Table 16 - Status Register 2
NAME
BIT NO.
SYMBOL
DESCRIPTION
Unused. This bit is always "0".
Control Mark Any one of the following:
1. Read Data command - the FDC encountered a
7
6
CM
deleted data address mark.
2. Read Deleted Data command
encountered a data address mark.
-
the FDC
5
4
DD
Data Error in The FDC detected a CRC error in the data field.
Data Field
WC
Wrong
The track address from the sector ID field is different
from the track address maintained inside the FDC.
Cylinder
3
2
1
Unused. This bit is always "0".
Unused. This bit is always "0".
BC
Bad Cylinder The track address from the sector ID field is different
from the track address maintained inside the FDC and
is equal to FF hex, which indicates a bad track with a
hard error according to the IBM soft-sectored format.
0
MD
Missing Data The FDC cannot detect a data address mark or a
Address Mark deleted data address mark.
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