CQH486V VESA Motherboard Settings and Configuration

Processor	80486SX/80486DX/80486DX2
Processor Speed	20/25/33/50(internal)/50/66(internal)
Chip Set	UNI
Max. Onboard DRAM	32MB
SRAM Cache	64/128/256KB
BIOS	AMI
Dimensions	280mm x 220mm
I/O Options	32-bit VESA card slot (2)
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	JP17	Turbo LED	TLED
Power LED & keylock	KEYL	Turbo switch	TSW
Reset switch	RSW	32-bit VESA card	S1
Speaker	SPK	32-bit VESA card	S2

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Monitor type select color	JP12	open
	Monitor type select monochrome	JP12	closed
»	CMOS memory normal operation	JP16	pins 1 & 2 closed
	CMOS memory clear	JP16	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
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 TYPE CONFIGURATION
Type	Jumper JP2	Jumper JP3
80486DX2 (PGA)	pins 1 & 2 and 3 & 4 closed	pins 2 & 3 closed
80486DX (PGA)	pins 1 & 2 and 3 & 4 closed	pins 2 & 3 closed
80486SX (PGA)	pins 2 & 3 closed	open
80486SX (PQFP)	open	open

CPU SPEED CONFIGURATION
Speed	ID2	ID3	JP33	JP72	JP100	JP101
66MHz (internal)	closed	closed	pins 2 & 3	open	closed	pins 2 & 3
50MHz	closed	closed	pins 1 & 2	open	open	pins 2 & 3
50 MHz (internal)	closed	open	pins 2 & 3	closed	open	pins 1 & 2
33MHz	closed	closed	pins 2 & 3	open	closed	pins 2 & 3
25MHz	closed	open	pins 2 & 3	closed	open	pins 1 & 2

SRAM JUMPER CONFIGURATION
Size	Jumper JP7	Jumper JP8
64KB	pins 2 & 3 closed	open
128KB	pins 1 & 2 closed	pins 2 & 3 closed
256KB	pins 1 & 2 closed	pins 1 & 2 closed

SRAM CONFIGURATION
Size	Cache SRAM	Location	TAG
64KB	(8) 8K x 8	Banks 0 & 1	(1) 8K x 8
128KB	(4) 32K x 8	Bank 0	(1) 8K x 8
256KB	(8) 32K x 8	Banks 0 & 1	(1) 32K x 8