PB 300/320 Motherboard Jumpers Layout

PB 300/320 Motherboard Layout Menu

PB300/320 Jumpers

Note
1. Indicates default settings.
 
2. Some computers have the game port jumpers reversed (1-2 Enabled 2-3 Disabled)
 
3. JLPS, JC24, JHDC, JFDC and JC13 will be obstructed by the internal modem connected to JMOD (if installed).
 
Jfdc (FDC) 1-2 Enabled
2-3 Disabled
Jhdc (IDE) 1-2 Enabled
2-3 Disabled
Jc13 (COM1/COM3) 1-2 Proprietary Modem in COM1
2-3 Proprietary Modem in COM3
Jc24 (COM2/COM4) 1-2 Serial Port is COM2
2-3 Serial Port is COM4
Jlps (LPT PORT) 1-2 Select LPT1
2-3 Select LPT2
Jlrq (LPT INT.) 1-2 LPT uses IRQ5
2-3 LPT uses IRQ7
Jvrq (VGA INT.) In Video uses IRQ9
Out None
Jmrq (MOUSE INT) In Mouse Port uses IRQ12
Out None
Jvgas (VGA PORT) 1-2 Built-in VGA Enabled
2-3 Built-in VGA Disabled
Jgams (GAME PORT) 1-2 Disabled
2-3 Enabled
Jvd (DISPLAY) 1-2 Mono Mode
2-3 Color Mode
Jpip (PIPELINE) In Pipelined 80386
Out Non-pipelined 80386