MB-4D50AV Motherboard Settings and Configuration

UNIDENTIFIED

MB-4D50AV

Processor
CXM6/SL80486SX/80486SX/CXM7/AM486DXLV-S/SL80486DX/80486DX/ 80486DX2/Pentium Overdrive
Processor Speed
25/33/40/50(internal)/50/66(internal)MHz
Chip Set
ALI
Max. Onboard DRAM
128MB
Cache
128/256KB
BIOS
AMI
Dimensions
254mm x 218mm
I/O Options
32-bit VESA local bus slots (3), green PC connector
NPU Options
None

CONNECTIONS
Purpose
Location
Purpose
Location
Reset switch
J1
Green PC connector
JP9
Turbo LED
J2
Green PC connector (monitor)
JP10
External battery
J3
Green PC connector-(external input)
JP32
Turbo switch
J4
Green PC connector-(ring input)
JP33
Power LED & keylock
J5
32-bit VESA local bus slots
SL1 - SL3
Speaker
J6

USER CONFIGURABLE SETTINGS
Function
Jumper
Position
»
Battery type select internal
J3
Open

Battery type select external
J3
Closed

CMOS memory clear
J3
pins 2 & 3 closed
»
Real time clock enabled
JP12
pins 1 & 2 closed

Real time clock disabled
JP12
pins 2 & 3 closed
»
Monitor type select color
JP13
Closed

Monitor type select monochrome
JP13
Open
»
CPU type select P24T/CXM6/CXM7 2x
JP20
Closed

CPU type select CXM6/CXM7 1x
JP20
Open

DRAM CONFIGURATION
Size
Bank 0
Bank 1
Bank 2
Bank 3
1MB
NONE
NONE
NONE
(1) 256K x 36
2MB
NONE
NONE
(1) 256K x 36
(1) 256K x 36
2MB
NONE
NONE
NONE
(1) 512K x 36
3MB
NONE
(1) 256K x 36
NONE
(1) 512K x 36
3MB
NONE
(1) 256K x 36
(1) 256K x 36
(1) 256K x 36
4MB
NONE
NONE
NONE
(1) 1M x 36
4MB
NONE
(1) 512K x 36
NONE
(1) 512K x 36
4MB
(1) 256K x 36
(1) 256K x 36
(1) 256K x 36
(1) 256K x 36
5MB
NONE
NONE
(1) 256K x 36
(1) 1M x 36
5MB
NONE
NONE
(1) 1M x 36
(1) 256K x 36
6MB
NONE
(1) 1M x 36
NONE
(1) 512K x 36
6MB
NONE
(1) 256K x 36
(1) 256K x 36
(1) 1M x 36
6MB
NONE
(1) 1M x 36
(1) 256K x 36
(1) 256K x 36
6MB
NONE
(1) 256K x 36
(1) 1M x 36
(1) 256K x 36
8MB
NONE
NONE
(1) 1M x 36
(1) 1M x 36
8MB
NONE
NONE
NONE
(1) 2M x 36
9MB
NONE
(1) 256K x 36
NONE
(1) 2M x 36
9MB
NONE
(1) 1M x 36
(1) 256K x 36
(1) 1M x 36
9MB
NONE
(1) 256K x 36
(1) 1M x 36
(1) 1M x 36
9MB
NONE
(1) 1M x 36
(1) 1M x 36
(1) 256K x 36
10MB
NONE
(1) 512K x 36
NONE
(1) 2M x 36
10MB
NONE
(1) 2M x 36
NONE
(1) 512K x 36
12MB
NONE
(1) 1M x 36
NONE
(1) 2M x 36
12MB
NONE
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
13MB
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
(1) 256K x 36
16MB
NONE
NONE
NONE
(1) 4M x 36
16MB
NONE
(1) 2M x 36
NONE
(1) 2M x 36
16MB
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
17MB
NONE
NONE
(1) 256K x 36
(1) 4M x 36
17MB
NONE
NONE
(1) 4M x 36
(1) 256K x 36
18MB
NONE
(1) 4M x 36
NONE
(1) 512K x 36
18MB
NONE
(1) 256K x 36
(1) 256K x 36
(1) 4M x 36

