MB1433FA Motherboard Settings and Configuration

Processor	80486SX/80487SX/80486DX/80486DX2
Processor Speed	25/33/40/50(internal)/50/66(internal)MHz
Chip Set	Unidentified
Max. Onboard DRAM	32MB
Cache	32/64/128/256KB
BIOS	AMI
Dimensions	254mm x 220mm
I/O Options	None
NPU Options	4167

CONNECTIONS
Purpose	Location	Purpose	Location
Power LED & keylock	J1	Reset switch	J4
Speaker	J2	Turbo switch	J5
Turbo LED	J3	External battery	JP17

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Keyboard BIOS pin size select 23	JP3	pins 1 & 3 closed
	Keyboard BIOS pin size select 30	JP3	pins 2 & 4 closed
»	Monitor type select monochrome	JP4	Open
	Monitor type select color	JP4	Closed
»	Chip type select 146818	JP7	Open
	Chip type select Dallas	JP7	Closed
»	CMOS memory normal operation	JP11	pins 2 & 4 closed
	CMOS memory clear	JP11	pins 1 & 3 closed
»	Fuse enabled	JPE	Open
	Fuse disabled	JPE	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
32MB	(4) 4M x 9	(4) 4M x 9

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

CACHE JUMPER CONFIGURATION
Size	jp2	jp13	jp16	jp18	jp20
32KB	1 & 8, 2 & 7, 3 & 6, 4 & 5	1 & 4	1 & 4	Open	Open
64KB	1 & 8, 2 & 7, 4 & 5	2 & 3	1 & 4	1 & 4	Open
128KB	1 & 8, 2 & 7, 3 & 6	1 & 4	1 & 4	1 & 4, 2 & 3	1 & 8, 2 & 7
256KB	1 & 8, 2 & 7	2 & 3	1 & 4, 2 & 3	1 & 4, 2 & 3	3 & 6, 4 & 5
Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION
Type	JP10
80486SX	pins 3 & 10 closed
80487SX	pins 1 & 12, 2 & 11, 5 & 8 closed
80486DX	pins 1 & 12, 2 & 11, 3 & 10 closed
80486DX2	pins 1 & 12, 2 & 11, 3 & 10 closed