SECTION 4
Power Management
4-6 PEN*KEY
R
6100 Computer Programmer’s Reference Guide
Table 4Ć8
Power States (System)
Power State
Description
READY
No action
STANDBY
No action
SUSPEND
The system is placed into SUSPEND. Any APMĆdisabled devices are
left in the power state they were set to before entering suspend.
OFF
Same as SUSPEND
PROCESSING No action is performed
REJECTED
No action is performed
Table 4Ć9
Power States (Backlight)
Power State Description
READY
The backlight is turned on.
STANDBY
(not defined)
SUSPEND
(not defined)
OFF
The backlight is turned off
APM Software Interface
The following paragraphs describe the software interface between the APM
BIOS and the APM driver. Refer to the
Conversions and Interfaces
section of this
publication for details of the actual BIOS interrupts.
APM Connection
The APM driver provides an interface between the APM BIOS and APMĆaware
applications. When the interface between the APM BIOS and device driver is
established, the APM driver receives powerĆrelated events from the APM BIOS,
which the driver in turn broadcasts to APMĆaware applications.
The
APM Installation Check
function determines whether ELANAPM.EXE is
present in the system, the version of APM that ELANAPM.EXE supports, and
the attributes of the implementation. The APM driver issues an APM ConnecĆ
tion call
to establish the appropriate cooperative connection with the APM BIOS.
The
APM Interface Disconnect
function disconnects the cooperative connection
between the APM Driver and the APM BIOS. Only one APM connection can be
active at a time.
Power Management Events
Power Management Events are communicated from the APM BIOS to the APM
driver through a call by the APM driver to the APM BIOS function
Get PM
Event
. It is the responsibility of the APM driver to broadcast Power ManageĆ
ment Events to its APMĆaware applications.
4. Power Management
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Страница 112: ...SECTION 4 Power Management 4 10 PEN KEYR 6100 Computer Programmer s Reference Guide 4 Power Management ...
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