JANUS? 2020 Hand-Held Computer (4MB) - Intermec

Resetting the Reader
NF BC Booting and Resetting the Reader
Resetting the reader can involve forcing the reader to turn off, or stopping
applications and clearing the reader’s conventional memory.
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Note: Turning off the reader by pressing does not clear the reader’s conventional
memory. When you turn the reader back on, it resumes operating just as it was before
you put it in Suspend mode.
Forcing the Reader to Turn Off
If the reader will not turn off when you press , you can force the reader to
turn off by pressing - -. It may take a few seconds before the reader
turns off.
Later, when you press to turn the reader on, the Boot Loader menu appears.
From the menu, you can dump the contents of conventional memory to
another computer and/or you can cold boot the reader.
For help, see “Dumping the Reader’s 640K Conventional Memory” later in this
chapter, and then see “Cold Booting the Reader” earlier in this chapter.
Breaking Out of an Application
If the application you are running becomes locked in an infinite loop, you can
break out of that application without cold booting.
The procedure involves setting a flag, called the application break bit, in the
reader. Applications check the application break bit when you turn on the
reader to determine if they should resume running. If the bit is set to 1, the
programs will not resume.
IRL applications automatically check the application break bit. If you are
creating your own applications in C or Basic, you should make each
application check this bit every time the reader is turned on. See your JANUS
PSK reference manual to learn how to check the application bit.
Note: If your C or Basic application is locked in an infinite loop and does not check the
application bit, you can cold boot the reader to break out of the application.
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