Yes,I have NOTEBOOK and adapter USB to RS232.You are rihgt.But,First or other counter port out work diferents than another.Any counter received yours decimal number and work counting.In second solution,if I (examples) send to first counter A10 and he started counting,and in next moment I send second A20,he must make sum nad continue counts to finish.Other works like first..
Thank tou for yours help
Miro245