24 set max address (f9h), 25 read native max address (f8h) – Toshiba MK6017MAP User Manual

Page 86

360014937

- 586 -

10.8.24 Set Max Address (F9h)

COMMAND CODE

1 1 1 1 1 0 0 1

NORMAL COMPLETION

DRIVE No.

no change

Max. cylinder number

no change

Max. head number

no change

Max. sector number

no change

SC 00

/ 01

(BITO: reserved bit)

no change

LBA

Max. LBA

no change

This command specifies the the maximum address in a range of actual drive capacity. The values set in CY,
HD, SN registers indicate the maximum address that can be accessed. In CHS mode, the value of Read Native
Max Address command should be set in HD, SN register. Otherwise, the value shall be ignored and the value of
Read Max Address command will be used. If an LBA bit (DRV / HD register bit 6) is set, the value in LBA mode
shall be set. If the address exceeding the set value is accessed , “ ABORT ERROR “ error will be reported. This
set value affects the values of WORD 1, 54, 57, 58, 60, 61 of IDENTIFY DEVICE command.

This command shall be immediately preceded by Read Native Max Address command. Otherwise, it will be
terminated with “ ABORT ERROR ” .

If this command is issued twice with a volatile bit set to 1 after power-up or hardware reset, “ID Not Found
error” will be reported.

Volatile bit ( SC register bit 0 ) :
If this command is issued with a volatile bit set to 1, the set value of this command is valid after power-up or
hardware reset.
If this command is issued with a volatile bit cleared to 0, the set value of this command shall be cleared after
hard reset or power-on and the maximam value shall be the last value with a volatile bit set to 1.

10.8.25 Read Native Max Address (F8h)

COMMAND CODE

1 1 1 1 1 0 0 0

NORMAL COMPLETION

DRIVE No.

no change

maximum cylinder number

maximum head number

maximum sector number

LBA

maximum

LBA

This command sets the maximum address in CY, HD, SN register. If LBA ( DRV / HD register bit6 ) is set to 1,
the maximum address shall be LBA value.