MB-1212V Motherboard Settings and Configuration

Processor	80286
Processor Speed	10/12MHz
Chip Set	VLSI
Max. Onboard DRAM	4MB
Cache	None
BIOS	AMI/Award/Phoenix
Dimensions	330mm x 218mm
I/O Options	None
NPU Options	80287

CONNECTIONS
Purpose	Location	Purpose	Location
Reset switch	JP1	Turbo switch	JP4
Power LED & keylock	JP2	Turbo LED	JP5
Speaker	JP3	External battery	JP17

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Memory speed select 100ns	JP6	pins 1 & 2 closed
	Wait state select 0 wait states	JP10	Closed
	Wait state select 1 wait state	JP10	Open
	BIOS type select 27256	JP11	pins 1 & 2 closed
	BIOS type select 27128	JP11	pins 2 & 3 closed
	Monitor type select color	JP12	pins 1 & 2 closed
	Monitor type select monochrome	JP12	pins 2 & 3 closed
	Power good signal detect from power supply	JP16	see note
	Power good signal detect from board	JP16	see note
	Parity check enabled	JP19	pins 1 & 2 closed
	Parity check disabled	JP19	pins 2 & 3 closed
Note: JP19 is an optional jumper and may not be present on all boards. The settings for JP16 are unidentified.

DRAM CONFIGURATION
Size	Bank 0	Bank 0A	Bank 1	Bank 1A	Bank 1B
512KB	NONE	(4) 44256	NONE	NONE	NONE
640KB	NONE	(4) 44256	NONE	NONE	(4) 4164
640KB	NONE	(4) 44256	(18) 4164	NONE	NONE
1MB	NONE	(4) 44256	NONE	(4) 44256	NONE
2MB	(18) 41100	NONE	NONE	NONE	NONE
4MB	(18) 41100	NONE	(18) 41100	NONE	NONE
Note: See table below for parity configuration.

DRAM PARITY CONFIGURATION
Size	P 0	P 1
512KB	(2) 41256	NONE
640KB	(2) 41256	NONE
640KB	(2) 41256	NONE
1MB	(2) 41256	(2) 41256
2MB	NONE	NONE
4MB	NONE	NONE

DRAM JUMPER CONFIGURATION
Size	JP7	JP8	JP9
512KB	Closed	Closed	Closed
640KB	Closed	Closed	Open
1MB	Closed	Open	Closed
2MB	Closed	Open	Open
4MB	Open	Closed	Closed

KEYBOARD BIOS CONFIGURATION
Setting	JP13	JP14	JP15	JP18
Controller on pin 30	Closed	Open	Open	Open
Controller on pin 23	Open	Closed	Open	Open
Controller on pin 27	Open	Open	Closed	Open
Controller on pin 32	Open	Open	Open	Closed