Transcend CompactFlash 400X - Read Buffer and Read DMA Commands; Read Buffer Command (E4 h); Read DMA Command (C8 h); Read Long Sector Command

T
T
T
S
S
S
1
1
1
6
6
6
G
G
G
~
~
~
6
6
6
4
4
4
G
G
G
C
C
C
F
F
F
4
4
4
0
0
0
0
0
0
400X CompactFlash Card
Transcend Information Inc.
V1.0
75
This command always fails with the CompactFlash Storage Card returning command aborted.
Bit ->
7 6 5 4 3 2 1 0
Command (7)
00h
C/D/H (6)
X Drive
X
Cyl High (5)
X
Cyl Low (4)
X
Sec Num (3)
X
Sec Cnt (2)
X
Feature (1)
X
 Read Buffer - E4h
The Read Buffer command enables the host to read the current contents of the CompactFlash Storage Card’s
sector buffer. This command has the same protocol as the Read Sector(s) command.
Bit ->
7 6 5 4 3 2 1 0
Command (7)
E4h
C/D/H (6)
X Drive
X
Cyl High (5)
X
Cyl Low (4)
X
Sec Num (3)
X
Sec Cnt (2)
X
Feature (1)
X

Read DMA – C8h
 Read Long Sector - 22h or 23h