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MB-1500/1575/1590PCT
BIOSTAR MICROTECH INTERNATIONAL, INC.

MB-1500/1575/1590PCT

Processor	Pentium
Processor Speed	75/90/100MHz
Chip Set	Unidentified
Max. Onboard DRAM	128MB
Cache	256/512/1024/2048KB
BIOS	Award
Dimensions	330mm x 218mm
I/O Options	32-bit VESA local bus slots (2), 32-bit PCI slots (3)
NPU Options	None

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
�	Host data wait state select 1 wait state	JP4	Open
	Host data wait state select 0 wait states	JP4	Closed
�	Back to back I/O delay select 3 wait states	JP6	Open
	Back to back I/O delay select 0 wait states	JP6	Closed
�	CMOS memory normal operation	JP8	pins 2 & 3 closed
	CMOS memory clear	JP8	pins 3 & 4 closed
	Battery type select external	JP8	Closed
�	Monitor type select color	JP14	Open
	Monitor type select monochrome	JP14	Closed
�	Factory configured - do not alter	JP19	Open
�	Buffer type select stand alone	JP26	Open
	Buffer type select loaded component	JP26	Closed
�	Factory configured - do not alter	JP31	Open
�	Stop clock select enabled	JP33	Open
	Stop clock select disabled	JP33	Closed
�	Bus/core ratio select 2/3 ratio	JP34	Open
	Bus/core ratio select 1/2 ratio	JP34	Closed
�	Factory configured - do not alter	JP35	Open

CACHE JUMPER CONFIGURATION
Size	JP20	JP21	JP22	JP23	JP28	JP29	JP30
256KB	Open	Open	Open	Open	1 & 2	Open	1 & 2
512KB	Open	Open	Closed	Open	2 & 3	Open	2 & 3
512KB	Open	Open	Closed	Open	1 & 2	2 & 3	1 & 2
1MB	Open	Closed	Closed	Open	2 & 3	1 & 2	2 & 3
1MB	Open	Closed	Closed	2 & 3	1 & 2	2 & 3	1 & 2
2MB	Closed	Closed	Closed	1 & 2	2 & 3	1 & 2	2 & 3
Note: Pins designated should be in the closed position.

CACHE VOLTAGE CONFIGURATION
Voltage	JP17	JP18
3v	pins 3 & 5, 4 & 6 closed	pins 3 & 5, 4 & 6 closed
5v	pins 1 & 3, 2 & 4 closed	pins 1 & 3, 2 & 4 closed
Note: JP17 = Bank 0 and JP18 = Bank 1.

VESA WAIT STATE CONFIGURATION
Wait states	JP5
0 wait states	Open
1 wait state	Closed