
STB SYSTEMS, INC.

4-COM

Card Type   Serial
Chip Set    Unidentified
I/O Options Serial ports (4)
Data Bus    16-bit ISA

[Image]

                                CONNECTIONS

          Function             Label           Function             Label

  Serial port 1                 P1     Serial port 3                 P3

  Serial port 2                 P2     Serial port 4                 P4

                 SERIAL PORT 1 IRQ JUMPER BLOCK SELECTION

          Setting                    J33                     J34

         Jumper set 1        Pins 2 & 3 closed       Pins 2 & 3 closed

          Jumper set 2        Pins 1 & 2 closed       Pins 2 & 3 closed

          Jumper set 3        Pins 2 & 3 closed       Pins 1 & 2 closed

          Jumper set 4        Pins 1 & 2 closed       Pins 1 & 2 closed

                 SERIAL PORT 2 IRQ JUMPER BLOCK SELECTION

          Setting                    J35                     J36

          Jumper set 1        Pins 2 & 3 closed       Pins 2 & 3 closed

         Jumper set 2        Pins 1 & 2 closed       Pins 2 & 3 closed

          Jumper set 3        Pins 2 & 3 closed       Pins 1 & 2 closed

          Jumper set 4        Pins 1 & 2 closed       Pins 1 & 2 closed

                 SERIAL PORT 3 IRQ JUMPER BLOCK SELECTION

          Setting                    J37                     J38

          Jumper set 1        Pins 2 & 3 closed       Pins 2 & 3 closed

          Jumper set 2        Pins 1 & 2 closed       Pins 2 & 3 closed

         Jumper set 3        Pins 2 & 3 closed       Pins 1 & 2 closed

          Jumper set 4        Pins 1 & 2 closed       Pins 1 & 2 closed

                 SERIAL PORT 4 IRQ JUMPER BLOCK SELECTION

          Setting                    J39                     J40

          Jumper set 1        Pins 2 & 3 closed       Pins 2 & 3 closed

          Jumper set 2        Pins 1 & 2 closed       Pins 2 & 3 closed

          Jumper set 3        Pins 2 & 3 closed       Pins 1 & 2 closed

         Jumper set 4        Pins 1 & 2 closed       Pins 1 & 2 closed

                          INTERRUPT JUMPER SET 1

      Setting           J25           J26           J27           J28

        IR/FONT>     Pins 1 & 2       Open         Open          Open
                       closed

          IRQ3       Pins 2 & 3       Open         Open          Open
                       closed

         IRQ4          Open       Pins 1 & 2      Open          Open
                                     closed

          IRQ5          Open       Pins 2 & 3      Open          Open
                                     closed

         IRQ10          Open          Open       Pins 1 & 2      Open
                                                  closed

         IRQ11          Open          Open       Pins 2 & 3      Open
                                                  closed

         IRQ12          Open          Open         Open        Pins 1 & 2
                                                                closed

         IRQ15          Open          Open         Open        Pins 2 & 3
                                                                closed

                          INTERRUPT JUMPER SET 2

      Setting           J17           J18           J19           J20

        IR/FONT>     Pins 1 & 2       Open         Open          Open
                       closed

         IRQ3       Pins 2 & 3       Open         Open          Open
                       closed

          IRQ4          Open       Pins 1 & 2      Open          Open
                                     closed

          IRQ5          Open       Pins 2 & 3      Open          Open
                                     closed

         IRQ10          Open          Open       Pins 1 & 2      Open
                                                  closed

         IRQ11          Open          Open       Pins 2 & 3      Open
                                                  closed

         IRQ12          Open          Open         Open        Pins 1 & 2
                                                                closed

         IRQ15          Open          Open         Open        Pins 2 & 3
                                                                closed

                          INTERRUPT JUMPER SET 3

      Setting            J9           J10           J11           J12

        IR/FONT>     Pins 1 & 2       Open         Open          Open
                       closed

          IRQ3       Pins 2 & 3       Open         Open          Open
                       closed

          IRQ4          Open       Pins 1 & 2      Open          Open
                                     closed

         IRQ5          Open       Pins 2 & 3      Open          Open
                                     closed

         IRQ10          Open          Open       Pins 1 & 2      Open
                                                  closed

         IRQ11          Open          Open       Pins 2 & 3      Open
                                                  closed

         IRQ12          Open          Open         Open        Pins 1 & 2
                                                                closed

         IRQ15          Open          Open         Open        Pins 2 & 3
                                                                closed

