MB-1425AEA-V, MB-1433AEA-V, MB-1440AEA-V, MB-1450AEA-V Motherboard Settings and Configuration

Processor	80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor Speed	25/33/40/50(internal)/50/66(internal)MHz
Chip Set	Advanced
Max. Onboard DRAM	32MB
Cache	64/128/256KB
BIOS	AMI
Dimensions	254mm x 218mm
I/O Options	32-bit VESA local bus slots (2)
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	JP8	Turbo switch	JP15E
Speaker	JP15A	5V ground connector	JP15F
Power LED & keylock	JP15B	32-bit VESA Local bus slot	S1
Turbo LED	JP15C	32-bit VESA Local bus slot	S2
Reset switch	JP15D

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Factory configured - do not alter	J01	N/A
»	Factory configured - do not alter	JP4	pins 2 & 3 closed
	7 Bit TAG RAM installed	JP6	pins 1 & 2 closed
	8 Bit TAG RAM installed	JP6	pins 2 & 3 closed
	Dallas Real time clock 1287 installed	JP11	Closed
	Battery & Real time clock 146818 installed	JP11	Open
»	Monitor type select color	JP14	pins 2 & 3 closed
	Monitor type select monochrome	JP14	pins 1 & 2 closed
»	CMOS memory normal operation	JP16	pins 2 & 3 closed
	CMOS memory clear	JP16	pins 1 & 2 closed
»	CPU PQFP installed	JP22	pins 1 & 2 closed
	CPU PGA installed	JP22	pins 2 & 3 closed
»	VESA bus clock asynchronous mode	JP26	pins 1 & 2 closed
	VESA bus clock synchronous mode	JP26	pins 2 & 3 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	Max Cachable	Bank 0	Bank 1	TAG
64KB	8MB	(4) 8K x 8	(4) 8K x 8	(1) 8K x 8
128KB	16MB	(4) 32K x 8	NONE	(1) 8K x 8
256KB	32MB	(4) 32K x 8	(4) 32K x 8	(1) 32K x 8

CACHE JUMPER CONFIGURATION
Size	JP12	JP19
64KB	Open	pins 1 & 2 closed
128KB	pins 1 & 2 and 3 & 4 closed	pins 2 & 3 closed
256KB	Closed	pins 1 & 2 closed

CPU TYPE CONFIGURATION
Type	JP13	JP20
80486SX	Open	pins 1 & 2 closed
80487SX	pins 1 & 2 closed	pins 2 & 3 closed
80486DX	pins 2 & 3 closed	pins 2 & 3 closed
ODP486SX	pins 1 & 2 closed	pins 2 & 3 closed
80486DX2	pins 2 & 3 closed	pins 2 & 3 closed

CPU SPEED CONFIGURATION
Speed	JP5	JP10	JP23	JP24
25MHz	pins 2 & 3 closed	Open	Open	Open
33MHz	pins 2 & 3 closed	Open	Closed	Open
40MHz	pins 1 & 2 closed	Closed	Open	Closed
50i MHz	pins 2 & 3 closed	Open	Open	Open
50MHz	pins 1 & 2 closed	Closed	Open	Open
66i MHz	pins 2 & 3 closed	Open	Closed	Open

VESA WAIT STATE CONFIGURATION
Wait states	J02
0 wait states	pins 1 & 2 closed
1 wait state	pins 2 & 3 closed