GMB-486SG (VER. 6.02) Motherboard Settings and Configuration

GEMLIGHT COMPUTER, LTD.

GMB-486SG (VER. 6.02)

Processor
CX486S/UMCU5/80486SX/SL80486SX/CX486DX/80486DX/ SL80486DX/CX486DX2/AM486DX2/(SL)AM486DX2/80486DX2/ SL80486DX2/AM486DX4/(SL)AM486DX4/80486DX4/P24D/P24T
Processor Speed
20/25/33/40/50(internal)/50/60/66(internal)/75(internal)/ 80(internal)/100(internal)MHz
Chip Set
Unidentified
Video Chip Set
None
Maximum Onboard Memory
128MB
Maximum Video Memory
None
Cache
128/256/512KB
BIOS
Award
Dimensions
250mm x 220mm
I/O Options
32-bit VESA local bus slots (3), green PC connector
NPU Options
None

CONNECTIONS
Purpose
Location
Purpose
Location
External battery
J1
Reset switch
J6
Green PC connector
J2
Power LED & keylock
J7
Turbo switch
J3
Green PC connector
JP26
Turbo LED
J4
Green PC LED
JP27
Speaker
J5
32-bit VESA local bus slots
SL1 – SL3

USER CONFIGURABLE SETTINGS
Function
Label
Position
»
Turbo enabled
J3
Pins 2 & 3 closed

Turbo disabled
J3
Pins 1 & 2 closed
»
CMOS memory normal operation
JP16
Pins 1 & 2 closed

CMOS memory clear
JP16
Pins 2 & 3 closed
»
Monitor type select monochrome/VGA/EGA
JP17
Open

Monitor type select EGA
JP17
Closed
»
CLKIN delay for CPUCLK
JP20
Pins 2 & 3 closed

CLKIN & CPUCLK same phase
JP20
Pins 1 & 2 closed

DRAM CONFIGURATION
Size
Bank 0
Bank 1
Bank 2
Bank 3
1MB
(1) 256K x 36
None
None
None
2MB
(1) 256K x 36
(1) 256K x 36
None
None
2MB
(1) 512K x 36
None
None
None
4MB
(1) 256K x 36
(1) 256K x 36
(1) 512K x 36
None
4MB
(1) 512K x 36
(1) 512K x 36
None
None
4MB
(1) 1M x 36
None
None
None
5MB
(1) 256K x 36
(1) 1M x 36
None
None
6MB
(1) 256K x 36
(1) 256K x 36
(1) 1M x 36
None
6MB
(1) 512K x 36
(1) 1M x 36
None
None
8MB
(1) 256K x 36
(1) 256K x 36
(1) 512K x 36
(1) 1M x 36
8MB
(1) 512K x 36
(1) 512K x 36
(1) 1M x 36
None
8MB
(1) 1M x 36
(1) 1M x 36
None
None
8MB
(1) 2M x 36
None
None
None
10MB
(1) 256K x 36
(1) 256K x 36
(1) 1M x 36
(1) 1M x 36
12MB
(1) 512K x 36
(1) 512K x 36
(1) 1M x 36
(1) 1M x 36
12MB
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
None
12MB
(1) 1M x 36
(1) 2M x 36
None
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
16MB
(1) 1M x 36
(1) 1M x 36
(1) 2M x 36
None
17MB
(1) 256K x 36
(1) 4M x 36
None
None

