It has three small lines in the bottom of the screen:
- The first one shows the instantaneous processor use percentage, and it's colour shows the speed at what it is running in hundreds of MHz.
- The second One shows the battery charge state, and it's colour the current consumption in hundreds of mA.
- The third one shows the free memory percentage from the one assigned to run programs, and it's colour the number of 8MB free blocks.

The colours of the code are these:
ZERO ONE TWO THREE FOUR FIVE SIX SEVEN EIGHT NINE

SOURCE

http://personales.ya.com/beemer/xscalemonitor.htm

Reviews:

** [Jan 31, 2009] by Heirophant using Acer n310
Too inscrutable. Colour coding impossible to remember (and no pop-up key to help you), and appears to be inaccurate: it shows my cpu as grey which according to the chart means 800 MHz whereas its 300MHz.