AC 486 PQFP Motherboard Settings and Configuration

Processor	80486SX/80487SX/80486DX/80486DX2
Processor Speed	16/20/25/33/50(internal)/66(internal)MHz
Chip Set	ACC
Video Chip Set	None
Maximum Onboard Memory	32MB
Maximum Video Memory	None
Cache	None
BIOS	AMI
Dimensions	254mm x 218mm
I/O Options	None
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	J1	Reset switch	J4
Turbo LED	J2	Speaker	J5
Turbo switch	J3	Power LED & keylock	J6

USER CONFIGURABLE SETTINGS
Function		Label	Position
	Monitor type select color	JP2	Pins 2 & 3 closed
	Monitor type select monochrome	JP2	Pins 1 & 2 closed
	PQFP CPU disabled	JP3	Closed
	PQFP CPU enabled	JP3	Open

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) 256K x 9	(4) 1M x 9
8MB	(4) 1M x 9	(4) 1M x 9
16MB	(4) 4M x 9	None
20MB	(4) 1M x 9	(4) 4M x 9
32MB	(4) 4M x 9	(4) 4M x 9

CPU SPEED SELECTION
Speed	JP6	JP7	JP8
16MHz	Closed	Closed	Closed
20MHz	Open	Closed	Closed
25MHz	Closed	Open	Closed
33MHz	Closed	Closed	Open
50iMHz	Closed	Open	Closed
66iMHz	Closed	Closed	Open

CPU TYPE SELECTION
Type	JP4	JP5
80486SX	Pins 2 & 3 closed	Pins 2 & 3 closed
80487SX	Pins 1 & 2, 3 & 4 closed	Pins 1 & 2 closed
80486DX	Pins 1 & 2, 3 & 4 closed	Pins 3 & 4 closed
80486DX2	Pins 1 & 2, 3 & 4 closed	Pins 3 & 4 closed