Conventional Memories

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Index

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TECHNICAL NOTE (97001)

Summary: APM & Power Support on Toshiba Computers
Date: September 29, 1995
Product: As listed
Problem / Issue: Usage of Advanced Power Management
Solution: See Below
Additional Information: TSB-0303-U

BASIC APM SUPPORT:

APM.SYS loads in your CONFIG.SYS file and, when loaded, makes the following series of models APM compliant:

T1800

T1850

T1900

T4500

T4600

There are no switches so it is simply installed by putting "DEVICE=C:\DOS\APM.SYS" into the CONFIG.SYS file.

The following models have APM in the ROM BIOS so the APM.SYS driver is not used:

T1910

T1950

T3400

T4700

All future models are also expected to have APM support in the BIOS.

All models, whether using APM.SYS or with APM in BIOS, require use of POWER.EXE as indicated below.

POWER UTILITY:

POWER.EXE is the DOS 5.0/6.x APM power manager to reduce power consumption when applications and devices are idle. POWER.EXE must first be loaded in CONFIG.SYS as a device driver. Then can be executed as a utility to vary settings in AUTOEXEC.BAT or at the DOS prompt.

POWER.EXE Syntax:

Device driver usage (required)

device=[drive:][path]POWER.EXE [adv [:max | reg | min] | std | off] [/low]

Command line usage:

POWER [adv: [max | reg | min] | std | off]

To display the current power setting, enter "POWER" at a DOS prompt.

Parameters:

adv [:max|reg|min] Conserves power when applications and

hardware devices are idle. In some cases,

performance may be affected if an application is active instead of idle. Use `max' for maximum power conservation. Use `reg', the default setting, to balance power conservation with application and device performance. Use `min' if the performance of an application or device is not satisfactory when you specify `max' or `reg'.

std Conserves power by using only the power-management features

of your computer's hardware.

off Turns off power management.

/low Only used in CONFIG.SYS file. Loads the device driver into

low memory, even if there is UMA available. By default, POWER.EXE is loaded into UMA if the UMA is available.

WINDOWS 3.1 SETUP:

Select the computer type of "MS-DOS system with APM"

Models that feature APM in the BIOS (see the BASIC APM SUPPORT paragraph above) do not require the WRESUME.386 be installed via SYSTEM.INI when the "MS-DOS system with APM" machine type is selected.

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Toshiba America Information Systems Inc. (" TAIS ") shall not be liable for damages of any kind for use of this information, Which is subject to change without notice. Copyright 1994, 1995 TAIS.