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Definition:
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An error-checking routine that verifies the
accuracy of transmissions. It is the exclusive OR of all characters
following the STX
(start of text) up to and including the ETX (end of text). What this
means is that the binary representation of all the characters in a
transmission are cumulatively added in a column and each resulting
odd integer is assigned a 1 and each even integer a 0 (two 1s = 0,
two 0s = 0, a 1 and a 0 = 1). The extra LRC character is then
appended to the transmission, and the receiver (usually the host)
performs the same addition and compares the results.
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