STB SYSTEMS, INC. DSP 550 Card Type Multi I/O Card Chip Set Unidentified Maximum Onboard Memory N/A I/O Options Parallel port, serial ports (2) Data Bus 8-bit ISA [Image] CONNECTIONS Function Label Function Label Serial port 1 CN1 Parallel port CN3 Serial port 2 CN2 USER CONFIGURABLE SETTINGS Function Label Position » Ring indicator signal supplied to W1 Pins 1 & 2 serial port 1 closed +5 volt signal supplied to serial W1 Pins 3 & 4 port 1 closed » Ring indicator signal supplied to W2 Pins 1 & 2 serial port 2 closed +5 volt signal supplied to serial W2 Pins 3 & 4 port 2 closed Note: Jumpers W1 and W2 are used for ensuring compatibility with specialty serial devices and older mouse systems. PARALLEL PORT ADDRESS SELECTION Setting J11 J12 278h Pins 1 & 2 closed Pins 2 & 3 closed 378h Pins 1 & 2 closed Pins 1 & 2 closed Disabled Pins 2 & 3 closed Pins 2 & 3 closed SERIAL PORT 1 ADDRESS SELECTION Setting J7 J8 2F8h Pins 2 & 3 closed Pins 1 & 2 closed 3E8h Pins 1 & 2 closed Pins 2 & 3 closed » 3F8h Pins 1 & 2 closed Pins 1 & 2 closed Disabled Pins 2 & 3 closed Pins 2 & 3 closed SERIAL PORT 2 ADDRESS SELECTION Setting J9 J10 2E8h Pins 1 & 2 closed Pins 2 & 3 closed » 2F8h Pins 1 & 2 closed Pins 1 & 2 closed 3E8h Pins 2 & 3 closed Pins 1 & 2 closed Disabled Pins 2 & 3 closed Pins 2 & 3 closed SERIAL PORT 1 INTERRUPT SELECTION IRQ J2 J3 IRQ2 Open Pins 1 & 2 closed IRQ3 Pins 1 & 2 closed Open » IRQ4 Pins 2 & 3 closed Open IRQ5 Open Pins 2 & 3 closed SERIAL PORT 2 INTERRUPT SELECTION IRQ J4 J5 IRQ2 Open Pins 1 & 2 closed » IRQ3 Pins 1 & 2 closed Open IRQ4 Pins 2 & 3 closed Open IRQ5 Open Pins 2 & 3 closed PARALLEL PORT INTERRUPT SELECTION IRQ J1 » IRQ7 Pins 1 & 2 closed IRQ5 Pins 2 & 3 closed PARALLEL PORT MODE SELECTION Setting J6 Uni-directional Pins 2 & 3 open Bi-Directional (EPP/ECP) Pins 2 & 3 closed