4MHL3G Motherboard Settings and Configuration

EFA CORPORATION

4MHL3G

Processor
CXM6/SL80486SX/80486SX/SL80486DX/80486DX/ODP486SX/CXM7/ SL80486DX2/80486DX2/80486DX4/Pentium Overdrive
Processor Speed
25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz
Chip Set
Unidentified
Max. Onboard DRAM
128MB
Cache
64/128/256/512/1024KB
BIOS
AMI
Dimensions
330mm x 218mm
I/O Options
32-bit VESA local bus slots (3), green PC connector
NPU Options
None

CONNECTIONS
Purpose
Location
Purpose
Location
External battery
JP1
Turbo LED
JP52
Turbo switch
JP48
Turbo key
JP53
Reset switch
JP49
Green PC connector
JP54
Power LED & keylock
JP50
32-bit VESA local bus slots
SL1 - SL3
Speaker
JP51

USER CONFIGURABLE SETTINGS
Function
Jumper
Position
»
Monitor type select EGA
JP2
pins 2 & 3 closed

Monitor type select monochrome/VGA
JP2
pins 1 & 2 closed
»
Factory configured - do not alter
JP4
Open
»
CMOS memory normal operation
JP5
pins 1 & 2 closed

CMOS memory clear
JP5
pins 2 & 3 closed
»
Factory configured - do not alter
JP12
Open
»
Factory configured - do not alter
JP25
Open
»
DX slow down mode disabled
JP37
Open

DX slow down mode enabled
JP37
Closed
»
Factory configured - do not alter
JP38
Open
»
Factory configured - do not alter
JP45
Open
»
Factory configured - do not alter
JP55
Open
Note: The location of jumpers JP45 & JP55 are unidentified.

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
NONE
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
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
17MB
(1) 256K x 36
(1) 4M x 36
NONE
NONE
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) 1M x 36
(1) 4M x 36
NONE
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
32MB
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36

DRAM CONFIGURATION (CON’T)
Size
Bank 0
Bank 1
Bank 2
Bank 3
32MB
(1) 4M x 36
(1) 4M x 36
NONE
NONE
32MB
(1) 8M x 36
NONE
NONE
NONE
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
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
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
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
64KB
(4) 8K x 8
(4) 8K x 8
(1) 8K x 8
128KB
(4) 32K x 8
NONE
(1) 32K x 8
256KB
(4) 32K x 8
(4) 32K x 8
(1) 32K x 8
512KB
(4) 128K x 8
NONE
(1) 32K x 8
1MB
(4) 128K x 8
(4) 128K x 8
(1) 128K x 8

CACHE JUMPER CONFIGURATION
Size
JP9
JP27
JP28
JP35
JP41
JP42
JP43
64KB
1 & 2
2 & 3
Open
2 & 3
1 & 2
1 & 2
1 & 2
128KB
2 & 3
1 & 2
1 & 2, 3 & 4
2 & 3
1 & 2
1 & 2
2 & 3
256KB
1 & 2
1 & 2
2 & 3, 4 & 5
2 & 3
1 & 2
2 & 3
2 & 3
512KB
2 & 3
1 & 2
1 & 2, 3 & 4
2 & 3
2 & 3
2 & 3
2 & 3
1MB
1 & 2
1 & 2
2 & 3, 4 & 5
1 & 2
2 & 3
2 & 3
2 & 3
Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION
Type
JP7
JP11
JP16
JP17
JP18
JP19
CXM6
Open
1 & 2
2 & 3
2 & 3
2 & 3
2 & 3
SL80486SX
Closed
2 & 3
4 & 5
1 & 2
2 & 3
Open
80486SX
Open
Open
Open
Open
2 & 3
Open
ODP486SX
Open
Open
Open
Open
2 & 3
Open
SL80486DX
Closed
2 & 3
4 & 5
1 & 2
2 & 3
Open
80486DX
Open
Open
Open
Open
2 & 3
Open
CXM7
Open
1 & 2
2 & 3
2 & 3
2 & 3
2 & 3
SL80486DX2
Closed
2 & 3
4 & 5
1 & 2
2 & 3
Open
80486DX2
Open
Open
Open
Open
2 & 3
Open
80486DX4
Closed
2 & 3
4 & 5
1 & 2
2 & 3
Open
P24T
Open
2 & 3
1 & 2
1 & 2
1 & 2
1 & 2
Note: Pins designated should be in the closed postion.

