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Conflicts may occur on the host data bus when this bit is provided by a Floppy Disk Controller
operating at the same addresses as the SSD. Following are some possible solutions to
this problem:
1. Locate the SSD at a non-conflicting address (i.e., Secondary address (377) when a Floppy
Disk Controller is located at the Primary addresses).
2. Do not install a Floppy and a SSD in the system at the same time.
3. Implement a socket adapter that can be programmed to (conditionally) tri-state D7 of I/0
address 3F7/377 when a SSD product is installed and conversely to tri-state D6-D0 of
I/O address 3F7/377 when a floppy controller is installed.
4. Do not use the SSD's Drive Address register. This may be accomplished by either a) If
possible, program the host adapter to enable only I/O addresses 1F0-1F7, 3F6 (or 170-
177, 176) to the SSD or b) if provided use an additional Primary/Secondary
configuration in the SSD that does not respond to accesses to I/O locations 3F7 and
377. With either of these implementations, the host software must not attempt to use
information in the Drive Address Register.
Bit 6 (-WTG)
This bit is 0 when a write operation is in progress, otherwise, it is 1.
Bit 5 (-HS3)
This bit is the negation of bit 3 in the Drive/Head register.
Bit 4 (-HS2)
This bit is the negation of bit 2 in the Drive/Head register.
Bit 3 (-HS1)
This bit is the negation of bit 1 in the Drive/Head register.
Bit 2 (-HS0)
This bit is the negation of bit 0 in the Drive/Head register.
Bit 1 (-nDS1) This bit is 0 when drive 1 is active and selected.
Bit 0 (-nDS0) This bit is 0 when the drive 0 is active and selected.
6.ATA Command Description
This section defines the ATA command set supported by Cactus Technologies
6.1. ATA Command Set
Table 5-6 summarizes the supported ATA command set .
COMMAND
Check Power Mode
Data Set Management
Execute Drive Diagnostic
Flush Cache
Flush Cache Ext
Identify Drive
Idle
Idle Immediate
Initialize Drive Parameters
NOP
Read Buffer
Read DMA
Read DMA Ext
Read FPDMA Queued
Read Multiple
Read Multiple Ext
Read Sector(s)
Read Sector(s) Ext
Cactus Technologies Limited
Cactus Technologies, Limited
Table 5-6. ATA Command Set
Code
E5h, 98h
06h
90h
E7h
EAh
ECh
E3h, 97h
E1h, 95h
91h
00h
E4h
C8h
25h
60h
C4h
29h
20h, 21h
24h
OEM Grade -245S Series mSATA SSD Product Manual
®
mSATA SSDs.
v1.2
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