DTK Computers

     Technical Information Sheet for PTI-227B
     S=shorted, O=open             DIP switch 1=on 0=off

     JP2:HD Activity Light         JP3:Printer Port 
        <1> Vcc                        S Output
        <2> Activity                   O Input/Output
        <3> Activity               
        <4> Vcc                    
                                       
     JP2:I/O Address (H=top two pins L=bottom two pins)
         Blocks   Address   Blocks   Address   Blocks   Address
         1 2 Serial Port 1  3 4 Serial Port 2  5 6 Parallel Port 
         L L COM4(2E8h)     L L COM3(2E8h)     L L LPT3(3BCh)
         L H COM1(3F8h)     L H COM2(2F8h)     L H LPT2(278h)
         H L COM3(3E8h)     H L COM4(3E8h)     H L LPT1(378h)
         H H disable        H H disable        H H disable

     JP4-1:HD Address Select       JP4-2:IDE Enable
         H 3F6-3F7,1F0-1F7             H Disable IDE
         L 376-377,170-177             L Enable IDE

     JP7-3:FD Address Select       JP7-4:FDC Enable
         H 3F0-3F7                     H Disable FDC
         L 370-377                     L Enable FDC

     J5: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