Hardware Interface; Disc Drive - HP Vectra Reference Manual

Hardware Interface
The 360KB Internal Flexible Disc Drive interfaces with the flexible
disc controller (FDC) in two areas: the control interface and the DC
power interface. The signals for operating the disc drive are
generated through the flexible disc controller (FDC) section on the
processor board. The 34-pin connector pin assignments and signal
descriptions are given in Section 2. The following table defines the
pins used in the DC power interface.
Table 9.2
DC
PO\Ner Interface Pin Assignments
Pirl Signal Name
1
+
12 Vdc
2
+
12 Vdc return
3
+
5 Vdc return
4
+
5 Vdc
HP45812A 1.2Mb Internal Flexible
Di~;c
Drive
The 1.2MB Internal Flexible Disc Drive can be purchased as an
accessory (HP product number 45812A). The flexible disc
controller subsystem can support up to two of these dual-mode
internal flexible disc drives.
The 1.2MB drive differs from the 360KB disc drive in three major
ways: 1) the media on the 1.2MB drive rotates at 360 rpm, 2) the
read/write gap is half the width of the 360KB disc drive, 3) it has
two distinct read/write channels.
Disc Drives 105