DRAM CONFIGURATION (CON’T)
Size
Bank 0
Bank 1
Bank 2
Bank 3
18MB
NONE
(1) 4M x 36
(1) 256K x 36
(1) 256K x 36
18MB
NONE
(1) 256K x 36
(1) 4M x 36
(1) 256K x 36
20MB
NONE
NONE
(1) 1M x 36
(1) 4M x 36
20MB
NONE
NONE
(1) 4M x 36
(1) 1M x 36
21MB
NONE
(1) 1M x 36
(1) 256K x 36
(1) 4M x 36
21MB
NONE
(1) 4M x 36
(1) 256K x 36
(1) 1M x 36
21MB
NONE
(1) 256K x 36
(1) 1M x 36
(1) 4M x 36
21MB
NONE
(1) 4M x 36
(1) 1M x 36
(1) 256K x 36
21MB
NONE
(1) 256K x 36
(1) 4M x 36
(1) 1M x 36
21MB
NONE
(1) 1M x 36
(1) 4M x 36
(1) 256K x 36
24MB
NONE
(1) 4M x 36
NONE
(1) 2M x 36
24MB
NONE
(1) 1M x 36
(1) 1M x 36
(1) 4M x 36
24MB
NONE
(1) 4M x 36
(1) 1M x 36
(1) 1M x 36
24MB
NONE
(1) 1M x 36
(1) 4M x 36
(1) 1M x 36
25MB
(1) 4M x 36
(1) 1M x 36
(1) 1M x 36
(1) 256K x 36
28MB
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
(1) 4M x 36
28MB
(1) 4M x 36
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
32MB
NONE
NONE
(1) 4M x 36
(1) 4M x 36
32MB
NONE
NONE
NONE
(1) 8M x 36
33MB
NONE
(1) 256K x 36
NONE
(1) 8M x 36
33MB
NONE
(1) 4M x 36
(1) 256K x 36
(1) 4M x 36
33MB
NONE
(1) 256K x 36
(1) 4M x 36
(1) 4M x 36
33MB
NONE
(1) 4M x 36
(1) 4M x 36
(1) 256K x 36
34MB
NONE
(1) 512K x 36
NONE
(1) 8M x 36
34MB
NONE
(1) 8M x 36
NONE
(1) 512K x 36
36MB
NONE
(1) 1M x 36
NONE
(1) 8M x 36
36MB
NONE
(1) 4M x 36
(1) 1M x 36
(1) 4M x 36
36MB
NONE
(1) 1M x 36
(1) 4M x 36
(1) 4M x 36
36MB
NONE
(1) 4M x 36
(1) 4M x 36
(1) 1M x 36
36MB
(1) 4M x 36
(1) 1M x 36
(1) 1M x 36
(1) 4M x 36
40MB
NONE
(1) 2M x 36
NONE
(1) 8M x 36
40MB
NONE
(1) 8M x 36
NONE
(1) 2M x 36
48MB
NONE
(1) 4M x 36
NONE
(1) 8M x 36
48MB
NONE
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36
49MB
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36
(1) 256K x 36
52MB
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36
(1) 1M x 36
64MB
NONE
NONE
NONE
(1) 16M x 36
64MB
NONE
(1) 8M x 36
NONE
(1) 8M x 36
64MB
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36
65MB
NONE
NONE
(1) 256K x 36
(1) 16M x 36
65MB
NONE
NONE
(1) 16M x 36
(1) 256K x 36
66MB
NONE
(1) 16M x 36
NONE
(1) 512K x 36

