J28 Serial Port 2 Irq Select - American Megatrends Super Voyager VLB-III User Manual

Step 2 Set Switch and Jumper Options,
Continued
SW1
SW1 is a four-position two-bit DIP switch that controls cache memory configuration. See the graphic on
page 32 for the location of SW1.
SW1 Switches Cache Memory Configured
All OFF 64 KB
All ON 256 KB
J26 Diag
J26 is the Manufacturing Diagnostics jumper. The motherboard is shipped with J26 OPEN. J26 should
remain OPEN.

J28 Serial Port 2 IRQ Select

J28 is a three-pin single-inline berg. Short pins 2-3 to select IRQ4 for serial port 2. Short pins 1-2 (the
default) to select IRQ3 for serial port 2.
Chapter 2 Installation
34