To change the speed, move the switch on the front panel as shown in Figure 2-2. To run the computer at 4.77MHz, move the switch to the left. To run it at 10 MHz, move the switch to the right. You can do this at any time without rebooting the system.

Figure 2-2. Speed switch

The power light on the front panel is red when the computer is running at 4.77MHz and green when it is running at 10MHz.

Resetting the Computer

You may occasionally need to reset the computer, either to load a different operating system, or because a program has failed and the computer does not respond to your keyboard commands. However, resetting the computer causes all data in the computer’s temporary memory (RAM) to be lost, so if you have a problem, you should reset the computer only as a last resort.

WARNING: Do not reset the computer to exit a program unless you have to. Some application programs classify and store new data whenever you exit the program prop erly. If you reset the computer while such a program is running, you may lose data.

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