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Appendix B - Intel/Microsoft APM ROM BIOS Function Summary

This appendix is a summary of the complete APM BIOS interface specification. The full specification can be found at the following Web site addresses:

Note: The Web site references are correct at time of going to print but may change as they are out of our control.

Table B1
Microsoft/Intel APM ROM BIOS Function Summary

FunctionINT 1516 Bit32 BitRequires Connection
APM Installation Check (00h)XXX  No
APM Real Mode Interface Connection (01h)XXX  No
APM Protected Mode Connect 16 bit (02h)XXX  No
APM Protected Mode Connect 32 bit (03h)XXX  No
APM Interface Disconnect (04h)XXXXXXXXXYes
CPU Idle (05h)XXXXXXXXXYes
CPU Busy (06h)XXXXXXXXXYes
Set Power StateXXXXXXXXXYes
Enable/Disable Power Management (08h)XXXXXXXXXYes
Restore Power on Defaults (09h)XXXXXXXXXYes
Get Power Status (0Ah)XXXXXXXXXNo
Get PM Event (0Bh)XXXXXXXXXYes
Get Power State (0Ch)XXXXXXXXXYes
Enable/Disable Device Power Management (0Dh)XXXXXXXXXNo
APM Driver Version (0Eh)XXXXXXXXXYes
Engage/Disengage Power Management (0Fh)XXXXXXXXXYes
Get Capabilities (10h)XXXXXXXXXNo
Get/Set/Disable Resume Timer (11h)XXXXXXXXXYes
Enable/Disable Resume on Ring Indicator (12h)XXXXXXXXXYes
Enable/Disable Timer Based Requests (13H)XXXXXXXXXYes
OEM APM Function (80h)XXXOptionalOptionalYes


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