FDC37C669 datasheet(34/164 Pages) SMSC

Part #	FDC37C669

Description	PC 98/99 Compliant Super I/O Floppy Disk Controller with Infrared Support

PDF	164 Pages

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Manufacturer	SMSC [SMSC Corporation]

Direct Link	http://www.smsc.com

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34 / 164 page

STATUS REGISTER ENCODING

During the Result Phase of certain commands, the Data Register contains data bytes that give the

status of the command just executed.

Table 14 - Status Register 0

BIT NO.

SYMBOL

NAME

DESCRIPTION

7,6

Interrupt

Code

00 - Normal termination of command. The specified

command was properly executed and completed

without error.

01 - Abnormal termination of command.

Command

execution was started, but was not successfully

completed.

10 - Invalid command.

The requested command

could not be executed.

11 - Abnormal termination caused by Polling.

Seek End

The FDC completed a Seek, Relative Seek or

Recalibrate command (used during a Sense Interrupt

Command).

Equipment

Check

The TRK0 pin failed to become a "1" after:

80 step pulses in the Recalibrate command.

The Relative Seek command caused the FDC to

step outward beyond Track 0.

Unused. This bit is always "0".

Head

Address

The current head address.

1,0

DS1,0

Drive Select

The current selected drive.

FDC37C669 Datasheet(PDF) 34 Page - SMSC Corporation