DRAM CONFIGURATION (CON’T)
Size
Bank 0
Bank 1
Bank 2
Bank 3
66MB
NONE
(1) 256K x 36
(1) 256K x 36
(1) 16M x 36
66MB
NONE
(1) 16M x 36
(1) 256K x 36
(1) 256K x 36
66MB
NONE
(1) 256K x 36
(1) 16M x 36
(1) 256K x 36
68MB
NONE
NONE
(1) 1M x 36
(1) 16M x 36
68MB
NONE
NONE
(1) 16M x 36
(1) 1M x 36
69MB
NONE
(1) 1M x 36
(1) 256K x 36
(1) 16M x 36
69MB
NONE
(1) 16M x 36
(1) 256K x 36
(1) 1M x 36
69MB
NONE
(1) 256K x 36
(1) 1M x 36
(1) 16M x 36
69MB
NONE
(1) 16M x 36
(1) 1M x 36
(1) 256K x 36
69MB
NONE
(1) 256K x 36
(1) 16M x 36
(1) 1M x 36
69MB
NONE
(1) 1M x 36
(1) 16M x 36
(1) 256K x 36
72MB
NONE
(1) 16M x 36
NONE
(1) 2M x 36
72MB
NONE
(1) 1M x 36
(1) 1M x 36
(1) 16M x 36
72MB
NONE
(1) 16M x 36
(1) 1M x 36
(1) 1M x 36
76MB
(1) 1M x 36
(1) 1M x 36
(1) 1M x 36
(1) 16M x 36
80MB
NONE
NONE
(1) 4M x 36
(1) 16M x 36
80MB
NONE
(1) 1M x 36
(1) 16M x 36
(1) 1M x 36
81MB
NONE
(1) 16M x 36
(1) 256K x 36
(1) 4M x 36
81MB
NONE
(1) 256K x 36
(1) 4M x 36
(1) 16M x 36
81MB
NONE
(1) 256K x 36
(1) 16M x 36
(1) 4M x 36
81MB
NONE
(1) 4M x 36
(1) 16M x 36
(1) 256K x 36
84MB
NONE
(1) 4M x 36
(1) 1M x 36
(1) 16M x 36
84MB
NONE
(1) 16M x 36
(1) 1M x 36
(1) 4M x 36
84MB
NONE
(1) 1M x 36
(1) 4M x 36
(1) 16M x 36
84MB
NONE
(1) 16M x 36
(1) 4M x 36
(1) 1M x 36
84MB
NONE
(1) 1M x 36
(1) 16M x 36
(1) 4M x 36
84MB
NONE
(1) 4M x 36
(1) 16M x 36
(1) 1M x 36
88MB
(1) 4M x 36
(1) 1M x 36
(1) 1M x 36
(1) 16M x 36
96MB
NONE
(1) 16M x 36
NONE
(1) 8M x 36
96MB
NONE
(1) 4M x 36
(1) 4M x 36
(1) 16M x 36
96MB
NONE
(1) 16M x 36
(1) 4M x 36
(1) 4M x 36
96MB
NONE
(1) 4M x 36
(1) 16M x 36
(1) 4M x 36
97MB
(1) 16M x 36
(1) 4M x 36
(1) 4M x 36
(1) 256K x 36
100MB
(1) 16M x 36
(1) 4M x 36
(1) 4M x 36
(1) 1M x 36
112MB
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36
(1) 16M x 36
112MB
(1) 16M x 36
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36
112MB
(1) 4M x 36
(1) 4M x 36
(1) 4M x 36
(1) 16M x 36
128MB
NONE
NONE
(1) 16M x 36
(1) 16M x 36

CACHE CONFIGURATION
Size
Bank 0
Bank 1
TAG
128KB
(4) 32K x 8
NONE
(1) 8K x 8 or (1) 32K x 8
256KB
(4) 32K x 8
(4) 32K x 8
(1) 32K x 8

