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.