PB25/PB33 Motherboard Settings and Configuration

Processor	80386DX
Processor Speed	25/33MHz
Chip Set	VLSI
Max. onboard DRAM	32MB
Cache	None
BIOS	Phoenix
Dimensions	340mm x 240mm
I/O Options	32-bit expansion slot, floppy drive interface, IDE interface, keyboard, parallel port, serial port (2)
NPU Options	80387DX

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	JBT	Keylock	JKL
Serial port 1	JCOM1	Parallel port	JLPT
Serial port 2	JCOM2	Reset	JRS
Floppy drive interface	JFDD	Speaker	JSP
IDE interface	JHDD	Turbo LED	JTB
IDE interface LED	JHDI	32-bit expansion slot	S1
Keyboard	JKB

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Onboard floppy drive interface enabled	JFDC	Closed
	Onboard floppy drive interface disabled	JFDC	Open
»	Onboard IDE interface enabled	JHDC	Closed
	Onboard IDE interface disabled	JHDC	Open
»	BIOS type select 27256	JROM	Open
	BIOS type select 27512	JROM	Closed
»	Monitor type select color	JVD	pins 2 & 3 closed
	Monitor type select monochrome	JVD	pins 1 & 2 closed

SERIAL PORT CONFIGURATION
Port 1 (JCOM1)		Port 2 (JCOM2)	JC1S	JC2S
	COM1	COM2	Closed	Closed
»	COM1	Disabled	Closed	Open
	Disabled	COM2	Open	Closed
	Disabled	Disabled	Open	Open

PARALLEL PORT CONFIGURATION
LPT		IRQ	JLPS	JLRQ
»	LPT1	IRQ7	pins 1 & 2 closed	pins 1 & 2 closed
	LPT1	IRQ5	pins 1 & 2 closed	pins 2 & 3 closed
	LPT2	IRQ7	pins 2 & 3 closed	pins 1 & 2 closed
	LPT2	IRQ5	pins 2 & 3 closed	pins 2 & 3 closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1
1MB	(4) 256K x 9	NONE
2MB	(4) 256K x 9	(4) 256K x 9
4MB	(4) 1M x 9	NONE
5MB	(4) 1M x 9	(4) 256K x 9
8MB	(4) 1M x 9	(4) 1M x 9
16MB	(4) 4M x 9	NONE
17MB	(4) 4M x 9	(4) 256K x 9
20MB	(4) 4M x 9	(4) 1M x 9
32MB	(4) 4M x 9	(4) 4M x 9