Way back, Steve Taylor wrote:
"You can do it with a PC, you manipulate the parity flag. Its pretty easy to do. I used a Delphi serial port component to get me the necessary functionality."
http://www.8052.com/forum/read.phtml?id=18524&top=

Could you provide a reference for that component?

(I use Borland C++ Builder with Async Pro, but can't see a way to directly control the Parity bit)

Before I get flamed for an off-topic post, I'm trying to make a test harness for an 8051-based (Triscend E5) system which uses this 9-bit multiprocessor bus:
http://www.8052.com/forum/read.phtml?id=18473&top=