DC-386 33/40C Motherboard Settings and Configuration

Processor	80386DX
Processor Speed	25/33/40MHz
Chip Set	OPTI
Max. Onboard DRAM	32MB
Cache	32/64/128/256KB
BIOS	AMI
Dimensions	330mm x 218mm
I/O Options	32-bit external memory card slot
NPU Options	80387DX/3167

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	J10	32-bit external memory card	S1
Power LED & keylock	J23	Reset switch	SW1
Speaker	J24	Turbo switch	SW2
Turbo LED	JP4

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Monitor type select color	JP1	Open
	Monitor type select monochrome	JP1	Closed
»	CMOS memory normal operation	JP2	pins 2 & 3 closed
	CMOS memory clear	JP2	pins 1 & 2 closed
»	Bus speed select ATCLK/8	JP3	pins 1 & 2 closed
	Bus speed select ATCLK/6	JP3	pins 1 & 2 open
Note:JP3 is a 4-pin jumper, pins 3 & 4 are not used.

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
8MB	(4) 1M x 9	(4) 1M x 9	NONE	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) 1M x 9	(4) 4M x 9	NONE	NONE
24MB	(4) 1M x 9	(4) 1M x 9	(4) 4M x 9	NONE
28MB	(4) 1M x 9	(4) 1M x 9	(4) 1M x 9	(4) 4M x 9
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
40MB	(4) 1M x 9	(4) 1M x 9	(4) 4M x 9	(4) 4M x 9
48MB	(4) 4M x 9	(4) 4M x 9	(4) 4M x 9	NONE
52MB	(4) 1M x 9	(4) 4M x 9	(4) 4M x 9	(4) 4M x 9
64MB	(4) 4M x 9	(4) 4M x 9	(4) 4M x 9	(4) 4M x 9
Note:Banks 2 & 3 are utilized when a 32-bit external memory card is installed at S1.

CACHE CONFIGURATION
Size	Bank 0	Bank 1	TAG (U32, U33)	TAG (U42)
32KB	(4) 8K x 8	NONE	(2) 4K x 4	(1) 4K x 4
64KB	(4) 8K x 8	(4) 8K x 8	(2) 4K x 4	(1) 4K x 4
128KB	(4) 32K x 8	NONE	(2) 16K x 4	(1) 16K x 1
256KB	(4) 32K x 8	(4) 32K x 8	(2) 16K x 4	(1) 16K x 1

CACHE JUMPER CONFIGURATION
Size	JP5	JP6	JP7	JP8	JP9	JP10
32KB	1 & 2	1 & 2	1 & 2	Open	2 & 3	2 & 3
64KB	2 & 3	1 & 2	1 & 2	Open	2 & 3	1 & 2
128KB	2 & 3	1 & 2	2 & 3	Closed	2 & 3	1 & 2
256KB	2 & 3	2 & 3	2 & 3	Closed	1 & 2	1 & 2
Note:Pins designated should be in the closed position.