DRAM CONFIGURATION (CON’T)
Size
Bank 0
Bank 1
Bank 2
Bank 3
18MB
(1) 256K x 36
(1) 256K x 36
(1) 4M x 36
None
18MB
(1) 512K x 36
(1) 4M x 36
None
None
20MB
(1) 512K x 36
(1) 512K x 36
(1) 4M x 36
None
20MB
(1) 1M x 36
(1) 4M x 36
None
None
20MB
(1) 1M x 36
(1) 2M x 36
(1) 2M x 36
None
24MB
(1) 512K x 36
(1) 512K x 36
(1) 1M x 36
(1) 4M x 36
24MB
(1) 1M x 36
(1) 1M x 36
(1) 4M x 36
None
24MB
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
None
24MB
(1) 1M x 36
(1) 1M x 36
(1) 2M x 36
(1) 2M x 36
24MB
(1) 2M x 36
(1) 4M x 36
None
None
28MB
(1) 1M x 36
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
32MB
(1) 4M x 36
(1) 4M x 36
None
None
32MB
(1) 8M x 36
None
None
None
32MB
(1) 2M x 36
(1) 2M x 36
(1) 4M x 36
None
32MB
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
36MB
(1) 512K x 36
(1) 512K x 36
(1) 4M x 36
(1) 4M x 36
36MB
(1) 1M x 36
(1) 4M x 36
(1) 4M x 36
None
36MB
(1) 1M x 36
(1) 8M x 36
None
None
40MB
(1) 1M x 36
(1) 1M x 36
(1) 4M x 36
(1) 4M x 36
40MB
(1) 1M x 36
(1) 1M x 36
(1) 8M x 36
None
40MB
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
(1) 4M x 36
48MB
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36
None
48MB
(1) 4M x 36
(1) 8M x 36
None
None
48MB
(1) 2M x 36
(1) 2M x 36
(1) 4M x 36
(1) 4M x 36
48MB
(1) 2M x 36
(1) 2M x 36
(1) 8M x 36
None
64MB
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36
64MB
(1) 16M x 36
None
None
None
64MB
(1) 4M x 36
(1) 4M x 36
(1) 8M x 36
None
64MB
(1) 8M x 36
(1) 8M x 36
None
None
65MB
(1) 256K x 36
(1) 16M x 36
None
None
68MB
(1) 1M x 36
(1) 16M x 36
None
None
68MB
(1) 1M x 36
(1) 8M x 36
(1) 8M x 36
None
72MB
(1) 1M x 36
(1) 1M x 36
(1) 16M x 36
None
72MB
(1) 1M x 36
(1) 1M x 36
(1) 8M x 36
(1) 8M x 36
80MB
(1) 4M x 36
(1) 16M x 36
None
None
80MB
(1) 4M x 36
(1) 8M x 36
(1) 8M x 36
None
80MB
(1) 2M x 36
(1) 2M x 36
(1) 8M x 36
(1) 8M x 36
96MB
(1) 4M x 36
(1) 4M x 36
(1) 16M x 36
None
96MB
(1) 4M x 36
(1) 4M x 36
(1) 8M x 36
(1) 8M x 36
96MB
(1) 8M x 36
(1) 8M x 36
(1) 8M x 36
None
128MB
(1) 16M x 36
(1) 16M 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
Bank 1
TAG
128KB
(4) 32K x 8
None
(1) 8K x 8
256KB (A)
(4) 32K x 8
(4) 32K x 8
(1) 16K/32K x 8
256KB (B)
(4) 64K x 8
None
(1) 16K/32K x 8
512KB
(4) 128K x 8
None
(1) 32K x 8

CACHE JUMPER CONFIGURATION
Size
JP1
JP3
JP33
128KB
Pins 1 & 2 closed
Pins 1 & 2, 3 & 4 closed
Pins 2 & 3 closed
256KB (A)
Pins 2 & 3 closed
Pins 2 & 3, 4 & 5 closed
Pins 2 & 3 closed
256KB (B)
Pins 1 & 2 closed
Pins 1 & 2, 3 & 4 closed
Pins 1 & 2 closed
512KB
Pins 1 & 2 closed
Pins 1 & 2, 3 & 4 closed
Pins 2 & 3 closed