CPU TYPE CONFIGURATION (CON’T)
Type
JP19
JP20
JP21
JP22
JP23
JP29
JP30
JP31
CXM6
2 & 3
1 & 2
2 & 3
Open
Open
2 & 3
1 & 2
2 & 3
SL80486SX
Open
Open
2 & 3
Open
Open
2 & 3
2 & 3
1 & 2
80486SX
Open
Open
2 & 3
Open
Open
2 & 3
2 & 3
1 & 2
ODP486SX
Open
Open
1 & 2
2 & 3
Closed
2 & 3
2 & 3
1 & 2
SL80486DX
Open
Open
1 & 2
1 & 2
Closed
2 & 3
2 & 3
1 & 2
80486DX
Open
Open
1 & 2
1 & 2
Closed
2 & 3
2 & 3
1 & 2
CXM7
2 & 3
1 & 2
1 & 2
1 & 2
Closed
2 & 3
1 & 2
2 & 3
SL80486DX2
Open
Open
1 & 2
1 & 2
Closed
2 & 3
2 & 3
1 & 2
80486DX2
Open
Open
1 & 2
1 & 2
Closed
2 & 3
2 & 3
1 & 2
80486DX4
Open
Open
1 & 2
1 & 2
Closed
2 & 3
2 & 3
1 & 2
P24T
1 & 2
2 & 3
1 & 2
2 & 3
Closed
2 & 3
2 & 3
2 & 3
Note: Pins designated should be in the closed postion. The location fof JP29 is unidentified.

CPU TYPE CONFIGURATION
Type
jp6
jp26
All CPU types
Open
pins 1 & 2 closed
80486DX4 only
pins 1 & 2 closed
pins 2 & 3 closed

CPU TYPE CONFIGURATION
Type
JP8
JP14
JP15
All CPU types
Open
Open
Open
P24D only
Closed
Closed
Closed

CPU TYPE CONFIGURATION
Type
JP10
All CPU types
Open
CX486DX-40
pins 2 & 3 closed
CX486DX2-50
pins 1 & 2 closed

CPU TYPE CONFIGURATION
Type
JP24
All CPU types
Open
CX M6/M7 CPU
Closed

CPU SPEED CONFIGURATION
Speed
JP32
JP33
JP34
20MHz
pins 1 & 2 closed
pins 2 & 3 closed
pins 2 & 3 closed
25MHz
pins 2 & 3 closed
pins 2 & 3 closed
pins 1 & 2 closed
33MHz
pins 2 & 3 closed
pins 1 & 2 closed
pins 2 & 3 closed
40MHz
pins 1 & 2 closed
pins 2 & 3 closed
pins 1 & 2 closed
50iMHz
pins 2 & 3 closed
pins 2 & 3 closed
pins 1 & 2 closed
50MHz
pins 1 & 2 closed
pins 1 & 2 closed
pins 2 & 3 closed
66iMHz
pins 2 & 3 closed
pins 1 & 2 closed
pins 2 & 3 closed
75iMHz
pins 2 & 3 closed
pins 2 & 3 closed
pins 1 & 2 closed
100iMHz
pins 2 & 3 closed
pins 1 & 2 closed
pins 2 & 3 closed

CPU VOLTAGE CONFIGURATION
Voltage
JP13
JP44
3.3v
pins 2 & 3, 5 & 6 closed
pins 1 & 2 closed
5.0v
pins 1 & 2, 4 & 5 closed
pins 2 & 3 closed

VESA WAIT STATE CONFIGURATION
Wait states
JP40
0 wait states
pins 1 & 2 closed
1 wait state
pins 2 & 3 closed

BUS SPEED CONFIGURATION
CPU speed
JP39
<= 33MHz
pins 1 & 2 closed
> 33MHz
pins 2 & 3 closed

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Processor	CXM6/SL80486SX/80486SX/SL80486DX/80486DX/ODP486SX/CXM7/ SL80486DX2/80486DX2/80486DX4/Pentium Overdrive
Processor Speed	25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz
Chip Set	Unidentified
Max. Onboard DRAM	128MB
Cache	64/128/256/512/1024KB
BIOS	AMI
Dimensions	330mm x 218mm
I/O Options	32-bit VESA local bus slots (3), green PC connector
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	JP1	Turbo LED	JP52
Turbo switch	JP48	Turbo key	JP53
Reset switch	JP49	Green PC connector	JP54
Power LED & keylock	JP50	32-bit VESA local bus slots	SL1 - SL3
Speaker	JP51

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Monitor type select EGA	JP2	pins 2 & 3 closed
	Monitor type select monochrome/VGA	JP2	pins 1 & 2 closed
»	Factory configured - do not alter	JP4	Open
»	CMOS memory normal operation	JP5	pins 1 & 2 closed
	CMOS memory clear	JP5	pins 2 & 3 closed
»	Factory configured - do not alter	JP12	Open
»	Factory configured - do not alter	JP25	Open
»	DX slow down mode disabled	JP37	Open
	DX slow down mode enabled	JP37	Closed
»	Factory configured - do not alter	JP38	Open
»	Factory configured - do not alter	JP45	Open
»	Factory configured - do not alter	JP55	Open
Note: The location of jumpers JP45 & JP55 are unidentified.