CACHE JUMPER CONFIGURATION
Size
JP3
JP4
128KB
pins 2 & 3 closed
pins 2 & 3 closed
256KB
pins 1 & 2 closed
pins 1 & 2 closed

CPU TYPE CONFIGURATION
Type
JP8
JP16
JP17
JP18
JP19
CX M6
5 & 6
Open
Open
Closed
Open
SL80486SX
1 & 2
Closed
Closed
Open
Closed
80486SX
Open
Closed
Closed
Open
Open
CX M7
5 & 6
Closed
Open
Closed
Open
AM486DXLV-S
3 & 4
Closed
Closed
Open
Open
SL80486DX
1 & 2
Closed
Closed
Open
Closed
80486DX
Open
Closed
Closed
Open
Open
80486DX2
Open
Closed
Closed
Open
Open
Pentium Overdrive
1 & 2
Closed
Closed
Open
Open
Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CON’T)
Type
JP21
JP22
JP23
JP24
JP25
CX M6
1 & 2
Open
2 & 3
1 & 2
1 & 2
SL80486SX
1 & 2
Open
1 & 2
2 & 3
1 & 2
80486SX
1 & 2
Open
2 & 3
Open
1 & 2
CX M7
2 & 3
2 & 3
2 & 3
1 & 2
1 & 2
AM486DXLV-S
2 & 3
2 & 3
2 & 3
Open
1 & 2
SL80486DX
2 & 3
2 & 3
1 & 2
2 & 3
1 & 2
80486DX
2 & 3
2 & 3
2 & 3
Open
1 & 2
80486DX2
2 & 3
2 & 3
2 & 3
Open
1 & 2
Pentium Overdrive
2 & 3
1 & 2
1 & 2
2 & 3
2 & 3
Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CON’T)
Type
JP27
JP28
JP29
JP30
JP31
CX M6
Closed
Open
Closed
4 & 5
4 & 5
SL80486SX
Open
Open
Open
1 & 2
1 & 2
80486SX
Open
Open
Closed
Open
Open
CX M7
Closed
Open
Closed
4 & 5
4 & 5
AM486DXLV-S
Open
Open
Open
2 & 3
2 & 3
SL80486DX
Open
Open
Open
1 & 2
1 & 2
80486DX
Open
Open
Closed
Open
Open
80486DX2
Open
Open
Closed
Open
Open
Pentium Overdrive
Open
Closed
Open
1 & 2
1 & 2
Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION
Type
JP40
80486
pins 1 & 2 closed, pins 3 & 4 open
Note: The location of JP40 is unidentified.

CPU SPEED CONFIGURATION
Speed
JP7
JP26
JP35
JP36
25MHz
pins 1 & 2, 5 & 6 closed
pins 1 & 2 closed
pins 1 & 2 closed
pins 1 & 2 closed
33MHz
pins 3 & 4, 5 & 6 closed
pins 1 & 2 closed
pins 1 & 2 closed
pins 1 & 2 closed
40MHz
pins 1 & 2, 3 & 4 closed
pins 2 & 3 closed
pins 2 & 3 closed
pins 2 & 3 closed
50iMHz
pins 1 & 2, 5 & 6 closed
pins 1 & 2 closed
pins 1 & 2 closed
pins 1 & 2 closed
50MHz
pins 1 & 2, 5 & 6 closed
pins 2 & 3 closed
pins 2 & 3 closed
pins 2 & 3 closed
66iMHz
pins 3 & 4, 5 & 6 closed
pins 1 & 2 closed
pins 1 & 2 closed
pins 1 & 2 closed

VESA WAIT STATE CONFIGURATION
Wait states
JP40
0 wait states
pins 5 & 6 open
1 wait state
pins 5 & 6 closed
Note: The location of JP40 is unidentified.

BUS SPEED CONFIGURATION
CPU speed
JP40
<= 33MHz
pins 7 & 8 open
> 33MHz
pins 7 & 8 closed
Note: The location of JP40 is unidentified.