CACHE TAG JUMPER CONFIGURATION
Cache
TAG
JP2
JP4
128KB
(1) 8K x 8
Pins 1 & 2 closed
Pins 1 & 2 closed
256KB (A,B)
(1) 16K x 8
Pins 3 & 4 closed
Open
256KB (A,B)
(1) 32K x 8
Pins 2 & 3 closed
Pins 1 & 2 closed
512KB
(1) 32K x 8
Pins 2 & 3 closed
Pins 2 & 3 closed

CPU SPEED SELECTION (AV9107-03)
Speed
JP5
JP6
JP7
20MHz
Closed
Open
Closed
25MHz
Closed
Closed
Open
33MHz
Open
Closed
Closed
40MHz
Closed
Open
Open
50iMHz
Closed
Closed
Open
50MHz
Open
Open
Closed
66iMHz
Open
Closed
Closed
75iMHz
Closed
Closed
Open
80iMHz
Closed
Open
Open
100iMHz
Open
Closed
Closed

CPU SPEED SELECTION (MS-8315)
Speed
JP5
JP6
JP7
20MHz
Open
Open
Open
25MHz
Open
Closed
Open
33MHz
Closed
Closed
Closed
40MHz
Open
Closed
Closed
50iMHz
Open
Closed
Open
50MHz
Closed
Open
Open
66iMHz
Closed
Closed
Closed
75iMHz
Open
Closed
Open
80iMHz
Open
Closed
Closed
100iMHz
Closed
Closed
Closed

CPU TYPE SELECTION
Type
JP8
JP10
JP11
JP12
JP13
CX486S
2 & 3
2 & 3
Open
2 & 3, 4 & 5
Open
UMC U5
1 & 2, 3 & 4
2 & 3
1 & 2, 3 & 4
Open
Open
80486SX
2 & 3
2 & 3
Open
3 & 4
1 & 2
SL80486SX
2 & 3
2 & 3
Open
3 & 4
1 & 2
CX486DX
1 & 2, 3 & 4
2 & 3
3 & 4
2 & 3
Open
80486DX
1 & 2, 3 & 4
2 & 3
3 & 4
3 & 4
1 & 2
SL80486DX
1 & 2, 3 & 4
2 & 3
3 & 4
3 & 4
1 & 2
CX486DX2
1 & 2, 3 & 4
2 & 3
3 & 4
2 & 3
Open
CX486DX2 (3.6v)
1 & 2, 3 & 4
2 & 3
3 & 4
2 & 3
Open
CX486DX2 (4v)
1 & 2, 3 & 4
2 & 3
3 & 4
2 & 3
Open
AM486DX2 (3.45v)
1 & 2, 3 & 4
2 & 3
3 & 4
Open
Open
(SL)AM486DX2 (3.45v)
1 & 2, 3 & 4
2 & 3
3 & 4
1 & 2, 3 & 4
2 & 3
80486DX2
1 & 2, 3 & 4
2 & 3
3 & 4
3 & 4
1 & 2
SL80486DX2
1 & 2, 3 & 4
2 & 3
3 & 4
3 & 4
1 & 2
AM486DX4 (3.45v)
1 & 2, 3 & 4
2 & 3
3 & 4
Open
Open
(SL)AM486DX4 (3.45v)
1 & 2, 3 & 4
2 & 3
3 & 4
1 & 2, 3 & 4
2 & 3
80486DX4
1 & 2, 3 & 4
2 & 3
3 & 4
3 & 4
1 & 2
P24D
1 & 2, 3 & 4
1 & 2
3 & 4
1 & 2, 3 & 4
2 & 3
P24T
1 & 2, 3 & 4
1 & 2
2 & 3
3 & 4
Open
Note: Pins designated should be in the closed position.

