I need to support a legacy custom printer driver app in Pascal which used to directly access the old style serial ports on Mac OS 9. I need to get it running from OS X since it is used for point of sale invoice printing. The computers have been upgraded.

I have the Keyspan USA28x USB to 8 pin mini din adapter, and have their test program working but now I need to either call their C routines somehow, or rewrite something similar in Pascal. I also have most of the legacy Pascal code compiling, except for the serial stuff.

Can anyone point me to appropriate examples on how to do serial drive using Xcode and gpc?

Thx for any pointers. Ken