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3.4
LOADING THE DISKETTE
To load the diskette, open the door on the front panel of the Model FDD100-5 Disk Drive, insert
the diskette, and close the door. A door interlock mechanism prevents the door from closing if the
diskette is not properly loaded. The door may be closed without a diskette being loaded.
3.5
WRITE PROTECT FEATURE
The diskette is protected from being written on when a Write Protect tab is used. Figure 3-1 shows
an unprotected (Read and Write), and a Write-protected (Read-only) diskette. A photoelectric
sensor detects the presence or absence of a notch in the side of the diskette. When the open notch
is sensed, writing is allowed. When the notch is not sensed (covered with a tab), writing is inhibited,
and a status signal informs the controller that a Write Protect condition exists. Optional modifica-
tion to the disk drive electronics may cause the Write Protect signal to go only to the disk drivel
controller interface which will not inhibit writing on the diskette.
WRITE
PROTECT
_ _ll
TCH
UNPROTECTED
WRITE
PROTECT
I
TAB
'-----------le /
©o
o
WRITE PROTECTED
Figure 3-1. Write Protect Feature
3-2
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