52 of EMULib/FDIDisk.c you can see confirmation of the geometry you already know about: single sided; 40 tracks; 8 sectors per track; 512-byte sectors. Line 406 lists FMT_ADMDSK (i.e. Adam disk) amongst those ...


7

I don't know the MicroBee, but grew up with CP/M 2.2 and 3.0 and its variety of floppy disk formats. There were two different ways of implementing skew in use: assigning the low-level sector IDs in a non-contiguous order, and simply access sectors by a 1:1 mapping from their logical number, resulting in sector ID sequences like 0 3 6 9 2 5 8 1 4 7, ...


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