Cactus 250SH series, Product Manual

Page: 16 / 31

Cactus Technologies, Limited
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.
5.ATA Command Description
This section defines the ATA command set supported by Cactus Technologies ® -250SH series
SSDs.
5.1. ATA Command Set
Table 5-6 summarizes the supported ATA command set .
Table 5-6. ATA Command Set
COMMAND Code
Check Power Mode E5h, 98h
Device Reset 08h
Device Configuration -
Device Configuration Freeze Lock B1h/C1h
Device Configuration Identify B1h/C2h
Device Configuration Restore B1h/C0h
Device Configuration Set B1h/C3h
Download Microcode 92h
Data Set Management 06h
Execute Drive Diagnostic 90h
Flush Cache E7h
Flush Cache Ext EAh
Identify Drive ECh
Idle E3h, 97h
Idle Immediate E1h, 95h
Initialize Drive Parameters 91h
Read Buffer E4h
Read DMA C8h
Read DMA Ext 25h
Read FDPMA Queued 60h
Read Log Ext 2Fh
Read Multiple C4h
Cactus Technologies Limited Commercial Grade -250SH Series SSD Product Manual v2.1 16