ADVANTAGE! PLUS SYSTEM BOARD Motherboard Settings and Configuration

Processor	80486SX/80487SX/80486DX/80486DX2
Processor Speed	25/33/50(internal)/66(internal)MHz
Chip Set	VLSI
Max. Onboard DRAM	32MB
Cache	64/256KB
BIOS	AST
Dimensions	330mm x 218mm
I/O Options	Floppy drive interface, IDE interface, parallel port, serial ports (2)
NPU Options	4167

CONNECTIONS
Purpose	Location	Purpose	Location
Parallel port	J1	Turbo LED	JP3
Serial port 2	J2	Reset switch	JP4
Serial port 1	J3	Speaker	JP5
Floppy drive interface	J4	Hard drive LED	JP6
IDE interface	J5	External battery	JP22
Power LED & keylock	JP2

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Monitor type select color	JP1	Closed
	Monitor type select monochrome	JP1	Open
»	I/O bus speed select ATCLK disabled	JP18	Open
	I/O bus speed select ATCLK enabled	JP18	Closed
»	IRQ7 select enabled	JP19	pins 2 & 3 closed
	IRQ5 select enabled	JP19	pins 1 & 2 closed
»	I/O port enabled	JP20	pins 1 & 2 closed
	I/O port disabled	JP20	pins 2 & 3 closed
»	CMOS memory normal operation (Internal Battery)	JP21	pins 2 & 3 closed
	CMOS memory normal operation (External Battery)	JP21	Open
	CMOS memory clear	JP21	pins 1 & 2 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
20MB	(4) 4M x 9	(4) 1M x 9
32MB	(4) 4M x 9	(4) 4M x 9

CACHE CONFIGURATION
Size	Bank 0	Bank 1	TAG/U19	TAG/U20
64KB	(4) 8K x 8	(4) 8K x 8	(1) 8K x 8	NONE
256KB	(4) 32 x 8	(4) 32 x 8	(1) 32 x 8	(1) 64 x 1

CACHE CONFIGURATION
Size	JP7	JP11	JP12	JP13
64KB	Open	Open	Open	Open
256KB	Closed	Closed	Open	Closed

CPU TYPE CONFIGURATION
Type	JP8	JP9	JP10
80486SX	Open	pins 2 & 3 closed	Open
80487SX	pins 2 & 3 closed	pins 1 & 2 closed	Closed
80486DX	pins 1 & 2 closed	pins 1 & 2 closed	Closed
80486DX2	pins 1 & 2 closed	pins 1 & 2 closed	Closed

CPU SPEED CONFIGURATION
Speed	JP14	JP15	JP16	JP17
25MHz	pins 2 & 3 closed	pins 2 & 3 closed	pins 1 & 2 closed	pins 2 & 3 closed
33MHz	pins 2 & 3 closed	pins 1 & 2 closed	pins 1 & 2 closed	pins 2 & 3 closed
50I MHz	pins 2 & 3 closed	pins 2 & 3 closed	pins 1 & 2 closed	pins 2 & 3 closed
66I MHz	pins 2 & 3 closed	pins 1 & 2 closed	pins 1 & 2 closed	pins 2 & 3 closed