IBM 5150 PC Technical Reference (6025005, August, 1981) (PDF)

Command Summary (continued)
DATA BUS
PHASE RIW 07 06 05 04 03 02 01 DO REMARKS
WRITE DELETED DATA
Command W MT MF 0 0 1 0 0 1 Command Codes
W X X X X X HO US1 usn
W C Sector 10 information
W H prior to command
W R execution
W
N
Execution
Result
W
W
W
EDT
GPL
DTL
Data-transfer between
FDD and main-system
Status 10 information
after common execution
R
R
ST 0
ST 1
R ST 2
R C Sector 10 information
R H after command execution
R
R
R
N
READ A TRACK
Command W 0 MF SK 0 0 0 1 0 Command Codes
W X X X X X HD US1 usn
W C Sector 10 information
W H prior to command
W R execution
W
N
W
EDT
W
GPL
W
DTL
Execution
Data-transfer between
the FDO and main-system.
FDC reads all of cylinders
contents from index hole
to EDT.
Result R STO Status information after
R ST 1 command execution
R ST 2
R C Sector 10 information
R H after command execution
R
R
R
N
READID
Command W 0 MF 0 0 1 0 1 0 Command Codes
W X X X X X HD US1 usn
Execution
The first correct ID
information on the
cylinder is stored in
data register.
Result R STO Status information
R ST 1 after command execution
R ST 2
R C Sector 10 information
R H during execution phase
R
R
R
N
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