386DX WBC 2025 Motherboard Settings and Configuration

Processor	80386DX
Processor Speed	25/33MHz
Chip Set	OPTI
Max. Onboard DRAM	32MB
Cache	64KB
BIOS	AMI
Dimensions	330mm x 218mm
I/O Options	32-bit external memory card slot
NPU Options	80387/3167

CONNECTIONS
Purpose	Location	Purpose	Location
Turbo switch	J5	External battery	J10
Reset switch	J6	Turbo LED	JP4
Speaker	J7	32-bit external memory card	S1
Power LED & keylock	J8

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Monitor type select color	JP1	Closed
	Monitor type select monochrome	JP1	Open
»	CMOS memory normal operation	JP2	pins 2 & 3 closed
	CMOS memory clear	JP2	pins 1 & 2 closed
»	Factory configured - do not alter	JP3	Closed
»	Factory configured - do not alter	JP5	pins 2 & 3 closed
»	Factory configured - do not alter	JP6	pins 1 & 2 closed
»	Factory configured - do not alter	JP7	pins 1 & 2 closed
»	Factory configured - do not alter	JP8	pins 1 & 2 closed
»	Factory configured - do not alter	JP9	pins 2 & 3 closed
»	Factory configured - do not alter	JP10	pins 1 & 2 closed
	Note : The locations of jumpers JP3, JP5, JP6, JP7, JP8, JP9 and JP10 are unidentified.

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

CACHE CONFIGURATION
Size	Bank 0	TAG (U1)	TAG (U2 & U3)
64KB	(8) 8K x 8	(1) 16K x 4	(2) 4K x 4