Write Multiple (C5H) - IBM DTTA-351010 - Deskstar 10.1 GB Hard Drive Specifications

12.38 Write Multiple (C5h)

C o m m a n d B l o c k O u t p u t R e g i s t e r s
R e g i s t e r
D a t a
F e a t u r e
S e c t o r C o u n t
S e c t o r N u m b e r
C y l i n d e r L o w
C y l i n d e r H i g h
D e v i c e / H e a d
C o m m a n d
E r r o r R e g i s t e r
7 6 5
C R C U N C 0 I D N
0 0 0
Figure 126. Write Multiple Command (C5h)
The Write Multiple command transfers one or more sectors from the host to the device, the the data is
written to the disk media.
Command execution is identical to the Write Sectors command except that an interrupt is generated for each
block (as defined by the Set Multiple command) instead of for each sector. The sectors are transferred
through the Data Register 16 bits at a time.
Output Parameters To The Device
Sector Count The number of continuous sectors to be transferred. If zero is specified, then 256
sectors will be transferred.
Sector Number The sector number of the first sector to be transferred. ( L = 0 )
In LBA mode, this register contains LBA bits 0 - 7. ( L = 1 )
Cylinder High/Low The cylinder number of the first sector to be transferred. ( L = 0 )
In LBA mode, this register contains LBA bits 8 - 15 (Low), 16 - 23 (High). ( L = 1 )
H The head number of the first sector to be transferred. ( L = 0 )
In LBA mode, this register contains LBA bits 24 - 27. ( L = 1 )
7 6 5 4 3 2 1 0
V V V V V V V V
V V V V V V V V
V V V V V V V V
V V V V V V V V
1 L 1 D H H H H
1 1 0 0 0 1 0 1
4 3 2 1 0
0 A B T T 0 N A M N
V 0 V 0 0
C o m m a n d B l o c k I n p u t R e g i s t e r s
R e g i s t e r 7 6 5 4 3 2 1 0
D a t a
E r r o r . . . S e e B e l o w . . .
S e c t o r C o u n t V V V V V V V V
S e c t o r N u m b e r V V V V V V V V
C y l i n d e r L o w V V V V V V V V
C y l i n d e r H i g h V V V V V V V V
D e v i c e / H e a d
S t a t u s . . . S e e B e l o w . . .
S t a t u s R e g i s t e r
7 6 5 4 3
B S Y R D Y D F D S C D R Q C O R I D X E R R
0 V V V
Command Descriptions
H H H H
2 1 0
0 V
167