Texas Instruments 3000 WinSX - Manual (Page 38)

Keyboard Keys
Turbo
Pressing the Fn-F5 (Turbo) keys increases the CPU processing speed to 20 MHz-if the
Turbo indicator is on, the speed is already 20 MHz. When the Turbo feature is off, the
CPU runs at 5 or 10 MHz. The Turbo feature uses more battery power but provides faster
processing.
When you set the computer to 20-MHz (using the Setup Program, the Windows Notebook
menu Setup icon, or the speed control keys described below), the Turbo indicator comes
on.
Speed Control Keys
Pressing the Ctrl-Alt-
↑
keys increases the CPU processing speed in the range of 5, 10,
and 20 MHz, and the computer sounds low, medium, and high frequency tones. Pressing
the Ctrl-Alt-
↓
keys decreases CPU speed.
2-18 Learning About Your Computer