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As described above, if the system power is turned on without an application installed (i.e. the
conditions just after purchase), the CONFIG.SYS and AUTOEXEC.BAT files locating on the basic
drive will be executed automatically. This inevitably initiates the System Menu (maintenance
program). Therefore, if not only CONFIG.SYS and AUTOEXEC.BAT, but also an application
program are installed on the user drive, it is possible for the application program to be automatically
initiated from the user drive.
Example 1
In the following example MS-DOS is loaded from the RAM disk which has been designated as the
current drive, since the system finds the CONFIG.SYS and AUTOEXEC.BAT first in the RAM
disk.
Fig. 4.2
Example 2
In the following example the RAM disk contains only CONFIG.SYS. As a result, MS-DOS is
loaded from the F-ROM drive designated as the current drive.
Fig. 4.3
Example 3
The following example shows a case where there is no F-ROM drive. The search order is also the
same in this case. However in this case, CONFIG.SYS and AUTOEXEC.BAT in the basic drive
will be executed, and System Menu will be initiated.
Fig. 4.4
NO CARD
ATA CARD
CONFIG.SYS
AUTOEXEC.BAT
APPLICATION
F-ROM
CONFIG.SYS
AUTOEXEC.BAT
APPLICATION
Basic Drive
CONFIG.SYS
AUTOEXEC.BAT
APPLICATION
RAM DISK
NO CARD
ATA CARD
CONFIG.SYS
AUTOEXEC.BAT
APPLICATION
F-ROM
CONFIG.SYS
AUTOEXEC.BAT
APPLICATION
Basic Drive
CONFIG.SYS
APPLICATION
RAM DISK
NO CARD CONFIG.SYS
AUTOEXEC.BAT
APPLICATION
CONFIG.SYS
APPLICATION