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Processor	CXM6/SL80486SX/80486SX/CXM7/AM486DXLV-S/SL80486DX/80486DX/ 80486DX2/Pentium Overdrive
Processor Speed	25/33/40/50(internal)/50/66(internal)MHz
Chip Set	ALI
Max. Onboard DRAM	128MB
Cache	128/256KB
BIOS	AMI
Dimensions	254mm x 218mm
I/O Options	32-bit VESA local bus slots (3), green PC connector
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
Reset switch	J1	Green PC connector	JP9
Turbo LED	J2	Green PC connector (monitor)	JP10
External battery	J3	Green PC connector-(external input)	JP32
Turbo switch	J4	Green PC connector-(ring input)	JP33
Power LED & keylock	J5	32-bit VESA local bus slots	SL1 - SL3
Speaker	J6

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Battery type select internal	J3	Open
	Battery type select external	J3	Closed
	CMOS memory clear	J3	pins 2 & 3 closed
»	Real time clock enabled	JP12	pins 1 & 2 closed
	Real time clock disabled	JP12	pins 2 & 3 closed
»	Monitor type select color	JP13	Closed
	Monitor type select monochrome	JP13	Open
»	CPU type select P24T/CXM6/CXM7 2x	JP20	Closed
	CPU type select CXM6/CXM7 1x	JP20	Open

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
1MB	NONE	NONE	NONE	(1) 256K x 36
2MB	NONE	NONE	(1) 256K x 36	(1) 256K x 36
2MB	NONE	NONE	NONE	(1) 512K x 36
3MB	NONE	(1) 256K x 36	NONE	(1) 512K x 36
3MB	NONE	(1) 256K x 36	(1) 256K x 36	(1) 256K x 36
4MB	NONE	NONE	NONE	(1) 1M x 36
4MB	NONE	(1) 512K x 36	NONE	(1) 512K x 36
4MB	(1) 256K x 36	(1) 256K x 36	(1) 256K x 36	(1) 256K x 36
5MB	NONE	NONE	(1) 256K x 36	(1) 1M x 36
5MB	NONE	NONE	(1) 1M x 36	(1) 256K x 36
6MB	NONE	(1) 1M x 36	NONE	(1) 512K x 36
6MB	NONE	(1) 256K x 36	(1) 256K x 36	(1) 1M x 36
6MB	NONE	(1) 1M x 36	(1) 256K x 36	(1) 256K x 36
6MB	NONE	(1) 256K x 36	(1) 1M x 36	(1) 256K x 36
8MB	NONE	NONE	(1) 1M x 36	(1) 1M x 36
8MB	NONE	NONE	NONE	(1) 2M x 36
9MB	NONE	(1) 256K x 36	NONE	(1) 2M x 36
9MB	NONE	(1) 1M x 36	(1) 256K x 36	(1) 1M x 36
9MB	NONE	(1) 256K x 36	(1) 1M x 36	(1) 1M x 36
9MB	NONE	(1) 1M x 36	(1) 1M x 36	(1) 256K x 36
10MB	NONE	(1) 512K x 36	NONE	(1) 2M x 36
10MB	NONE	(1) 2M x 36	NONE	(1) 512K x 36
12MB	NONE	(1) 1M x 36	NONE	(1) 2M x 36
12MB	NONE	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
13MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	(1) 256K x 36
16MB	NONE	NONE	NONE	(1) 4M x 36
16MB	NONE	(1) 2M x 36	NONE	(1) 2M x 36
16MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
17MB	NONE	NONE	(1) 256K x 36	(1) 4M x 36
17MB	NONE	NONE	(1) 4M x 36	(1) 256K x 36
18MB	NONE	(1) 4M x 36	NONE	(1) 512K x 36
18MB	NONE	(1) 256K x 36	(1) 256K x 36	(1) 4M x 36

