PB686 SERIES Motherboard Settings and Configuration

Processor	80286
Processor Speed	12MHz
Chip Set	C & T
Max. Onboard DRAM	1MB
Cache	None
BIOS	Phoenix
Dimensions	330mm x 218mm
I/O Options	Serial ports (2), parallel port, floppy interface
NPU Options	80287

CONNECTIONS
Purpose	Location	Purpose	Location
Speaker	J2	Floppy interface	J9
Turbo LED	J3	Parallel port	P1
Reset switch	J4	Serial port (25-pin)	P2
External battery	J5	Serial port (9-pin)	P3

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Factory configured - do not alter	JP1	pins 1 & 2 closed
»	Monitor type select color	JP2	pins 2 & 3 closed
	Monitor type select monochrome	JP2	pins 1 & 2 closed

DRAM CONFIGURATION
Size	Piggyback board (PB1)	Bank 0 (B0)	Parity 0 (P0)	Bank 1 (B1)	Parity 1 (P1)
640KB	(4) 4464 +(2) 4164	(4) 44256	(2) 41256	NONE	NONE
1MB	NONE	(4) 44256	(2) 41256	(4) 44256	(2) 41256

DRAM JUMPER CONFIGURATION
Size	JP5
640KB	Closed
1MB	Open

PARALLEL PORT CONFIGURATION
Port	JP23	JP27
LPT1	pins 2 & 3 closed	pins 2 & 4 closed
LPT2	pins 1 & 2 closed	pins 1 & 3 closed

SERIAL PORT CONFIGURATION
P2	P3	JP24	JP33
COM1	COM2	pins 1 & 3, 2 & 4 closed	pins 1 & 3, 2 & 4 closed
COM2	COM1	pins 1 & 2, 3 & 4 closed	pins 1 & 2, 3 & 4 closed
COM1	Disabled	pins 2 & 4 closed	pins 1 & 3 closed
COM2	Disabled	pins 1 & 2 closed	pins 1 & 2 closed
Disabled	COM 1	pins 3 & 4 closed	pins 3 & 4 closed
Disabled	COM2	pins 1 & 3 closed	pins 2 & 4 closed