Its a not yet implemented feature. To do ext2emu you need more details than
decoding the sector. You need the length and contents of the various
gaps. I try to get it accurate which takes time. In reality the
controllers in general aren't that pickey so it only has to be sort of
You can add it yourself but its pretty low level stuff. In mfm/inc/mfm_decoder
You need to modify mfm_controller_info entry WD_1006 to CONT_MODEL and add
the sector size, number of sectors, CRC info etc. Compare it to one of the
existing CONT_MODEL. Probably Intel_iSBC_214_512B. When you get that working
for decoding after updating you then need to change the null to a trk_
trk_ISBC214_512b is probably a good starting point. Some of the differences
between your modified WD_1006 and the Intel_iSBC_214_512B may require
changes to the trk_ data. This is likely to work but your controller may
not like the Intel format.
I won't have time to take a look at this until late in the month.