486VC-H (REV. A1) Motherboard Settings and Configuration

Processor	80486SX/80487SX/80486DX/80486DX2
Processor Speed	16/20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set	VT
Max. Onboard DRAM	128MB
SRAM Cache	64/128/256KB
BIOS	Award
Dimensions	289.8mm x 218.4mm
I/O Options	None
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
Turbo LED	J6	Speaker	J9
Turbo switch	J7	Power LED & keylock	J10
Reset switch	J8

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	CMOS memory normal operation	J1	open
	CMOS memory clear	J1	closed
»	Monitor type select monochrome	J2	open
	Monitor type select color	J2	closed
»	CPU speed select OSC1/1	JK1 & JK2	pins 2 & 3 closed
	CPU speed select OSC1/2	JK1 & JK2	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) 256K x 9	(4) 1M x 9
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) 256K x 9	(4) 4M x 9
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
64MB	(4) 16M x 9	NONE
65MB	(4) 16M x 9	(4) 256K x 9
68MB	(4) 16M x 9	(4) 4M x 9
80MB	(4) 16M x 9	(4) 4M x 9
128MB	(4) 16M x 9	(4) 16M x 9

SRAM CONFIGURATION
Size	Cache SRAM	Location	TAG/Dirty Bit	JS1	JS2
64KB	(8) 8K x 8	Banks 0 & 1	(2) 8K x 8	pins 1 & 2	pins 1 & 2
128KB	(4) 32K x 8	Bank 0	(2) 8K x 8	pins 1 & 2	pins 2 & 3
256KB	(8) 32K x 8	Banks 0 & 1	(2) 32K x 8	pins 2 & 3	pins 2 & 3
Note:Pins designated should be in the closed position.

CPU TYPE CONFIGURATION
CPU Type	JC1	JC2	JC3
80486DX2	pins 1 & 2 closed	pins 1 & 2 closed	pins 1 & 2 closed
80486DX	pins 1 & 2 closed	pins 1 & 2 closed	pins 1 & 2 closed
80487SX	pins 1 & 2 closed	pins 1 & 2 closed	pins 2 & 3 closed
80486SX	pins 2 & 3 closed	pins 2 & 3 closed	open