IC card info.txt

how to parse FeliCa IC card sector 8f10 (service #66) - "CJRC ticket gate history"

example record:
2000a916100434940850160300000000
--  ====    --------============
io  xxxx    YYMDHHMMfare

- io: gate info
   a0: tapped in
   c0: tapped in w/ commuter pass
   20: tapped out
   40: tapped out w/ commuter pass
   00: record cleared at staffed gate (or never been tapped)

= xxxx: system/line/station code (no region info)
   see columns 2-3 of https://github.com/soltia48/suica-viewer/blob/main/suica_viewer/station_codes.csv
   mirrors @ https://files.catbox.moe/ak903c.csv & https://archive.md/TePxX & wayback machine
   e.g. a916 = meitetsu, mikawa line, toyotashi station

- YYMD: date
   convert to binary & parse 7-bit year, 4-bit month, 5-bit day
   e.g. 3494 = 0011 0100 1001 0100 -> 0011010 = 26, 0100 = 4, 10100 = 20 -> 2026-04-20

- HHMM: time
   as-is
   e.g. 0850 = 8:50 a.m.

= fare:
   reverse order (little to big endian) and convert to decimal
   e.g. 160300000000 -> 000000000316 -> 790 yen
   (all 0s if staffed gate was involved during entry or exit)