Serial Ports

By pcdoctor1
Feb 22, 2010
  1. Hi everyone new to this site well i have installed 2 serial ports into a machine using a pci card running on windows xp the ports are used to run sewing machines well i got a old machine and a new one i plug the both in and the old one runs perfect but the new one will run but it fails alot i can send the data to it sometimes and it runs and sometimes it dont well it aint the software setting or the sewing machine becasue they run on other computers so i am guessing there is a fault with the com setting as they read irq setting 21 anyone got any ideas thanx...
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