FDC37C78_07 SMSC [SMSC Corporation], FDC37C78_07 Datasheet - Page 22
FDC37C78_07
Manufacturer Part Number
FDC37C78_07
Description
Floppy Disk Controller
Manufacturer
SMSC [SMSC Corporation]
Datasheet
1.FDC37C78_07.pdf
(82 pages)
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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.
BIT NO.
7,6
1,0
5
4
3
2
IC
SE
EC
H
DS1,0
SYMBOL
Interrupt Code 00 - Normal termination of command.
Seek End
Equipment
Check
Head Address The current head address.
Drive Select
NAME
Table 14 - Status Register 0
command was properly executed and completed without
error.
01 - Abnormal termination of 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.
The FDC completed a Seek, Relative Seek or
Recalibrate command (used during a Sense Interrupt
Command).
The TRK0 pin failed to become a "1" after:
1. 80 step pulses in the Recalibrate command.
2. The Relative Seek command caused the FDC to
Unused. This bit is always "0".
The current selected drive.
22
step outward beyond Track 0.
DESCRIPTION
The specified
Command
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