MB386DX-33/40 Motherboard Settings and Configuration

Processor	80386DX
Processor Speed	33/40MHz
Chip Set	Forex
Max. Onboard DRAM	32MB
Cache	32/64/128KB
BIOS	AMI
Dimensions	330mm x 218mm
I/O Options	32-bit external memory card
NPU Options	80387/3167

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	JP2	Speaker	JP10
Turbo LED	JP7	Turbo switch	JP11
Reset switch	JP8	32-bit external memory card	S1
Power LED & keylock	JP9

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Monitor type select color	JP3	Open
	Monitor type select monochrome	JP3	Closed
»	NPU mode select synchronous with CPU	JP5	pins 1 & 2 closed
	NPU mode select synchronous with oscillator installed at Y1	JP5	pins 2 & 3 closed
»	External battery select 6VDC	JP200	Open
	External battery select 3.6VDC	JP200	Closed
»	CMOS memory normal operation	JP202	Open
	CMOS memory clear	JP202	Closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
1MB	(4) 256K x 9	NONE	NONE	NONE
2MB	(4) 256K x 9	(4) 256K x 9	NONE	NONE
4MB	(4) 1M x 9	NONE	NONE	NONE
5MB	(4) 256K x 9	(4) 1M x 9	NONE	NONE
6MB	(4) 256K x 9	(4) 256K x 9	(4) 1M x 9	NONE
8MB	(4) 1M x 9	(4) 1M x 9	NONE	NONE
9MB	(4) 256K x 9	(4) 1M x 9	(4) 1M x 9	NONE
12MB	(4) 1M x 9	(4) 1M x 9	(4) 1M x 9	NONE
16MB	(4) 1M x 9	(4) 1M x 9	(4) 1M x 9	(4) 1M x 9
16MB	(4) 4M x 9	NONE	NONE	NONE
20MB	(4) 4M x 9	(4) 1M x 9	NONE	NONE
24MB	(4) 1M x 9	(4) 1M x 9	(4) 4M x 9	NONE
32MB	(4) 4M x 9	(4) 4M x 9	NONE	NONE
36MB	(4) 1M x 9	(4) 4M x 9	(4) 4M x 9	NONE
48MB	(4) 4M x 9	(4) 4M x 9	(4) 4M x 9	NONE
64MB	(4) 4M x 9	(4) 4M x 9	(4) 4M x 9	(4) 4M x 9
Note:Banks 2 and 3 are utilized when a 32-bit external memory card is installed at S1.

CACHE CONFIGURATION
Size	Bank 0	Bank 1	(TAG) U15	(TAG) U16
32KB	(4) 8K x 8	NONE	NONE	(1) 8K x 8
64KB	(4) 8K x 8	(4) 8K x 8	(1) 8K x 8	(1) 8K x 8
128KB	(4) 32K x 8	NONE	NONE	(1) 32K x 8

CACHE JUMPER CONFIGURATION
Size	JP6
32KB	pins 1 & 2 closed
64KB	pins 2 & 3 closed
128KB	pins 2 & 3 closed