Read Buffer (E4H); Figure 111. Read Buffer Command (E4H) - Hitachi ic35l060avv207-0 - Deskstar 60 GB Hard Drive Specifications

11.13 Read Buffer (E4h)

Command Block Output
Register
Data
Feature
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Command
Error Register
7 6 5
CRC UNC 0
0 0 0

Figure 111. Read Buffer Command (E4h)

The Read Buffer command transfers a sector of data from the sector buffer of device to the host.
The sector is transferred through the Data Register 16 bits at a time.
The sector transferred will be from the same part of the buffer written to by the last Write Buffer
command. The contents of the sector may be different if any reads or writes have occurred since the
Write Buffer command was issued.
Registers
7 6 5 4 3 2 1 0
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
1 - 1 D - - - -
1 1 1 0 0 1 0 0
4 3 2 1
IDN 0 ABT T0N
0 0 V 0
Deskstar 180GXP hard disk drive specifications
Command Block Input
Register
Data
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
Status Register
0 7 6
AMN BSY RDY DF
0 0 V
131
Registers
7 6 5 4 3 2 1 0
- - - - - - - -
see below
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
see below
5 4 3 2 1
DSC DRQ COR IDX
0 – – 0 –
0
ERR
V