VESA X86VLWB Motherboard Settings and Configuration

Processor	80386DX/80486SX/80486DX/80486DX2
Processor Speed	25/33/40/50(internal)/66(internal)MHz
Chip Set	Intel
Max. Onboard DRAM	32MB
Cache	64/128/256KB
BIOS	AMI
Dimensions	330mm x 218mm
I/O Options	32-bit VESA local bus slots (2)
NPU Options	80387DX

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	J1	Turbo LED	JP32
Power LED & keylock	J19	32-bit VESA Local bus slots	SL1, SL2
Speaker	J20	Reset switch	SW1
Turbo switch	JP31

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	CMOS normal operation	JP1	pins 2 & 3 closed
	CMOS memory clear	JP1	pins 1 & 2 closed
	Bus speed select - Clock/5	JP3	Closed
	Bus speed select - Clock/4	JP3	Open
»	Monitor type select monochrome	JP4	Closed
	Monitor type select color	JP4	Open
»	Factory configured - do not alter	JP16	Open
	Enable 486SX PQFP	JP17	Open
	Disable 486SX PQFP	JP17	Closed
	Enable 386DX PQFP	JP18	Open
	Disable 386DX PQFP	JP18	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
8MB	(4) 1M x 9	(4) 1M x 9
16MB	(4) 4M x 9	NONE
20MB	(4) 1M x 9	(4) 4M x 9
20MB	(4) 4M x 9	(4) 1M x 9
32MB	(4) 4M x 9	(4) 4M x 9

PROCESSOR TYPE CONFIGURATION
Type	JP2	JP6	JP7
Cyrix	Closed	Closed	Closed
Intel/AMD	Open	Open	Open

CPU TYPE CONFIGURATION
Type	JP5	JP12
80386	pins 2 & 3 closed	Closed
80486	pins 1 & 2 closed	Open

CPU CLOCK CONFIGURATION
Type	Speed	JP25	JP33
80386DX	25MHz	pins 2 & 3 closed	pins 1 & 2 closed
80386DX	33MHz	pins 2 & 3 closed	pins 1 & 2 closed
80486SX	25MHz	pins 2 & 3 closed	pins 2 & 3 closed
80486SX	33MHz	pins 2 & 3 closed	pins 2 & 3 closed
80486DX	33MHz	pins 2 & 3 closed	pins 2 & 3 closed
80486DX	50MHz	pins 1 & 2 closed	pins 1 & 2 closed
80486DX2	50iMHz	pins 1 & 2 closed	pins 1 & 2 closed
80486DX2	66iMHz	pins 2 & 3 closed	pins 2 & 3 closed

486 PROCESSOR CONFIGURATION
Type	JP35	JP36	JP37
80486SX	pins 2 & 3 closed	Open	pins 2 & 3 closed
80486DX	pins 1 & 2 closed	Closed	pins 1 & 2 closed
80486DX2	pins 1 & 2 closed	Closed	pins 1 & 2 closed

CACHE CONFIGURATION
Size	Bank 0	Bank 1	TAG (U39)	TAG (U40)
64KB	(4) 8K x 8	(4) 8K x 8	(1) 8K x 8	NONE
128KB	(4) 32K x 8	NONE	(1) 8K x 8	NONE
256KB	(4) 32K x 8	(4) 32K x 8	(1) 8K x 8	(1) 8K x 8

CACHE JUMPER CONFIGURATION
Size	JP10	JP11	JP13	JP15
64KB	pins 2 & 3 closed	Open	Open	Open
128KB	pins 2 & 3 closed	Closed	Closed	Open
256KB	pins 1 & 2 closed	Closed	Closed	Closed

VESA CPU TYPE CONFIGURATION
CPU Type	JP30	JP34
80386	pins 2 & 3 closed	pins 1 & 2 closed
80486	pins 1 & 2 closed	pins 2 & 3 closed

VESA WAIT STATE CONFIGURATION
CPU speed	Wait states	JP22	JP26
< 33MHz	0 wait states	Open	Open
> 33MHz	1 wait states	Closed	Closed

MISCELLANEOUS TECHNICAL NOTES

Note:The VESA bus can be disabled by removing two integrated chips (IC) off the system board.

To disable the VESA bus, ICs located on U29 and U38 must be removed and the following

jumpers must be installed: JP8, JP9, JP14, JP19, JP21, JP23, JP24, JP27.

To enable the VESA bus, insert two ICs at U29 and U38. And all jumpers in above paragraph

must be open.

Some system boards may have a clock generating device which must be set to generate the

proper clock speed for the CPU. Jumpers JP28 and JP29 are used to set the clock frequency

the device should generate. In most systems, this device is replaced with an oscillator.