PowerBook Control Panel

C H A P T E R 3

Software Modiﬁcations

Figure 3-1PowerBook Setup panel

If you have a third-party modem installed, the control titles will be Internal Modem/ External Modem, and they will behave accordingly. They are the same as those used in PowerBook 7.1.

IMPORTANT

If you select Compatible, port A (Printer/Modem, Modem) is not available for serial connections. AppleTalk is still available. ▲

PowerBook control panel is a completely new control panel. It now controls only those functions associated with battery and power conservation, as described in the two following sections. The PowerBook control panel is designed for two different groups of users: those who require the power management procedure to be as simple and transparent as possible; and power users who wish to have complete control over the power management functions.

Information about power management is stored in the Preferences ﬁle in the System Folder. When the system is booted, the ﬁle is read and the contents stored permanently in memory.

Custom and Easy Controls for Battery Conservation

There are two methods of accessing controls. Initially, if you open the PowerBook control panel, you will see one simple slider switch (Figure 3-2) that controls a number of functions. You may adjust this slider, as required, or leave it in the default position.

However, if you click the Custom button in the control panel, you may then select from additional controls. For example, if you click Custom in the panel that contains the Battery Conservation slider, you will be able to access three additional sliders that are subsets of Battery Conservation. They are System Sleeps, HD Spins Down, and Backlight Dims. If you move any of these sliders, the change will be reﬂected in the Battery Conservation slider. Feedback will alert you as to whether the changes improve

PowerBook Duo 250 Control Panels