[flohofwoe]

The parity flag goes all the way back to the Intel 8080 and Z80 (gosh, even the Intel 4004 it seems [2]) and AFAIK was used for error detection when reading data from IO devices [1].

[1] https://en.wikipedia.org/wiki/Parity_bit

[2] https://12ft.io/proxy?q=https%3A%2F%2Fwww.hackster.io%2FMayu...