FDC37C78 Ver la hoja de datos (PDF) - SMSC -> Microchip

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FDC37C78

Floppy Disk Controller

SMSC -> Microchip 

BIT NO.

7

6

5

4

3

2

1

0

SYMBOL

CM

DD

WC

BC

MD

Table 16 - Status Register 2

NAME

DESCRIPTION

Unused. This bit is always "0".

Control Mark

Any one of the following:

1.

Read Data command - the FDC encountered a

deleted data address mark.

2.

Read Deleted Data command - the FDC

encountered a data address mark.

Data Error in The FDC detected a CRC error in the data field.

Data Field

Wrong

Cylinder

The track address from the sector ID field is different

from the track address maintained inside the FDC.

Unused. This bit is always "0".

Unused. This bit is always "0".

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.

Missing Data The FDC cannot detect a data address mark or a deleted

Address Mark data address mark.

24

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