Toshiba 4006GAH ユーザーズマニュアル

 

 

Toshiba Corporation Digital Media Network Company 

 

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COMMAND CODE 

1 1 0 0 1 0 1 X

REGISTER 

 

REGISTER SETTING 

NORMAL COMPLETION 

DR 

drive no. 

no change 

CY 

starting cylinder 

last possible 

HD 

starting head 

last possible 

SN 

starting sector 

last possible 

SC 

no. of sector to write 

00H 

FT  

no 

change 

LBA 

staring address 

last address 

 

This command is basically identical to Sector command except following differences. 

• 

Host initialize the DMA channel before issuing command. 
- Data transfer is initiated by DMARQ and handled by the DMA channel in the host. 
- Drive issue only one interrupt at the completion of each command to show the status is valid after data 
transfer. 

 

During DMA transfer phase, either BSY or DRQ is set to 1. 
When a command is completed, CY, HD, SN register (LBA register) shows the sector transferred the latest. 
If the drive detects unrecoverable error, the drive terminates the command and CY, HD, SN register (LBA 
register) shows the sector where error has occurred. 

 

 

COMMAND CODE 

0 0 1 1 0 1 0 1

 

REGISTER 

 

REGISTER SETTING 

NORMAL COMPLETION 

DR 

 

drive no. 

no change 

LBA 

Low 

Current 

Previous 

LBA(7:0) 

LBA(31:24) 

HOB=0
HOB=1

last address 
last address 

LBA 

Mid 

Current 

Previous 

LBA(15:8) 

LBA(39:32) 

HOB=0
HOB=1

last address 
last address 

LBA 
High 

Current 

Previous 

LBA(23:16) 
LBA(47:40) 

HOB=0
HOB=1

last address 
last address 

SC Current 

Previous 

sector count(7:0) 

sector count(15:8) 

HOB=0
HOB=1

00H 
00H 

FT Current 

Previous 

reserved 
reserved 

HOB=0
HOB=1

no change 
no change 

 

This command is basically identical to Write DMA command except register setting.   

This command is available in LBA addressing only.