DRAM CONFIGURATION (CON’T)
Size	Bank 0	Bank 1	Bank 2	Bank 3
18MB	NONE	(1) 4M x 36	(1) 256K x 36	(1) 256K x 36
18MB	NONE	(1) 256K x 36	(1) 4M x 36	(1) 256K x 36
20MB	NONE	NONE	(1) 1M x 36	(1) 4M x 36
20MB	NONE	NONE	(1) 4M x 36	(1) 1M x 36
21MB	NONE	(1) 1M x 36	(1) 256K x 36	(1) 4M x 36
21MB	NONE	(1) 4M x 36	(1) 256K x 36	(1) 1M x 36
21MB	NONE	(1) 256K x 36	(1) 1M x 36	(1) 4M x 36
21MB	NONE	(1) 4M x 36	(1) 1M x 36	(1) 256K x 36
21MB	NONE	(1) 256K x 36	(1) 4M x 36	(1) 1M x 36
21MB	NONE	(1) 1M x 36	(1) 4M x 36	(1) 256K x 36
24MB	NONE	(1) 4M x 36	NONE	(1) 2M x 36
24MB	NONE	(1) 1M x 36	(1) 1M x 36	(1) 4M x 36
24MB	NONE	(1) 4M x 36	(1) 1M x 36	(1) 1M x 36
24MB	NONE	(1) 1M x 36	(1) 4M x 36	(1) 1M x 36
25MB	(1) 4M x 36	(1) 1M x 36	(1) 1M x 36	(1) 256K x 36
28MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	(1) 4M x 36
28MB	(1) 4M x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
32MB	NONE	NONE	(1) 4M x 36	(1) 4M x 36
32MB	NONE	NONE	NONE	(1) 8M x 36
33MB	NONE	(1) 256K x 36	NONE	(1) 8M x 36
33MB	NONE	(1) 4M x 36	(1) 256K x 36	(1) 4M x 36
33MB	NONE	(1) 256K x 36	(1) 4M x 36	(1) 4M x 36
33MB	NONE	(1) 4M x 36	(1) 4M x 36	(1) 256K x 36
34MB	NONE	(1) 512K x 36	NONE	(1) 8M x 36
34MB	NONE	(1) 8M x 36	NONE	(1) 512K x 36
36MB	NONE	(1) 1M x 36	NONE	(1) 8M x 36
36MB	NONE	(1) 4M x 36	(1) 1M x 36	(1) 4M x 36
36MB	NONE	(1) 1M x 36	(1) 4M x 36	(1) 4M x 36
36MB	NONE	(1) 4M x 36	(1) 4M x 36	(1) 1M x 36
36MB	(1) 4M x 36	(1) 1M x 36	(1) 1M x 36	(1) 4M x 36
40MB	NONE	(1) 2M x 36	NONE	(1) 8M x 36
40MB	NONE	(1) 8M x 36	NONE	(1) 2M x 36
48MB	NONE	(1) 4M x 36	NONE	(1) 8M x 36
48MB	NONE	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36
49MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	(1) 256K x 36
52MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	(1) 1M x 36
64MB	NONE	NONE	NONE	(1) 16M x 36
64MB	NONE	(1) 8M x 36	NONE	(1) 8M x 36
64MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36
65MB	NONE	NONE	(1) 256K x 36	(1) 16M x 36
65MB	NONE	NONE	(1) 16M x 36	(1) 256K x 36
66MB	NONE	(1) 16M x 36	NONE	(1) 512K x 36

CACHE CONFIGURATION
Size	Bank 0	Bank 1	TAG
128KB	(4) 32K x 8	NONE	(1) 8K x 8 or (1) 32K x 8
256KB	(4) 32K x 8	(4) 32K x 8	(1) 32K x 8

