Panasonic JS-170FR Series Service Manual page 74

[Specification for Magnetic Card Control]
Contents of magnetic card control specified for the PENTIUM POS
(1) Connected to the keyboard connector.
(2) ISO 7810 compatible. (Second track)
(3) ID to be used is of the 5-bytes data with 0 included.
(4) For reference: ID = B00012F7
a. "B" is the front byte. (Start code)
b. "00012" is an ID of the 5-byte data with 0 included.
c. "F" is the end byte. (End code)
d. "7" is a check byte.
(5) Check byte calculation
a) The header B is set in the binary data. (Result = 0bh)
b) An exclusive OR is established with "0" of the front ID data. (Result = 0bh)
c) An exclusive OR is established with "0" of the second ID data. (Result = 0bh)
d) An exclusive OR is established with "0" of the third ID data. (Result = 0bh)
e) An exclusive OR is established with "1" of the fourth ID data. (Result = 0ah)
f) An exclusive OR is established with "2" of the fifth ID data. (Result = 08h)
g) An exclusive OR is established with "F" of the end data. (Result = 07h)
h) The above-mentioned result is compared with "7" for the check byte.
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