CPU TYPE SELECTION (CON’T)
Type
JP14
JP15
JP21
JP22
JP24
JP25
CX486S
1 & 2, 3 & 4
2 & 3
1 & 2
2 & 3
2 & 3
2 & 3
UMC U5
Open
Open
1 & 2
2 & 3
3 & 4
Open
80486SX
2 & 3
4 & 5
2 & 3
1 & 2
Open
Open
SL80486SX
2 & 3
4 & 5
2 & 3
1 & 2
Open
Open
CX486DX
1 & 2
2 & 3
1 & 2
2 & 3
2 & 3
2 & 3
80486DX
2 & 3
4 & 5
2 & 3
1 & 2
Open
Open
SL80486DX
2 & 3
4 & 5
2 & 3
1 & 2
Open
Open
CX486DX2
1 & 2
2 & 3
1 & 2
2 & 3
2 & 3
2 & 3
CX486DX2 (3.6v)
1 & 2
2 & 3
1 & 2
2 & 3
2 & 3
2 & 3
CX486DX2 (4v)
1 & 2
2 & 3
1 & 2
2 & 3
2 & 3
2 & 3
AM486DX2 (3.45v)
Open
Open
2 & 3
1 & 2
Open
Open
(SL)AM486DX2 (3.45v)
2 & 3
4 & 5
1 & 2
1 & 2
5 & 6
Open
80486DX2
2 & 3
4 & 5
2 & 3
1 & 2
Open
Open
SL80486DX2
2 & 3
4 & 5
2 & 3
1 & 2
Open
Open
AM486DX4 (3.45v)
Open
Open
2 & 3
1 & 2
Open
Open
(SL)AM486DX4 (3.45v)
2 & 3
4 & 5
1 & 2
1 & 2
Open
Open
80486DX4
2 & 3
4 & 5
2 & 3
1 & 2
Open
Open
P24D
2 & 3
4 & 5
1 & 2
1 & 2
Open
1 & 2
P24T
2 & 3
1 & 2
1 & 2
1 & 2
1 & 2
1 & 2
Note: Pins designated should be in the closed position.

CPU TYPE SELECTION (CON’T)
Type
JP30
JP31
JP34
JP35
JP36
JP38
CX486S
Open
Open
1 & 2
Closed
Open
Open
UMC U5
Open
Open
2 & 3
Closed
Open
Open
80486SX
Open
Open
1 & 2
Closed
Open
Open
SL80486SX
Open
Open
1 & 2
Closed
Open
Open
CX486DX
Open
Open
1 & 2
Closed
Open
Open
80486DX
Open
Open
1 & 2
Closed
Open
Open
SL80486DX
Open
Open
1 & 2
Closed
Open
Open
CX486DX2
Open
Open
1 & 2
Closed
Open
Open
CX486DX2 (3.6v)
Open
Open
1 & 2
Open
Open
1 & 2
CX486DX2 (4v)
Open
Open
1 & 2
Open
Open
2 & 3
AM486DX2 (3.45v)
2 & 3
Open
Open
Open
2 & 3
Open
(SL)AM486DX2 (3.45v)
1 & 2
1 & 2
1 & 2
Open
2 & 3
Open
80486DX2
Open
Open
1 & 2
Closed
Open
Open
SL80486DX2
Open
Open
1 & 2
Closed
Open
Open
AM486DX4 (3.45v)
Open
Open
Open
Open
2 & 3
Open
(SL)AM486DX4 (3.45v)
1 & 2
1 & 2
1 & 2
Open
2 & 3
Open
80486DX4
Open
Open
1 & 2
Open
1 & 2
Open
P24D
1 & 2
1 & 2
1 & 2
Closed
Open
Open
P24T
Open
Open
1 & 2
Closed
Open
Open
Note: Pins designated should be in the closed position.

