30
2.1.9 Memory Corruption Check
Checksum is carried out in order to detect whether the OS deployed in the memory is corrupted or
not, and the OS is reloaded if it is necessary.
Table 2.15
Confirm the checksum
OS load
On Soft Reset
Carried out
Carried out when error of
checksum occurs.
On Full Reset, Hard Reset, User Disk
Clean and Power-on Reset
- Carried
out
On Suspend and Resume (see notes)
No
No
Notes:
•
The reason that the checksum is not carried out on suspending and resuming is for
high-speed performance. But, memory corruption check is carried out to check if the RAM
is in error status by any reason.
•
The RAM corruption check is performed by writing fixed data (0x00 to 0xFF) into a fixed
area (256 bytes area) in the RAM prior to performing the check, and the value written in the
RAM is verified at a time of Resume. If an error is detected, warning message for memory
corruption check is issued, and then reset is performed and the OS files are reloaded.
Summary of Contents for IT-800 Series
Page 173: ...173 Copyrights Tab This tab is for displaying the OS copyright information Figure 3 19 ...
Page 201: ...201 Date Tab This tab is for setting display format of date Figure 3 56 ...
Page 247: ...247 4 2 Games The terminal comes with two games Solitaire and Bubble Breaker Figure 4 2 ...
Page 255: ...255 4 5 Calculator The application can be used to operate nine digit calculator Figure 4 11 ...