Port Address Decode Configuration Config Switch COM Port B COM Port A # Position Address Hex Address Hex 8 7 1 _________________________________________________ 0 ON ON ON COM1(3F8) ---- 1 ON ON OFF ---- COM2(2F8) 2 ON OFF ON COM1(3F8) COM2(2F8) 3 ON OFF OFF COM3(2A0) COM4(2A8) 4 OFF ON ON COM5(2B0) COM6(2B8) 5 OFF ON ON COM7(1A0) COM8(1A8) 6 OFF OFF ON COM9(1B0) COM10(1B8) 7 OFF OFF OFF COM11(290) COM12(298) Interupt Selection Switch Position Status 6 5 4 3 2 __________________________________________________________ OFF OFF OFF OFF OFF Shared interupts disabled ** OFF OFF OFF OFF ON IRQ-2 Selected for shared interrupt OFF OFF OFF ON OFF IRQ-3 Selected for shared interrupt OFF OFF ON OFF OFF IRQ-4 Selected for shared interrupt OFF ON OFF OFF OFF IRQ-5 Selected for shared interrupt ON OFF OFF OFF OFF IRQ-6 Selected for shared interrupt ** For address decode confguration 0 through 2, shared interupts are not allowed; therfore switch1, postions 2 through 6, should be OFF. Configuration Jumpers ____________________________ Port A Jumper Mode E5 to E6 RS232 Selected Port B Jumper Mode E2 to E3 RS232 Selected Communication Port Address Decode Switch 1 COM Port B COM Port A Interrupt Support Position Address Address COM B COM A Combined _________________________________________________________________ 8 7 1 0 0 0 3F8-3FF ------- IRQ-4 ----- ------ 0 0 1 ------- 2F8-2FF ----- IRQ-3 ------ 0 1 0 3F8-3FF 2F8-2FF IRQ-4 IRQ-3 ------ 0 1 1 2A0-2A7 2A8-2AF ----- ----- IRQ-2-IRQ-6 1 0 0 2B0-2B7 2B8-2BF ----- ----- IRQ-2-IRQ-6 1 0 1 1A0-1A7 1A8-1AF ----- ----- IRQ-2-IRQ-6 1 1 0 1B0-1B7 1B8-1BF ----- ----- IRQ-2-IRQ-6 1 1 1 290-297 298-29F ----- ----- IRQ-2-IRQ-6