TANDY 1000 TX (250-1600) Settings Faxback Doc. # 1162 E1-E2 Enables serial port (standard) (remove to disable) E3-E4 Selects the serial port as a COM-1 device (standard) (remove to select serial port as COM-2 device) E9-E10 Selects 640K main memory (standard) (remove to select 768K main memory) E11-E12 Connects printer select signal to parallel port (remove to disable printer select signal) (standard) *NOTE: Jumper locations E5-E6 and E7-E8 do not have staking pins and provide no user options. Switch S-2: #1 OFF Selects composite monochrome monitor ON Selects color RGB monitor (standard) #2 OFF Disables on board interrupt 5 ON Enables on board interrupt 5 (standard) #3 OFF Disables on board interrupt 6 ON Enables on board interrupt 6 (standard) #4 OFF Disables on board interrupt 7 ON Enables on board interrupt 7 (standard) These are user selectable jumper and switch locations.