After dump the ACPI table,we will need to verify if all of table is compliance with ACPI spec.we need to verify the checksum filed .
Here,I would write about the checksum calculation for RSDP table.
First of all,we review the ACPI 6 spec and find the below description. ‘ This includes only the first 20 bytes of this table, bytes 0 to 19, including the checksum field.These bytes must sum to zero ‘
Therefore, the checksum of RSDP table depends on the structure bytes from 0 to 19.we can get these from RW utility.
Because the checksum filed length is 1 byte, we comfirm the 1 byte of 0x600H is 0x00H.