Power On Process - Casio IT-2000W Technical Reference Manual

2.2.2 Power ON Process

Overview
The ON process is provided to make the system ready for use (ON state). The actual process varies
depending on the settings at that point in time and the last OFF factor (the cause of the OFF action).
ON factors:


Pressing the Power switch


Pressing the RESET switch


Power ON alarm


Reception of RING signal


Mounting on the I/O Box
OFF factors:


Pressing the Power switch


Pressing the RESET switch


Auto Power OFF (APO)


Power OFF by software


Auto Power OFF due to lower battery voltage


Emergency Power OFF due to lower battery voltage
Note:
For more information power OFF factors refer to Chapter 2.2.3 "Power OFF Process".
This ON process is divided into two processes: the "Resume process" for continuing the previous
process and the "Boot process" for re-loading MS-DOS. The Boot process can be further broken into
the "Application boot" and the "System Menu boot" processes.
Fig. 2.4
ON Process


Application Boot Process
Searches CONFIG.SYS and AUTOEXEC.BAT files according to the priority given to each
drive and, if these files are found, sets the drive where these files are located as the current drive.
(refer to "Application Boot Process" on the next page).
Boot Process
Resume Process
21
Application Boot Process
System Menu Boot Process