PCI/ISA UD486GRN Motherboard Settings and Configuration

Processor	CX486SX/80486SX/SL80486SX/SL80486SX2/CX486DX/AM486DX/UMCU5S/ SL80486DX/CX486DX2/AM486DX2/SL80486DX2/AM486DX4/80486DX4
Processor Speed	25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz
Chip Set	UMC
Max. Onboard DRAM	128MB
Cache	128/256/512KB
BIOS	Unidentified
Dimensions	220mm x 220mm
I/O Options	32-bit PCI slots (3), green PC connector, IDE interfaces (2)
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
Speaker	CN1	Turbo switch	JP29
Power LED & keylock	CN2	Turbo LED	JP30
IDE interface	JH1	Reset switch	JP31
IDE interface	JH2	IDE interface LED	JP32
Green PC connector	JP26	32-bit PCI slots	PC1 - PC3

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	CMOS memory normal operation	JC	Closed
	CMOS memory clear	JC	Open
	IDE interface enabled	JP2	Open
	IDE interface disabled	JP2	Closed
»	Port address fixed	JP3	Closed
	Port address relocatable	JP3	Open
»	Factory configured - do not alter	JP10	Open
»	Factory configured - do not alter	JP15	pins 1 & 2 closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
2MB	(1) 256K x 36	(1) 256K x 36	NONE	NONE
4MB	(1) 1M x 36	NONE	NONE	NONE
4MB	NONE	(1) 1M x 36	NONE	NONE
8MB	(1) 1M x 36	(1) 1M x 36	NONE	NONE
8MB	NONE	NONE	(1) 2M x 36	NONE
12MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	NONE
16MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
16MB	(1) 2M x 36	(1) 2M x 36	NONE	NONE
16MB	(1) 4M x 36	NONE	NONE	NONE
32MB	(1) 4M x 36	(1) 4M x 36	NONE	NONE
32MB	NONE	NONE	(1) 4M x 36	(1) 4M x 36
32MB	(1) 8M x 36	NONE	NONE	NONE
48MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	NONE
64MB	(1) 8M x 36	(1) 8M x 36	NONE	NONE
128MB	(1) 8M x 36	(1) 8M x 36	(1) 8M x 36	(1) 8M x 36

CACHE CONFIGURATION
Size	Bank 0	TAG
128KB	(4) 32K x 8	(1) 8K x 8
256KB	(4) 64K x 8	(1) 32K x 8
512KB	(4) 128K x 8	(1) 32K x 8

CACHE JUMPER CONFIGURATION
Size	JP22	JP23 pins 1 & 2	JP23 pins 3 & 4	JP25
128KB	Open	Closed	Open	pins 1 & 2 closed
256KB	Open	Closed	Closed	pins 2 & 3 closed
512KB	Closed	Closed	Closed	pins 2 & 3 closed

CPU TYPE CONFIGURATION
Type	JP7	JP11	JP12	JP13	JP14
CX486SX	Open	1 & 2	Open	2 & 3	1 & 2, 3 & 4
80486SX	Closed	Open	Open	2 & 3	Open
SL80486SX	Closed	Open	Open	2 & 3	2 & 3, 4 & 5
SL80486SX2	Closed	Open	Open	2 & 3	2 & 3, 4 & 5
CX486DX	Open	1 & 2	3 & 4	1 & 2, 3 & 4	1 & 2, 3 & 4
AM486DX	Closed	Open	3 & 4	1 & 2, 3 & 4	Open
UMCU5S	Closed	Open	1 & 2	2 & 3	Open
SL80486DX	Closed	Open	3 & 4	1 & 2, 3 & 4	2 & 3, 4 & 5
CX486DX2	Open	1 & 2	3 & 4	1 & 2, 3 & 4	1 & 2, 3 & 4
AM486DX2	Closed	Open	3 & 4	1 & 2, 3 & 4	Open
SL80486DX2	Closed	Open	3 & 4	1 & 2, 3 & 4	2 & 3, 4 & 5
AM486DX4	Closed	Open	3 & 4	1 & 2, 3 & 4	Open
80486DX4	Closed	Open	3 & 4	1 & 2, 3 & 4	2 & 3, 4 & 5
Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CON’T)
Type	JP16	JP17	JP19	JP20	JP21	JP24
CX486SX	2 & 3	1 & 2	2 & 3	1 & 2	2 & 3	2 & 3
80486SX	1 & 2	1 & 2	Open	Open	Open	Open
SL80486SX	1 & 2	1 & 2	Open	1 & 2	1 & 2	Open
SL80486SX2	1 & 2	1 & 2	Open	1 & 2	1 & 2	Open
CX486DX	2 & 3	1 & 2	2 & 3	1 & 2	2 & 3	2 & 3
AM486DX	1 & 2	1 & 2	Open	Open	Open	Open
UMCU5S	1 & 2	2 & 3	Open	2 & 3	Open	3 & 4
SL80486DX	1 & 2	1 & 2	Open	1 & 2	1 & 2	Open
CX486DX2	2 & 3	1 & 2	2 & 3	1 & 2	2 & 3	2 & 3
AM486DX2	1 & 2	1 & 2	Open	Open	Open	Open
SL80486DX2	1 & 2	1 & 2	Open	1 & 2	1 & 2	Open
AM486DX4	1 & 2	1 & 2	Open	Open	Open	Open
80486DX4	1 & 2	1 & 2	Open	1 & 2	1 & 2	Open
Note: Pins designated should be in the closed position.

CPU SPEED CONFIGURATION
Speed	JP18 pins 1 & 2	JP18 pins 3 & 4	JP18 pins 5 & 6
25MHz	Open	Open	Open
33MHz	Closed	Closed	Open
40MHz	Open	Closed	Open
50iMHz	Open	Open	Open
50MHz	Closed	Open	Open
66iMHz	Closed	Closed	Open
75iMHz	Open	Open	Open
100iMHz	Closed	Closed	Open

CPU SPEED CONFIGURATION (80486DX4 ONLY)
Speed	JP9
2x	Closed
3x	Open

KEYBOARD CONFIGURATION
Setting	JP1	JP4	JP5	JP6	JP27	JP28
Internal	7 & 8, 9 & 10	1 & 2	1 & 2	1 & 2	2 & 3	1 & 2
External	1 & 3, 2 & 4, 5 & 7, 6 & 8	2 & 3	2 & 3	2 & 3	1 & 2	2 & 3
Note: Pins designated should be in the closed position.

MISCELLANEOUS TECHNICAL NOTE

Note: The location of pin 1 is unidentified. Jumpers are shown for location purposes only. The actual location may vary.