R386DX33 MBC Motherboard Settings and Configuration

Processor	80386DX
Processor Speed	33/40MHz
Chip Set	UMC
Max. Onboard DRAM	32MB
Cache	32/64/128/256KB
BIOS	AMI
Dimensions	330mm x 218mm
I/O Options	None
NPU Options	80387DX/3167

CONNECTIONS
Purpose	Location	Purpose	Location
Power LED & keylock	J1	Speaker	J4
Turbo switch	J2	Reset switch	J5
Turbo LED	J3	External battery	J6

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Tag ram not installed in U3	W2	Open
	Tag ram installed in U3	W2	Closed
»	Monitor type select CGA	W11	Closed
	Monitor type select monochrome/EGA/VGA	W11	Open
»	Battery type select internal	W13	Closed
	Battery type select external	W13	Open

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
32MB	(4) 4M x 9	(4) 4M x 9

CACHE CONFIGURATION
Size	Bank 0	Bank 1	TAG (U4 & U5)
32KB	(4) 8K x 8	NONE	(2) 16K x 4
64KB	(4) 8K x 8	(4) 8K x 8	(2) 16K x 4
128KB	(4) 32K x 8	NONE	(2) 16K x 4
256KB	(4) 32K x 8	(4) 32K x 8	(2) 16K x 4

OPTIONAL TAG CONFIGURATION
CPU speed	(U3)	(U6)
33MHz	(1) 16K x 4	(1) 16K x 4
40MHz	(1) 16K x 6	(1) 16K x 6
Note: U3 is used only when more than 16M of memory is installed. U6 is optional and when installed, supports write-back cache.

CACHE JUMPER CONFIGURATION
Size	W3	W4	W5	W6	W7
32KB	1 & 2	1 & 2	1 & 2	2 & 3	N/A
64KB	2 & 3	1 & 2	1 & 2	1 & 2	N/A
128KB	2 & 3	2 & 3	1 & 2	2 & 3	1 & 2
256KB	2 & 3	2 & 3	2 & 3	1 & 2	2 & 3
Note: Pins designated should be in the closed position.

MATH COPROCESSOR CONFIGURATION (80387)
CPU Type		W1	W8	W9	W10
»	Not installed	Open	N/A	N/A	Open
	Synchronous mode	Closed	pins 1 & 2 closed	Open	Closed
	Asynchronous mode	Closed	pins 2 & 3 closed	Closed	Closed
Note: For 3167 installation, use default settings and configure in advanced BIOS setup.