Juniper-systems Allegro DOS Manual Manual de usuario descargar pdf (Pagina 33)

Hardware Features Page 2-15

Cleaning the Touchscreen

Disable the touchscreen before you wipe it off or clean it to avoid

inadvertently making selections on the screen (see instructions below).

Use a clean cotton cloth to gently wipe off the screen. Do not use

anything abrasive that could scratch the screen (including tissues and

paper towels). If you use a cleaning solution such as glass cleaner or a

mild detergent, it is best to spray it onto the cloth instead of directly

onto the screen. (Note: petroleum-based cleaners and solvents should

not be used. They can damage polycarbonate.)

Touchscreen Disable/Enable Key

The touchscreen key disables and enables the touchscreen. Press the

BLUE shift key and the <TS> key to disable the screen. Once the screen

has been cleaned, use the same key sequence to enable the touchscreen.

▲▲

▲ Adjusting Font Size

➫➫

➫

DOSDOS

DOS

There are four font sizes available in DOS:

Font Size Pixels (character width x height)

40 characters x 25 lines 8 x 8

(used for FileScout DOS

Utility Programs)

40 characters x 16 lines (default) 8 x 12

32 characters x 16 lines 10 x 12

20 characters x 12 lines 16 x 16

To toggle between the font sizes, press the GOLD shift key and the <Z>

key (for “Zoom”).

If you are using a program that was written for another hand-held

computer with a different screen size, select the font size that best fills

the Allegro screen. You can usually avoid making modification to the

original program this way.

When you develop a new DOS program to run on the Allegro, select a

default font that will best display the data on the screen for your

application. If you would like large characters to appear for ease of

reading, use the largest font. If you need to show more data on the

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Juniper-systems Allegro DOS Manual Manual de usuario Pagina 33