Strange Teledisk question

[Fred Cisin]

What kind of drives does the Waveterm use?

What kind of disk controller?


For example:
96tpi (80 tracks per side) drives can read 48tpi (40 tracks per side) 
disks, and can write them to virgin disks, but, when RE-writing them, 
leave part of the old (wide) track alongside.  Those RE-written disks are 
readable by a 96tpi drive, but not necessarily by a 48tpi drive.


PC is NEC-style FDC.

WD-style disk controllers (such as 179x) can handle post index gap smaller 
than NEC-style can.  For reading with NEC controllers, that can often be 
handled by masking the index pulse.

WD-style controllers can read sectors that have a WRONG number in the side 
number field, but NEC can't ignore that field.  The good news there is 
on formats that use a wrong number in the side number field (such as 
Kaypro DS), the WD controller doesn't MIND if it encounters the correct 
number in that field.

SOME NEC-style FDCs can not handle 128 bytes per sector.  Some can.


The FDADAP adapter's primary difference between a simple cable is support 
of TG43, a signal to indicate that it is on an inner track, for 
write-precompensation, etc.