File Unsafe Jumper (Fr) - NEC FD1165 Maintenance Manual

2.8.4 Write Protect Jumper
If the flexible disk has a write protect notch and jumper
position PR1 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 write protect signal to the controller but re­
cording on the disk is permitted.
plied with PRl selected.
2.8.5

File Unsafe Jumper (FR)

Jumper position
Jumper position FR2 enables the File Unsafe function.
disk drive is supplied with FR2 selected.
2*8.6 Door Lock Jumpers (DL, DR, DH)
The Model FD1165 has three door lock jumpers which are used
in different combinations with the In Use signal to deter­
mine the door lock condition.
functions of the door lock jumpers.
2.8.6 .1 DR Jumper
When DRl is selected, the Ready signal from the controller
enables the door lock function
is selected, the door locks function is independent of the
Ready signal. The disk drive is supplied with DRl selected.
2.8.6.2 DL Jumper
In the DL1 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).
selected.
2.8.6.3 DH Jumper
When DH1 is selected, a Door Lock Hold signal (generated by
the disk drive) locks the door.
Door Lock Hold signal is disabled (see Table 2-4).
drive is supplied with DH1 selected.
(PR)
FRl disables the
This section describes the
(see Table 2-4).
The disk drive is supplied with DLl
2-13
The disk drive is sup­
File Unsafe
In the DH2 position,
function.
The
When DR2
the
The disk