Specifications

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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 2.14
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.