Interface

(37) 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)

1F7H(CM)

1

1

1

1

1

0

0

0

 

 

 

 

 

 

 

 

 

1F6H(DH)

x

L

x

DV

xx

 

 

 

 

 

 

 

 

 

 

 

 

1F5H(CH)

xx

 

 

 

 

 

 

 

1F4H(CL)

xx

 

 

 

 

 

 

 

1F3H(SN)

xx

 

 

 

 

 

 

 

1F2H(SC)

xx

 

 

 

 

 

 

 

1F1H(FR)

xx

 

 

 

 

 

 

 

At command completion (I/O registers contents to be read)

1F7H(ST)

Status information

 

 

 

 

 

 

 

 

1F6H(DH)

x

x

x

DV

Max head/LBA [MSB]

1F5H(CH)

Max. cylinder [MSB]/Max. LBA

1F4H(CL)

Max. cylinder [LSB]/Max. LBA

1F3H(SN)

Max. sector/Max. LBA [LSB]

1F2H(SC)

xx

 

 

 

 

1F1H(ER)

Error information

 

 

5-102

C141-E202-01EN

Page 178
Image 178
Fujitsu MHU2100AT manual Read Native MAX Address X’F8’