Well, it works! All I had to do was add these few lines :

MOV TMOD,#21H ;mode 2 for T1, mode 1 for T0
MOV TCON,#50H
MOV TH1,#0253 ;reload value @ 11.059MHz
MOV PCON,#0 ;for 9600

Now I have a neat GSM-sized 6-button keyboard for setting up the parameters on our parking terminals. This replaces a laptop at a fraction of the cost.

Thanks again to Michael & the others for making me think clearly!

Regards,

Richard