DTK Computers

     Technical Information Sheet for PTI-222                     Page 1
     S=shorted, O=open             DIP switch 1=on 0=off

     Data Jumper Block J1 
      Pin Pair  Default Status  Function
        1               On      Disables data transfer in DMA.
                *       Off     Enables data transfer in DMA.
        2       *       On      Enables boot up process.
                        Off     Disables boot up process.
        3       *       Off     Display message.
        4       *       Off     Display message.
        5       *       On      Board initiates Synchronous Negotiation.
                        Off     Board does not initiate Synchronous Negotiation.
        6       *       On      Allows disconnect by peripheral device.
                        Off     Does not allow disconnect.
        7       *       Off     Reversed.
        8       *       Off     Reversed.

      Messages                            PIN 
        0 - DTK header                     3   4   Messages Enabled
        1 - Jumper configuration info      Off Off #0 #4
        2 - SCSI device info               Off On  #0 #3 #4
        3 - Boot progress report           On  Off #0 #1 #2 #3 #4
        4 - Error message                  On  On  #4

     Data Jumper Block J2  
      Pin Pair                     Pin Pair
       1  2  3  SCSI ID               4  5  IRQ
       O  O  O   0                    O  O    9
       S  O  O   1                    S  O   10 
       O  S  O   2                    O  S   11 (Default)
       S  S  O   3                    S  S   12
       O  O  S   4           
       S  O  S   5                 Pin Pair
       O  S  S   6                    6  7  DMA Channel  
       S  S  S   7 (Default)          O  O  0 (Default)
                                      S  O  5
      Pin Pair 8                      O  S  6
       O SCSI bus Parity checking     S  S  7
       S No SCSI bus Parity Checking

     Data Jumper Block J3 
       Selects DACK and DRQ channel, this channel must match channel
       selected in J2 6&7
      Pin Pair                     Pin Pair
       1 2 3 4 DRQ                  5 6 7 8 DACK
       S O O O  7                   S O O O  7
       O S O O  6                   O S O O  6
       O O S O  5                   O O S O  5
       O O O S  0 (Default)         O O O S  0 (Default)

     Data Jumper Block J4
      Pin Pair                     Pin Pair 5 Address
       1 2 3 4 IRQ                  O  340h
       S O O O 12                   S  140h (Special BIOS needed)
       O S O O 11 (Default)
       O O S O 10                  Pin Pair  BIOS
       O O O S  9                     6 7   Address
                                      O O   C8000
      Pin Pair 8                      O S   CC000
       O BIOS address disabled        S O   D8000
       S BIOS address enabled         S S   DC000 (Default)
     

     DTK Computers

     Technical Information Sheet for PTI-222                     Page 2
     S=shorted, O=open             DIP switch 1=on 0=off

     J7:Activity LED               J8:Zero Wait State
        <1> Vcc                       O Disabled
        <2> Active                    S Enabled
        <3> Active
        <4> Vcc