A while back, I asked about how to get a PC to read the 9th bit in Mode 2/3: Multiprocessor Serial bus format.

I need to be able to detect the state of the 9th bit for each received byte

Mahmood Elnasser suggested the cport library: http://www2.arnes.si/~sopecrni/downloads/CPort263.zip

I've downloaded this, and it doesn't look like it'll do the job :-(
(It looks like it'll have the same problem as AsyncPro)

The OnRxChar Event could return any number of characters, but the LastErrors Method - as its name suggests - only tells me what the last error was; ie, I can't tell which of the received bytes had the 9th bit set (Parity error).

Any help would be greatly appreciated.

I'm currently looking around at direct IO drivers for Windows

(yes, I know it'd be a doddle in MS-DOS).