I/O-4 A <html><strong>JMRI 3.7.1 or later is required to use this definition.</strong></html> <html><h1>I/O Port 4 Lines #1 - #4</h1></html> Tower Controller Mark II Input/Output Port Configuration settings. All numbers are entered as their actual event numbers. For example LS9 is entered as event number 9. Paired inputs or outputs respond only to the first line's event numbers. The second line's event numbers are ignored. IP1 Type IP2 Type IP3 Type IP4 Type