Parity Checking in CPUs (was: Byte sizes...

[William Donzelli]

> Yes, the 8080/8085/8086 series chips did parity checking. The PSW had a flag
> for odd/even parity. Naturally, the Z80, being a superset of the 8080, also had this
> ability. I assume that the later generations of x86 series chips, for backward compatability,
> also had the ability to check for parity.
> 
> The TMS9900 series also did parity checking.

Did anyone really use these features much? It sort of sounds like a waste
of gates, since most serial I/O parity is done by the UART.

William Donzelli
aw288 at osfn.org