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13.36 Set Multiple (C9h)
Table 110: Set Multiple command (C6h)
Command Block Output Registers
Register
Data
Feature
Sector Count
LBA Low
LBA Mid
LBA High
Device
Command
Error Register
7
6
5
CRC UNC
0
IDN
0
0
0
The Set Multiple command enables the device to perform Read and Write Multiple commands and establishes the
block size for these commands. The block size is the number of sectors to be transferred for each interrupt.
The default block size after power up or hard reset is 0. The Read Multiple and Write Multiple commands are dis-
abled.
If an invalid block size is specified, an Abort error will be returned to the host. The Read Multiple and Write Mul-
tiple commands will be disabled.
Output parameters to the device
Sector Count
7 6 5 4 3 2 1 0
- - - - - - - -
- - - - - - - -
V V V V V V V V
- - - - - - - -
- - - - - - - -
- - - - - - - -
1 - 1 D - - - -
1 1 0 0 0 1 1 0
4
3
2
1
0
ABT T0N AMN
0
0
V
0
This indicates the block size to be used for the Read Multiple and the Write Multiple com-
mands. Valid block sizes can be selected from 0, 2, 4, 8 or 16. If 0 is specified, then the
Read Multiple and the Write Multiple commands are disabled.
Travelstar 80GN Hard Disk Drive Specification
Command Block Input Registers
Register
Data
Error
Sector Count
LBA Low
LBA Mid
LBA High
Device
Status
0
7
6
5
BSY RDY DF DSC DRQ
0
0
V
0
159
7 6 5 4 3 2 1 0
- - - - - - - -
see below
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
see below
Status Register
4
3
2
1
COR IDX
-
-
0
-
0
ERR
V
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