DTK Computers Technical Information Sheet for PTI-227 S=shorted, O=open DIP switch 1=on 0=off *=default JP2:HD Activity Light JP3:# of HDD's <1> Vcc S One HDD* <2> Activity O Two HDD's <3> Activity <4> Vcc JP4:Printer Port S Output* JP5:IBM BIOS O Input 1-2 S Other BIOS 2-3 O IBM BIOS* JP6:I/O Address (U=top two pins D=bottom two pins) Blocks Address Blocks Address Blocks Address 1 2 Serial Port 1 3 4 Serial Port 2 5 6 Parallel Port D D COM4(2E8h) D D COM3(2E8h) D U LPT2(278h) D U COM1(3F8h)* D U COM2(3F8h)* U D LPT1(378h)* U D COM3(3E8h) U D COM4(3E8h) U U disable U U disable U U disable JP7-1:HD Address Select JP7-2:Drive Change 1-2 S 3F6-3F7,1F0-1F7* 1-2 S Change A: and B: 2-3 S 376-377,170-177 2-3 S Normal operation* JP7-3:FD Address Select JP7-4:IDE HD Enable 1-2 S 3F0-3F7* 1-2 S Disable IDE 2-3 S 370-377 2-3 S Enable IDE* JP7-5:FDC Enable JP7-6:XT/AT Select 1-2 S Disable FDC 1-2 S PC/XT 2-3 S Enable FDC* 2-3 S PC/AT* JP8:IRQ Select 1 2 3 Serial Port 1 4 5 6 Serial Port 2 7 8 Parallel Port S O O IRQ 4* S O O IRQ 3* S O IRQ 7* O S O IRQ 3 O S O IRQ 4 O S IRQ 5 O O S IRQ 5 O O S IRQ 5