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Table B1
Microsoft/Intel APM ROM BIOS Function Summary
| Function | INT 15 | 16 Bit | 32 Bit | Requires 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) | XXX | XXX | XXX | Yes |
| CPU Idle (05h) | XXX | XXX | XXX | Yes |
| CPU Busy (06h) | XXX | XXX | XXX | Yes |
| Set Power State | XXX | XXX | XXX | Yes |
| Enable/Disable Power Management (08h) | XXX | XXX | XXX | Yes |
| Restore Power on Defaults (09h) | XXX | XXX | XXX | Yes |
| Get Power Status (0Ah) | XXX | XXX | XXX | No |
| Get PM Event (0Bh) | XXX | XXX | XXX | Yes |
| Get Power State (0Ch) | XXX | XXX | XXX | Yes |
| Enable/Disable Device Power Management (0Dh) | XXX | XXX | XXX | No |
| APM Driver Version (0Eh) | XXX | XXX | XXX | Yes |
| Engage/Disengage Power Management (0Fh) | XXX | XXX | XXX | Yes |
| Get Capabilities (10h) | XXX | XXX | XXX | No |
| Get/Set/Disable Resume Timer (11h) | XXX | XXX | XXX | Yes |
| Enable/Disable Resume on Ring Indicator (12h) | XXX | XXX | XXX | Yes | Enable/Disable Timer Based Requests (13H) | XXX | XXX | XXX | Yes |
| OEM APM Function (80h) | XXX | Optional | Optional | Yes |