                          INTERRUPT JUMPER SET 4

     Setting           J1            J2            J3             J4

                  Pins 1 & 2       Open          Open           Open
                     closed

        IRQ3       Pins 2 & 3       Open          Open           Open
                     closed

        IRQ4          Open       Pins 1 & 2       Open           Open
                                   closed

        IRQ5          Open       Pins 2 & 3       Open           Open
                                   closed

        IRQ10         Open          Open        Pins 1 & 2       Open
                                                 closed

        IRQ11         Open          Open        Pins 2 & 3       Open
                                                 closed

        IRQ12         Open          Open          Open        Pins 1 & 2
                                                                closed

        IRQ15         Open          Open          Open        Pins 2 & 3
                                                                closed

                           SERIAL PORT 1 ADDRESS

      Setting           J29           J30           J31           J32

     COM1: (3F8h)      Open          Open         Open        Pins 1 & 2
                                                                closed

      COM2: (2F8h)      Open          Open       Pins 1 & 2      Open
                                                  closed

      COM3: (3E8h)      Open          Open         Open        Pins 2 & 3
                                                                closed

      COM4: (2E8h)      Open          Open       Pins 2 & 3      Open
                                                  closed

          1A8h       Pins 2 & 3       Open         Open          Open
                       closed

          1E8h          Open       Pins 2 & 3      Open          Open
                                     closed

          1F8h          Open       Pins 1 & 2      Open          Open
                                     closed

          2A8h       Pins 1 & 2       Open         Open          Open
                       closed

        Disabled        Open          Open         Open          Open

                           SERIAL PORT 2 ADDRESS

      Setting           J21           J22           J23           J24

      COM1: (3F8h)      Open          Open         Open        Pins 1 & 2
                                                                closed

     COM2: (2F8h)      Open          Open       Pins 1 & 2      Open
                                                  closed

      COM3: (3E8h)      Open          Open         Open        Pins 2 & 3
                                                                closed

      COM4: (2E8h)      Open          Open       Pins 2 & 3      Open
                                                  closed

          1A8h       Pins 2 & 3       Open         Open          Open
                       closed

          1E8h          Open       Pins 2 & 3      Open          Open
                                     closed

          1F8h          Open       Pins 1 & 2      Open          Open
                                     closed

          2A8h       Pins 1 & 2       Open         Open          Open
                       closed

        Disabled        Open          Open         Open          Open

                           SERIAL PORT 3 ADDRESS

      Setting           J13           J14           J15           J16

      COM1: (3F8h)      Open          Open         Open        Pins 1 & 2
                                                                closed

      COM2: (2F8h)      Open          Open       Pins 1 & 2      Open
                                                  closed

     COM3: (3E8h)      Open          Open         Open        Pins 2 & 3
                                                                closed

      COM4: (2E8h)      Open          Open       Pins 2 & 3      Open
                                                  closed

          1A8h       Pins 2 & 3       Open         Open          Open
                       closed

          1E8h          Open       Pins 2 & 3      Open          Open
                                     closed

          1F8h          Open       Pins 1 & 2      Open          Open
                                     closed

          2A8h       Pins 1 & 2       Open         Open          Open
                       closed

        Disabled        Open          Open         Open          Open

                           SERIAL PORT 4 ADDRESS

      Setting            J5            J6           J7            J8

      COM1: (3F8h)      Open          Open         Open        Pins 1 & 2
                                                                closed

      COM2: (2F8h)      Open          Open       Pins 1 & 2      Open
                                                  closed

      COM3: (3E8h)      Open          Open         Open        Pins 2 & 3
                                                                closed

     COM4: (2E8h)      Open          Open       Pins 2 & 3      Open
                                                  closed

          1A8h       Pins 2 & 3       Open         Open          Open
                       closed

          1E8h          Open       Pins 2 & 3      Open          Open
                                     closed

          1F8h          Open       Pins 1 & 2      Open          Open
                                     closed

          2A8h       Pins 1 & 2       Open         Open          Open
                       closed

        Disabled        Open          Open         Open          Open

                       MISCELLANEOUS TECHNICAL NOTE

  To set IRQs for the ports on this board, first set the jumper blocks
  that will set IRQs for each port. This is done by setting jumpers
  referenced in the "Serial Port IRQ Jumper Selection" tables.
  (Interrupts can be shared between two or more ports by setting both
  ports to the same interrupt jumper block. This will leave a jumper
  block unused.) Second, set the interrupts for that jumper block. This
  is done by setting jumpers referenced in the "Interrupt Jumper Set"
  tables.

