On 28/11/2008 14:13, Curtis H. Wilbar Jr. wrote:
Mine has 6 jumpers, not a grid, and they are :
H HO
OP
LHI
HHI
D1
D0
Aha -- that first one is HHO. It controls whether the drive outputs a
density signal according to what its hole sensor detects. LHI and HHI
are are pair that you set according to whether you want to input an
active-high or active-low density select from the controller (usually
you don't). OP is normally shorted on a PC, but I can't remember what
exactly it does (something to do with disk changed, IIRC).
On the Sony one, the bottom side has silscreened for
one jumper S0/S1
and the Other 3/3M. So one is drive0/drive1, but what is the other ?
S0/S1 is the drive select (DS) or DS1). I expect the other jumper set
may be to do with the density, and whether it determines that from the
holes in the disk ("Auto") or by a signal from the controller ("AT").
--
Pete Peter Turnbull
Network Manager
University of York