Write Protect Jumper (Pr); File Unsafe Jumper (Fr); Door Lock Jumpers (Dl, Dr, Dh); Dr Jumper - NEC FD1165 Maintenance Manual

2.8.4 Write Protect Jumper (PR)
If the flexible d
is~
has a wr i te protect notch and jumper
position PRI is selected, the disk drive sends a write pro-
tect signal to the controller and inhibits recording on the
disk. If jumper position PR2 is selected, the disk drive
sends the wr ite protect signal to the controller but re-
cording on the disk is permitted. The disk drive is sup-
plied with PRI selected.
2.8.5 File Unsafe Jumper (FR)
Jumper position FRI disables the File Unsafe function.
Jumper position FR2 enables the File Unsafe function. The
disk drive is supplied with FR2 selected.
2.8.6 Door Lock Jumpers (DL, DR, DH)
The Model FDl165 has three door lock jumpers which are used
in different combinations with the In Use signal to deter-
mine the door lock condition. This section describes the
functions of the door lock jumpers.
2.8.6.1 DR Jumper
When DRI is sel,ected, the Ready signal from the con troller
enables the door lock function (see Table 2-4). When DR2
is selected, the door locks function is independent of the
Ready signal. The disk drive is supplied with DRI selected.
2.8.6.2 DL Jumper
In the DLI position, In Use and Drive Select signals lock
the door. In the DL2 position, the In Use signal locks the
door (see Table 2-4). The disk drive is supplied with DLI
selected.
2.8.6.3 DH Jumper
When DHI is selected, a Door Lock Hold signal (generated by
the disk drive) locks the door. In the DH2 position, the
Door Lock Hold signal is disabled (see Table 2-4). The disk
drive is supplied with DHI selected.
2-13