On 07/04/2016 01:43 AM, pete wrote:
Acorn formatter s/w doesn't write the optional "index mark" before the
first sector so some PCs have trouble understanding Acorn disks.
If that's a problem on a PC (today it rarely is, but it was in the days
before the "A" revision of the 8272/765 came out, it's a simple matter
to simply block the index signal off the drive cable--it's not needed
for sector reads.
--Chuck