Calculates the 8-bit checksum for a sequence of hexadecimal bytes. Bytes are provided as two-character strings. Characters can be in upper or lower case. Spaces are ignored but there must be an even number of characters.
The 8-bit checksum is the 2's complement of the sum off all bytes. The checksum value, when added to the sum of all bytes produces a result of zero.
Enter value for Hex and press the "calculate" button to calculate the 8-bit checksum.
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