Name | Code | Comment |
---|---|---|
System Standby Request Notification | 0x0001 | |
System Suspend Request Notification | 0x0002 | |
Normal Resume System Notification | 0x0003 | |
Critical Resume System Notification | 0x0004 | |
Battery Low Notification | 0x0005 | |
Power Status Change Notification | 0x0006 | |
Update Time Notification | 0x0007 | |
Critical System Suspend Notification | 0x0008 | |
User System Standby Request Notification | 0x0009 | |
User System Suspend Request Notification | 0x000A | |
System Standby Resume Notification | 0x000B | |
Capabilities Change Notification | 0x000C | Due to setup or device insertion/removal |
Name | Code | Comment |
---|---|---|
APM Installation Check | 0x00 | |
APM Real Mode Interface Connect | 0x01 | |
APM Protected Mode 16-bit Interface Connect | 0x02 | Avoids real or virtual86 mode. |
APM Protected Mode 32-bit Interface Connect | 0x03 | Avoids real or virtual86 mode. |
APM Interface Disconnect | 0x04 | |
CPU Idle | 0x05 | Requests system suspend. 0) Clock halted until timer tick interrupt. 1) Slow clock[1] |
CPU Busy | 0x06 | Driver tells system APM to restore clock speed of the CPU. |
Set Power State | 0x07 | Set system or device into Suspend/Standby/Off state. |
Enable/Disable Power Management | 0x08 | |
Restore APM BIOS Power-On Defaults | 0x09 | |
Get Power Status | 0x0A | Supports AC status 'On backup power'. And battery status. |
Get PM Event | 0x0B | Checks for APM events. Shall be called once per second. |
Get Power State | 0x0C | |
Enable/Disable Device Power Management | 0x0D | |
APM Driver Version | 0x0E | |
Engage/Disengage Power Management | 0x0F | APM management for a specific device. |
Get Capabilities | 0x10 | |
Get/Set/Disable Resume Timer | 0x11 | |
Enable/Disable Resume on Ring Indicator | 0x12 | |
Enable/Disable Timer Based Requests | 0x13 | |
OEM APM Installation Check | 0x80 | Tells if APM BIOS supports OEM hardware dependent functions. |
OEM APM Function | 0x80 | Access to OEM specific functions. |
The ATA Spec turns up this tidbit: Subcommand code 05h allows the host to enable Advanced Power Management. To enable Advanced Power Management, the host writes the Sector Count register with the desired advanced power management level and then executes a SET FEATURES command with subcommand code 05h.