MB-60 EISA486/33/50 Motherboard Settings and Configuration

Processor	80486DX/80486DX2
Processor Speed	33/50(internal)/50/66(internal)MHz
Chip Set	OPTI
Max. Onboard DRAM	128MB
SRAM Cache	64/128/256
BIOS	AMI
Dimensions	330.2mm x 218.4mm
I/O Options	None
NPU Options	4167

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

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Power good signal detect from board	JP2	pins 1 & 2 closed
	Power good signal detect from power supply	JP2	pins 2 & 3 closed
»	Monitor type select color	JP3	closed
	Monitor type select monochrome	JP3	open
	ATCLK select iOSC/1	JP6	pins 1 & 2 closed
	ATCLK select iOSC/2	JP6	pins 2 & 3 closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1
4MB	(4) 1M x 9	NONE
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
64MB	(4) 16M x 9	NONE
128MB	(4) 16M x 9	(4) 16M x 9

SRAM JUMPER CONFIGURATION
Jumper	64KB	128KB	256KB
JP7	open	open	closed
JP8	open	open	closed
JP9	open	closed	closed
JP10	open	closed	closed
JP11	pins 2 & 3 closed	pins 1 & 2 closed	pins 2 & 3 closed

SRAM CONFIGURATION
Size	Cache SRAM	Location
64KB	(8) 8K x 8	Banks 0 & 1
128KB	(4) 32K x 8	Bank 0
256KB	(8) 32K x 8	Banks 0 & 1
Note:The TAG memory does not need to be changed when upgrading.

CPU JUMPER CONFIGURATION
CPU	JP4	JP5
80486DX2/66	closed	open
80486DX/50	closed	closed
80486DX2/50	open	open
80486DX/40	open	closed
80486DX/33	closed	open