HP 9121D/S User Manual page 14

HP 9121/22 DIS
NOTE
A disc must be in the drives to perform test 6 through 14. Ensure
that the discs are not write protected and that they are
initialized scratch discs.
Available Test
Test Time
o
RAM 2s
ROM
2s
2 HP-IB
chip
2s
3 FDC chip
2s
4 Drive 0 Seek
3s
5 Drive
seek 3s
6 Motor 0 speed 3s
7 Motor 1 speed 3s
8 Write/verify disc 0 80s
9
Write/verify disc 80s
10 Verify disc 0 35s
11 Verify disc 40s
All patterns are written in all
locations of RAM
A checksum calculation is performed
Two of the registers are written and
their content verified.
Two of the registers are written and
their content verified.
Commands are given to the FDC to move
the head on and off of track
O.
The
track 0 indicator is checked to see
that movement occurred.
Same as above but on drive 1.
The head is stepped to track 35 and
loaded. The period of the index pulse
is measured and compared against the
specification. No test if no disc in
drive.
Same as above but on drive
1.
Write on every sector of the disc and
verify the data written.
Same as above but on drive 1.
All sectors in the data area of the
disc are checked for CRC errors.
Same as above but on drive
1.
5-4