BASF 6106 - Page 27

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DISK CHANGE OPTION (FIG. 2-14)
Pin
34 of the interface can be used for the
Disk Change Option when the IN USE option is
not used. The DISK CHANGE-signal notifies
the host system that the Flexy Disk has been
changed even if the drive was deselected. As
soon as the Flexy Disk is unloaded, the speed
detector will deactivate the SPEED-signal and
the DISK CHANGE-FF is set. The DISK CHANGE-
signal is sent to the host system when the
A
SPEED
SPEED/
PWRONRESET/
TNT.SELECT/
A
drive is selected. The DISK CHANGE-FF will stay
set when the new Flexy Disk is loaded. To deactivate
the
DISK CHANGE-signal, the host system must de-
select the drive again. The DISK CHANGE-FF is then
reset (see timing diagram Fig. 2-15). To enable
the
DISK CHANGE option, a jumper is installed at
JJ2 Pins
11 and 12.
READY
JJ3
r----.,
'14 13 '
J---4-- I
1 ,
DISK CHANGE·FF
DISK CHANGE OUT/'12 11 I
TO TIfII:
HOST
SYSTEM
FIGURE 2- 14 DISK CHANGE LOGI C
SELECT I
SPEED
READYI
DISK CHANGE - F F
DISK CHANGE OU T I
MINI
DISK LOADED
UNLOADED RELOADED
FIGURE 2 - 15 TIMING DIAGRAM OrSK CHANGE LOGrC
2 - 11