Calculate a generic additive modulo-256 or byte-wise XOR result from hexadecimal bytes you provide.
A fabricated byte-sequence example
For the illustrative bytes 12 34 56, additive modulo-256 gives 0x12 + 0x34 + 0x56 = 0x9C (18 + 52 + 86 = 156, which is below 256). Byte-wise XOR gives 0x12 XOR 0x34 = 0x26, then 0x26 XOR 0x56 = 0x70.
These results describe only the selected calculations on this fabricated sequence. A calculated value is meaningful for validation only when the selected range and checksum algorithm match the external specification or format being checked. See Generic Checksums: Additive Modulo 256 and XOR for worked arithmetic and limitations.
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