VL BUS WAIT STATE SELECTION
Setting
JP28

0
Pins 1 & 2 closed
»
1
Pins 2 & 3 closed

VL BUS SPEED SELECTION
Speed
JP29

<= 33MHz
Pins 1 & 2 closed
»
>33 MHz
Pins 2 & 3 closed

FLASH BIOS SELECTION
Setting
JP37
»
EPROM
Open

5v flash
Pins 2 & 3 closed

12v flash
Pins 1 & 2 closed

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GMB-486SG (VER. 6.02) Motherboard Settings and Configuration

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Processor	CX486S/UMCU5/80486SX/SL80486SX/CX486DX/80486DX/ SL80486DX/CX486DX2/AM486DX2/(SL)AM486DX2/80486DX2/ SL80486DX2/AM486DX4/(SL)AM486DX4/80486DX4/P24D/P24T
Processor Speed	20/25/33/40/50(internal)/50/60/66(internal)/75(internal)/ 80(internal)/100(internal)MHz
Chip Set	Unidentified
Video Chip Set	None
Maximum Onboard Memory	128MB
Maximum Video Memory	None
Cache	128/256/512KB
BIOS	Award
Dimensions	250mm x 220mm
I/O Options	32-bit VESA local bus slots (3), green PC connector
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	J1	Reset switch	J6
Green PC connector	J2	Power LED & keylock	J7
Turbo switch	J3	Green PC connector	JP26
Turbo LED	J4	Green PC LED	JP27
Speaker	J5	32-bit VESA local bus slots	SL1 – SL3

USER CONFIGURABLE SETTINGS
Function		Label	Position
»	Turbo enabled	J3	Pins 2 & 3 closed
	Turbo disabled	J3	Pins 1 & 2 closed
»	CMOS memory normal operation	JP16	Pins 1 & 2 closed
	CMOS memory clear	JP16	Pins 2 & 3 closed
»	Monitor type select monochrome/VGA/EGA	JP17	Open
	Monitor type select EGA	JP17	Closed
»	CLKIN delay for CPUCLK	JP20	Pins 2 & 3 closed
	CLKIN & CPUCLK same phase	JP20	Pins 1 & 2 closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
1MB	(1) 256K x 36	None	None	None
2MB	(1) 256K x 36	(1) 256K x 36	None	None
2MB	(1) 512K x 36	None	None	None
4MB	(1) 256K x 36	(1) 256K x 36	(1) 512K x 36	None
4MB	(1) 512K x 36	(1) 512K x 36	None	None
4MB	(1) 1M x 36	None	None	None
5MB	(1) 256K x 36	(1) 1M x 36	None	None
6MB	(1) 256K x 36	(1) 256K x 36	(1) 1M x 36	None
6MB	(1) 512K x 36	(1) 1M x 36	None	None
8MB	(1) 256K x 36	(1) 256K x 36	(1) 512K x 36	(1) 1M x 36
8MB	(1) 512K x 36	(1) 512K x 36	(1) 1M x 36	None
8MB	(1) 1M x 36	(1) 1M x 36	None	None
8MB	(1) 2M x 36	None	None	None
10MB	(1) 256K x 36	(1) 256K x 36	(1) 1M x 36	(1) 1M x 36
12MB	(1) 512K x 36	(1) 512K x 36	(1) 1M x 36	(1) 1M x 36
12MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	None
12MB	(1) 1M x 36	(1) 2M x 36	None	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
16MB	(1) 1M x 36	(1) 1M x 36	(1) 2M x 36	None
17MB	(1) 256K x 36	(1) 4M x 36	None	None

