Dave, if I understand you correctly, then if a particular block consisted
of: FF 00 FF (1111,1111 0000,0000 1111,1111) then the track buffer for
that block would be: AA AB FF F5 55 ? (1010,1010,1010,10 11,1111,1111,111
1,0101,0101,0101,0) assuming that this 'block' is from the middle of the
sector. Also, if I understand you correctly, things such as track and
sector header and sync bytes (which are normally ONLY written during a
format operation must also be rewritten each time the AMI accesses a disk
for a write operation. More specifically, the smallest unit of data that
the AMI can access is a track but even that must be completely rewritten
including the normally invisible sync and header information. am I close?