Looks a headache case to do, I'll give it a go!!

Thanks for reply. Have tried to boot DOS in DOSbox but can't see how to do it. I usually boot DOS either by clicking on a DOS exe program or from DOS box command prompt in Accessories. Properties wasn't much help in finding the command line ...

I'm trying to run an old DOS Pascal program in the DOSbox of a DEll latitude C800 laptop XP machine. It all works fine except some of the incoming data from the serial port are not displayed because (I think) it needs the time clock from the pc to plot the incoming data against time (so no data …