Access Sense - IBM 5114 Maintenance Information Manual

ACCESS SENSE
Bus In Bit
0
-New Media
If no index pulse is sensed for 200 ms or an index pulse
duration exceeded 16 ms, this bit turns on indicating the
, new media' latch is set.
Bus In Bit 1 - MFM
If this bit is on the diskette adapter is in M FM mode~ If
this bit is off the diskette adapter is in
FM
mode.
Bus In Bit
2 -
Inner Track Select (filter control)
This bit indicates the status of the inner track select
(filter control) latch.
Bus In Bit 3 - Inner Tracks
This bit indicates the status of the inner tracks latch.
Bus In Bit 4 - Head Engage
This bit indicates whether the heads are loaded or
. unloaded.
Bus In Bit
5 -
Head Selected
This bit indicates which side of the diskette. is being
used.
Bus In Bits
6
and
7 - Access Lines
These bits indicate the status of the access lines.
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