DRAM CONFIGURATION (CON’T)
Size	Bank 0	Bank 1	Bank 2	Bank 3
18MB	(1) 256K x 36	(1) 256K x 36	(1) 4M x 36	None
18MB	(1) 512K x 36	(1) 4M x 36	None	None
20MB	(1) 512K x 36	(1) 512K x 36	(1) 4M x 36	None
20MB	(1) 1M x 36	(1) 4M x 36	None	None
20MB	(1) 1M x 36	(1) 2M x 36	(1) 2M x 36	None
24MB	(1) 512K x 36	(1) 512K x 36	(1) 1M x 36	(1) 4M x 36
24MB	(1) 1M x 36	(1) 1M x 36	(1) 4M x 36	None
24MB	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36	None
24MB	(1) 1M x 36	(1) 1M x 36	(1) 2M x 36	(1) 2M x 36
24MB	(1) 2M x 36	(1) 4M x 36	None	None
28MB	(1) 1M x 36	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36
32MB	(1) 4M x 36	(1) 4M x 36	None	None
32MB	(1) 8M x 36	None	None	None
32MB	(1) 2M x 36	(1) 2M x 36	(1) 4M x 36	None
32MB	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36
36MB	(1) 512K x 36	(1) 512K x 36	(1) 4M x 36	(1) 4M x 36
36MB	(1) 1M x 36	(1) 4M x 36	(1) 4M x 36	None
36MB	(1) 1M x 36	(1) 8M x 36	None	None
40MB	(1) 1M x 36	(1) 1M x 36	(1) 4M x 36	(1) 4M x 36
40MB	(1) 1M x 36	(1) 1M x 36	(1) 8M x 36	None
40MB	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36	(1) 4M x 36
48MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	None
48MB	(1) 4M x 36	(1) 8M x 36	None	None
48MB	(1) 2M x 36	(1) 2M x 36	(1) 4M x 36	(1) 4M x 36
48MB	(1) 2M x 36	(1) 2M x 36	(1) 8M x 36	None
64MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36
64MB	(1) 16M x 36	None	None	None
64MB	(1) 4M x 36	(1) 4M x 36	(1) 8M x 36	None
64MB	(1) 8M x 36	(1) 8M x 36	None	None
65MB	(1) 256K x 36	(1) 16M x 36	None	None
68MB	(1) 1M x 36	(1) 16M x 36	None	None
68MB	(1) 1M x 36	(1) 8M x 36	(1) 8M x 36	None
72MB	(1) 1M x 36	(1) 1M x 36	(1) 16M x 36	None
72MB	(1) 1M x 36	(1) 1M x 36	(1) 8M x 36	(1) 8M x 36
80MB	(1) 4M x 36	(1) 16M x 36	None	None
80MB	(1) 4M x 36	(1) 8M x 36	(1) 8M x 36	None
80MB	(1) 2M x 36	(1) 2M x 36	(1) 8M x 36	(1) 8M x 36
96MB	(1) 4M x 36	(1) 4M x 36	(1) 16M x 36	None
96MB	(1) 4M x 36	(1) 4M x 36	(1) 8M x 36	(1) 8M x 36
96MB	(1) 8M x 36	(1) 8M x 36	(1) 8M x 36	None
128MB	(1) 16M x 36	(1) 16M 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	Bank 1	TAG
128KB	(4) 32K x 8	None	(1) 8K x 8
256KB (A)	(4) 32K x 8	(4) 32K x 8	(1) 16K/32K x 8
256KB (B)	(4) 64K x 8	None	(1) 16K/32K x 8
512KB	(4) 128K x 8	None	(1) 32K x 8

CACHE JUMPER CONFIGURATION
Size	JP1	JP3	JP33
128KB	Pins 1 & 2 closed	Pins 1 & 2, 3 & 4 closed	Pins 2 & 3 closed
256KB (A)	Pins 2 & 3 closed	Pins 2 & 3, 4 & 5 closed	Pins 2 & 3 closed
256KB (B)	Pins 1 & 2 closed	Pins 1 & 2, 3 & 4 closed	Pins 1 & 2 closed
512KB	Pins 1 & 2 closed	Pins 1 & 2, 3 & 4 closed	Pins 2 & 3 closed

CACHE TAG JUMPER CONFIGURATION
Cache	TAG	JP2	JP4
128KB	(1) 8K x 8	Pins 1 & 2 closed	Pins 1 & 2 closed
256KB (A,B)	(1) 16K x 8	Pins 3 & 4 closed	Open
256KB (A,B)	(1) 32K x 8	Pins 2 & 3 closed	Pins 1 & 2 closed
512KB	(1) 32K x 8	Pins 2 & 3 closed	Pins 2 & 3 closed

