PB301 (Models: 386SXIIe & 386SXIIes)

Specification

The PB 301 C.1 (20mhz) is wrongly advertised with having a maximum resolution of only 800 x 600 (256K RAM).

Jumpers

Notes -

When replacing the motherboard and installing or removing a modem, ensure that the JMOD connector is configured properly.

Pin one on all jumpers and connectors will always be in the direction of the compass unless otherwise marked on the diagram.

There are three revisions of the PB 301 motherboard. Revision C was the only 301 used in multimedia systems.

There are three revisions to this motherboard.

Some computers have the game port jumpers reversed (1-2 Enabled 2-3 Disabled).

Built-in video is 1024 x 768 (256Kb or 512Kb)

FunctionJumperDescription
Jfdc (FDC)1-2
2-3
Primary Address
Secondary Address
Jhdc (IDE)1-2
2-3
Primary Address
Secondary Address
Jc13 (COM1/COM3)1-2
2-3
Proprietary Modem in COM1
Proprietary Modem in COM3
Jc24 (COM2/COM4)1-2
2-3
Serial Port is COM2
Serial Port is COM4
Jlps (LPT PORT)1-2
2-3
Select LPT1
Select LPT2
Jlrq (LPT INT)1-2
2-3
LPT uses IRQ5
LPT uses IRQ7
Jinlc (INTERLACED)IN
OUT
Interlaced Monitor
Non-interlaced Monitor
Jmrq (MOUSE INT)IN
OUT
Mouse Port Enabled
Mouse Port Disabled
Jvgas (VGA PORT)1-2
2-3
Built-in VGA Enabled
Built-in VGA Disabled
Jgams (GAME PORT)1-2
2-3
Disabled
Enabled
Jvd (DISPLAY)1-2
2-3
Monochrome Mode
Colour Mode
Jpip (PIPELINE)IN
OUT
Pipelined 80386SX
Non-pipelined
Jspks (SPEAKER)1-2
2-3
Internal Enabled
External Enabled
Jbts (BATTERY)IN
OUT
Internal Enabled
External Enabled

Upgrades