PowerBook 150 Update Extension
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When the PowerBook 150 has an internal modem, the modem continues to draw power when not in use. This shortens the battery life. Apple released the PowerBook 150 Update extension to correct this problem.
The update extends battery life by reducing power requirements during sleep mode. It also fixes a potential system freeze problem that occurs when you use the internal modem several times without restarting the computer.
System 7.5 Update 1.0
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If you have installed the System 7.5 Update 1.0, you will no longer need the PowerBook 150 Update extension. The same software fix has been incorporated into the System 7.5 Update file. This file resides "loose" in the System Folder.
The System 7.5 Update file contains the functionality of and removes the following extensions: EM Sound Update, PowerBook 150 Update, and Mount IDE Drive.
Since the PowerBook 150 Update system extension is no longer needed, it is automatically removed from the Extensions folder (inside the System Folder) during installation of the System 7.5 Update 1.0.
These articles can help you locate the software update mentioned here:
* Where To Find Apple Software Updates
Lists online services for "free" Apple software updates.
* Obtaining Apple Product Support in the USA
Lists 800 numbers and online services for software updates, Apple
support information, and a subset of the Apple Tech. Info. Library.
Support Information Services