John,
That is a very wide selection of images for the Model(s) 1, 3, 4, & 4P, with a multitude of Operating
Systems {Newdos, Ultrados, TRSDOS (1.3, 2.7, 6.2}, LDOS, and CP/M}.
Do you have a specific .DSK image for s specific Model we can start with? I've conjured up a list of FF definitions
that are for the TRS-80 CP/M systems which should help for CP/M Images. The other OS Definitions shouldn't be
too hard to define.
LDOS 631 appears to have these settings for SS/DD .RAW (Sector Dump) = .IMG
LDOS 6.3.1 SS/DD 40 Track 18 Sectors of 256 Bytes = 184320 bytes
[ldos]
cyls = 40
heads = 1
secs = 18
interleave = 2
bps = 256
id = 0
#rpm = 360
rpm = 300
rate = 250
mode = mfm
iam = no
Larry