CACHE JUMPER CONFIGURATION
Size	JP3	JP4
128KB	pins 2 & 3 closed	pins 2 & 3 closed
256KB	pins 1 & 2 closed	pins 1 & 2 closed

CPU TYPE CONFIGURATION
Type	JP8	JP16	JP17	JP18	JP19
CX M6	5 & 6	Open	Open	Closed	Open
SL80486SX	1 & 2	Closed	Closed	Open	Closed
80486SX	Open	Closed	Closed	Open	Open
CX M7	5 & 6	Closed	Open	Closed	Open
AM486DXLV-S	3 & 4	Closed	Closed	Open	Open
SL80486DX	1 & 2	Closed	Closed	Open	Closed
80486DX	Open	Closed	Closed	Open	Open
80486DX2	Open	Closed	Closed	Open	Open
Pentium Overdrive	1 & 2	Closed	Closed	Open	Open
Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CON’T)
Type	JP21	JP22	JP23	JP24	JP25
CX M6	1 & 2	Open	2 & 3	1 & 2	1 & 2
SL80486SX	1 & 2	Open	1 & 2	2 & 3	1 & 2
80486SX	1 & 2	Open	2 & 3	Open	1 & 2
CX M7	2 & 3	2 & 3	2 & 3	1 & 2	1 & 2
AM486DXLV-S	2 & 3	2 & 3	2 & 3	Open	1 & 2
SL80486DX	2 & 3	2 & 3	1 & 2	2 & 3	1 & 2
80486DX	2 & 3	2 & 3	2 & 3	Open	1 & 2
80486DX2	2 & 3	2 & 3	2 & 3	Open	1 & 2
Pentium Overdrive	2 & 3	1 & 2	1 & 2	2 & 3	2 & 3
Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CON’T)
Type	JP27	JP28	JP29	JP30	JP31
CX M6	Closed	Open	Closed	4 & 5	4 & 5
SL80486SX	Open	Open	Open	1 & 2	1 & 2
80486SX	Open	Open	Closed	Open	Open
CX M7	Closed	Open	Closed	4 & 5	4 & 5
AM486DXLV-S	Open	Open	Open	2 & 3	2 & 3
SL80486DX	Open	Open	Open	1 & 2	1 & 2
80486DX	Open	Open	Closed	Open	Open
80486DX2	Open	Open	Closed	Open	Open
Pentium Overdrive	Open	Closed	Open	1 & 2	1 & 2
Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION
Type	JP40
80486	pins 1 & 2 closed, pins 3 & 4 open
Note: The location of JP40 is unidentified.

CPU SPEED CONFIGURATION
Speed	JP7	JP26	JP35	JP36
25MHz	pins 1 & 2, 5 & 6 closed	pins 1 & 2 closed	pins 1 & 2 closed	pins 1 & 2 closed
33MHz	pins 3 & 4, 5 & 6 closed	pins 1 & 2 closed	pins 1 & 2 closed	pins 1 & 2 closed
40MHz	pins 1 & 2, 3 & 4 closed	pins 2 & 3 closed	pins 2 & 3 closed	pins 2 & 3 closed
50iMHz	pins 1 & 2, 5 & 6 closed	pins 1 & 2 closed	pins 1 & 2 closed	pins 1 & 2 closed
50MHz	pins 1 & 2, 5 & 6 closed	pins 2 & 3 closed	pins 2 & 3 closed	pins 2 & 3 closed
66iMHz	pins 3 & 4, 5 & 6 closed	pins 1 & 2 closed	pins 1 & 2 closed	pins 1 & 2 closed

VESA WAIT STATE CONFIGURATION
Wait states	JP40
0 wait states	pins 5 & 6 open
1 wait state	pins 5 & 6 closed
Note: The location of JP40 is unidentified.

BUS SPEED CONFIGURATION
CPU speed	JP40
<= 33MHz	pins 7 & 8 open
> 33MHz	pins 7 & 8 closed
Note: The location of JP40 is unidentified.