Data Signals; Status Signals - HP Vectra Reference Manual

Data Signals
Signal
1/0
Description
- READ DATA I The selected drive supplies a pulse on the
line for each flux change encountered on
the disc.
-WRITE DATA 0
Status Signals
For each inactive to active transition of this
line while write enable is active, the
selected drive causes a flux change to be
stored on the disc.
Signal
1/0
Description
- DISC CHG I Indicates that the drive door has been
opened.
-INDEX
- TRACK
00
I
-WRITE
PROTECT
52 Processor Board
The selected drive supplies one pulse per disc
revolution on this line.
The selected drive makes this line active if the
read/write head is over track
o.
The selected drive makes this line active if a
write-protected disc is mounted in the drive.