CPU SPEED SELECTION (AV9107-03)
Speed	JP5	JP6	JP7
20MHz	Closed	Open	Closed
25MHz	Closed	Closed	Open
33MHz	Open	Closed	Closed
40MHz	Closed	Open	Open
50iMHz	Closed	Closed	Open
50MHz	Open	Open	Closed
66iMHz	Open	Closed	Closed
75iMHz	Closed	Closed	Open
80iMHz	Closed	Open	Open
100iMHz	Open	Closed	Closed

CPU SPEED SELECTION (MS-8315)
Speed	JP5	JP6	JP7
20MHz	Open	Open	Open
25MHz	Open	Closed	Open
33MHz	Closed	Closed	Closed
40MHz	Open	Closed	Closed
50iMHz	Open	Closed	Open
50MHz	Closed	Open	Open
66iMHz	Closed	Closed	Closed
75iMHz	Open	Closed	Open
80iMHz	Open	Closed	Closed
100iMHz	Closed	Closed	Closed

CPU TYPE SELECTION
Type	JP8	JP10	JP11	JP12	JP13
CX486S	2 & 3	2 & 3	Open	2 & 3, 4 & 5	Open
UMC U5	1 & 2, 3 & 4	2 & 3	1 & 2, 3 & 4	Open	Open
80486SX	2 & 3	2 & 3	Open	3 & 4	1 & 2
SL80486SX	2 & 3	2 & 3	Open	3 & 4	1 & 2
CX486DX	1 & 2, 3 & 4	2 & 3	3 & 4	2 & 3	Open
80486DX	1 & 2, 3 & 4	2 & 3	3 & 4	3 & 4	1 & 2
SL80486DX	1 & 2, 3 & 4	2 & 3	3 & 4	3 & 4	1 & 2
CX486DX2	1 & 2, 3 & 4	2 & 3	3 & 4	2 & 3	Open
CX486DX2 (3.6v)	1 & 2, 3 & 4	2 & 3	3 & 4	2 & 3	Open
CX486DX2 (4v)	1 & 2, 3 & 4	2 & 3	3 & 4	2 & 3	Open
AM486DX2 (3.45v)	1 & 2, 3 & 4	2 & 3	3 & 4	Open	Open
(SL)AM486DX2 (3.45v)	1 & 2, 3 & 4	2 & 3	3 & 4	1 & 2, 3 & 4	2 & 3
80486DX2	1 & 2, 3 & 4	2 & 3	3 & 4	3 & 4	1 & 2
SL80486DX2	1 & 2, 3 & 4	2 & 3	3 & 4	3 & 4	1 & 2
AM486DX4 (3.45v)	1 & 2, 3 & 4	2 & 3	3 & 4	Open	Open
(SL)AM486DX4 (3.45v)	1 & 2, 3 & 4	2 & 3	3 & 4	1 & 2, 3 & 4	2 & 3
80486DX4	1 & 2, 3 & 4	2 & 3	3 & 4	3 & 4	1 & 2
P24D	1 & 2, 3 & 4	1 & 2	3 & 4	1 & 2, 3 & 4	2 & 3
P24T	1 & 2, 3 & 4	1 & 2	2 & 3	3 & 4	Open
Note: Pins designated should be in the closed position.

