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5.3 Host Commands
(35) READ NATIVE MAX ADDRESS (X’F8’)
This command posts the maximum address intrinsic to the device, which can be
set by the SET MAX ADDRESS command. Upon receipt of this command, the
device sets the BSY bit and indicates the maximum address in the DH, CH, CL
and SN registers. Then, it clears BSY and generates an interrupt.
At command issuance (I/O registers setting contents)
1F7
H
(CM) 1 1 1 1 1 0 0 0
1F6
H
(DH) x L x DV xx
1F5
H
(CH)
1F4
H
(CL)
1F3
H
(SN)
1F2
H
(SC)
1F1
H
(FR)
xx
xx
xx
xx
xx
At command completion (I/O registers contents to be read)
H
( Status information
1F6
H
(DH) x x x DV Max head/LBA [MSB]
1F5
H
(CH)
1F4
H
(CL)
1F3
H
(SN)
1F2
H
(SC)
1F1
H
(ER)
Max. cylinder [MSB]/Max. LBA
Max. cylinder [LSB]/Max. LBA
Max. sector/Max. LBA [LSB]
xx
Error information
1F7 ST)
C141-E258 5-103