CPU TYPE SELECTION (CON’T)
Type	JP14	JP15	JP21	JP22	JP24	JP25
CX486S	1 & 2, 3 & 4	2 & 3	1 & 2	2 & 3	2 & 3	2 & 3
UMC U5	Open	Open	1 & 2	2 & 3	3 & 4	Open
80486SX	2 & 3	4 & 5	2 & 3	1 & 2	Open	Open
SL80486SX	2 & 3	4 & 5	2 & 3	1 & 2	Open	Open
CX486DX	1 & 2	2 & 3	1 & 2	2 & 3	2 & 3	2 & 3
80486DX	2 & 3	4 & 5	2 & 3	1 & 2	Open	Open
SL80486DX	2 & 3	4 & 5	2 & 3	1 & 2	Open	Open
CX486DX2	1 & 2	2 & 3	1 & 2	2 & 3	2 & 3	2 & 3
CX486DX2 (3.6v)	1 & 2	2 & 3	1 & 2	2 & 3	2 & 3	2 & 3
CX486DX2 (4v)	1 & 2	2 & 3	1 & 2	2 & 3	2 & 3	2 & 3
AM486DX2 (3.45v)	Open	Open	2 & 3	1 & 2	Open	Open
(SL)AM486DX2 (3.45v)	2 & 3	4 & 5	1 & 2	1 & 2	5 & 6	Open
80486DX2	2 & 3	4 & 5	2 & 3	1 & 2	Open	Open
SL80486DX2	2 & 3	4 & 5	2 & 3	1 & 2	Open	Open
AM486DX4 (3.45v)	Open	Open	2 & 3	1 & 2	Open	Open
(SL)AM486DX4 (3.45v)	2 & 3	4 & 5	1 & 2	1 & 2	Open	Open
80486DX4	2 & 3	4 & 5	2 & 3	1 & 2	Open	Open
P24D	2 & 3	4 & 5	1 & 2	1 & 2	Open	1 & 2
P24T	2 & 3	1 & 2	1 & 2	1 & 2	1 & 2	1 & 2
Note: Pins designated should be in the closed position.

CPU TYPE SELECTION (CON’T)
Type	JP30	JP31	JP34	JP35	JP36	JP38
CX486S	Open	Open	1 & 2	Closed	Open	Open
UMC U5	Open	Open	2 & 3	Closed	Open	Open
80486SX	Open	Open	1 & 2	Closed	Open	Open
SL80486SX	Open	Open	1 & 2	Closed	Open	Open
CX486DX	Open	Open	1 & 2	Closed	Open	Open
80486DX	Open	Open	1 & 2	Closed	Open	Open
SL80486DX	Open	Open	1 & 2	Closed	Open	Open
CX486DX2	Open	Open	1 & 2	Closed	Open	Open
CX486DX2 (3.6v)	Open	Open	1 & 2	Open	Open	1 & 2
CX486DX2 (4v)	Open	Open	1 & 2	Open	Open	2 & 3
AM486DX2 (3.45v)	2 & 3	Open	Open	Open	2 & 3	Open
(SL)AM486DX2 (3.45v)	1 & 2	1 & 2	1 & 2	Open	2 & 3	Open
80486DX2	Open	Open	1 & 2	Closed	Open	Open
SL80486DX2	Open	Open	1 & 2	Closed	Open	Open
AM486DX4 (3.45v)	Open	Open	Open	Open	2 & 3	Open
(SL)AM486DX4 (3.45v)	1 & 2	1 & 2	1 & 2	Open	2 & 3	Open
80486DX4	Open	Open	1 & 2	Open	1 & 2	Open
P24D	1 & 2	1 & 2	1 & 2	Closed	Open	Open
P24T	Open	Open	1 & 2	Closed	Open	Open
Note: Pins designated should be in the closed position.

VL BUS WAIT STATE SELECTION
Setting		JP28
	0	Pins 1 & 2 closed
»	1	Pins 2 & 3 closed

VL BUS SPEED SELECTION
Speed		JP29
	<= 33MHz	Pins 1 & 2 closed
»	>33 MHz	Pins 2 & 3 closed

FLASH BIOS SELECTION
Setting		JP37
»	EPROM	Open
	5v flash	Pins 2 & 3 closed
	12v flash	Pins 1 & 2 closed