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	NONE
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
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
17MB	(1) 256K x 36	(1) 4M x 36	NONE	NONE
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) 1M x 36	(1) 4M x 36	NONE	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
32MB	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36

DRAM CONFIGURATION (CON’T)
Size	Bank 0	Bank 1	Bank 2	Bank 3
32MB	(1) 4M x 36	(1) 4M x 36	NONE	NONE
32MB	(1) 8M x 36	NONE	NONE	NONE
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
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
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
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
64KB	(4) 8K x 8	(4) 8K x 8	(1) 8K x 8
128KB	(4) 32K x 8	NONE	(1) 32K x 8
256KB	(4) 32K x 8	(4) 32K x 8	(1) 32K x 8
512KB	(4) 128K x 8	NONE	(1) 32K x 8
1MB	(4) 128K x 8	(4) 128K x 8	(1) 128K x 8

CACHE JUMPER CONFIGURATION
Size	JP9	JP27	JP28	JP35	JP41	JP42	JP43
64KB	1 & 2	2 & 3	Open	2 & 3	1 & 2	1 & 2	1 & 2
128KB	2 & 3	1 & 2	1 & 2, 3 & 4	2 & 3	1 & 2	1 & 2	2 & 3
256KB	1 & 2	1 & 2	2 & 3, 4 & 5	2 & 3	1 & 2	2 & 3	2 & 3
512KB	2 & 3	1 & 2	1 & 2, 3 & 4	2 & 3	2 & 3	2 & 3	2 & 3
1MB	1 & 2	1 & 2	2 & 3, 4 & 5	1 & 2	2 & 3	2 & 3	2 & 3
Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION
Type	JP7	JP11	JP16	JP17	JP18	JP19
CXM6	Open	1 & 2	2 & 3	2 & 3	2 & 3	2 & 3
SL80486SX	Closed	2 & 3	4 & 5	1 & 2	2 & 3	Open
80486SX	Open	Open	Open	Open	2 & 3	Open
ODP486SX	Open	Open	Open	Open	2 & 3	Open
SL80486DX	Closed	2 & 3	4 & 5	1 & 2	2 & 3	Open
80486DX	Open	Open	Open	Open	2 & 3	Open
CXM7	Open	1 & 2	2 & 3	2 & 3	2 & 3	2 & 3
SL80486DX2	Closed	2 & 3	4 & 5	1 & 2	2 & 3	Open
80486DX2	Open	Open	Open	Open	2 & 3	Open
80486DX4	Closed	2 & 3	4 & 5	1 & 2	2 & 3	Open
P24T	Open	2 & 3	1 & 2	1 & 2	1 & 2	1 & 2
Note: Pins designated should be in the closed postion.

CPU TYPE CONFIGURATION (CON’T)
Type	JP19	JP20	JP21	JP22	JP23	JP29	JP30	JP31
CXM6	2 & 3	1 & 2	2 & 3	Open	Open	2 & 3	1 & 2	2 & 3
SL80486SX	Open	Open	2 & 3	Open	Open	2 & 3	2 & 3	1 & 2
80486SX	Open	Open	2 & 3	Open	Open	2 & 3	2 & 3	1 & 2
ODP486SX	Open	Open	1 & 2	2 & 3	Closed	2 & 3	2 & 3	1 & 2
SL80486DX	Open	Open	1 & 2	1 & 2	Closed	2 & 3	2 & 3	1 & 2
80486DX	Open	Open	1 & 2	1 & 2	Closed	2 & 3	2 & 3	1 & 2
CXM7	2 & 3	1 & 2	1 & 2	1 & 2	Closed	2 & 3	1 & 2	2 & 3
SL80486DX2	Open	Open	1 & 2	1 & 2	Closed	2 & 3	2 & 3	1 & 2
80486DX2	Open	Open	1 & 2	1 & 2	Closed	2 & 3	2 & 3	1 & 2
80486DX4	Open	Open	1 & 2	1 & 2	Closed	2 & 3	2 & 3	1 & 2
P24T	1 & 2	2 & 3	1 & 2	2 & 3	Closed	2 & 3	2 & 3	2 & 3
Note: Pins designated should be in the closed postion. The location fof JP29 is unidentified.

CPU TYPE CONFIGURATION
Type	jp6	jp26
All CPU types	Open	pins 1 & 2 closed
80486DX4 only	pins 1 & 2 closed	pins 2 & 3 closed

CPU TYPE CONFIGURATION
Type	JP8	JP14	JP15
All CPU types	Open	Open	Open
P24D only	Closed	Closed	Closed

CPU TYPE CONFIGURATION
Type	JP10
All CPU types	Open
CX486DX-40	pins 2 & 3 closed
CX486DX2-50	pins 1 & 2 closed

CPU TYPE CONFIGURATION
Type	JP24
All CPU types	Open
CX M6/M7 CPU	Closed

CPU SPEED CONFIGURATION
Speed	JP32	JP33	JP34
20MHz	pins 1 & 2 closed	pins 2 & 3 closed	pins 2 & 3 closed
25MHz	pins 2 & 3 closed	pins 2 & 3 closed	pins 1 & 2 closed
33MHz	pins 2 & 3 closed	pins 1 & 2 closed	pins 2 & 3 closed
40MHz	pins 1 & 2 closed	pins 2 & 3 closed	pins 1 & 2 closed
50iMHz	pins 2 & 3 closed	pins 2 & 3 closed	pins 1 & 2 closed
50MHz	pins 1 & 2 closed	pins 1 & 2 closed	pins 2 & 3 closed
66iMHz	pins 2 & 3 closed	pins 1 & 2 closed	pins 2 & 3 closed
75iMHz	pins 2 & 3 closed	pins 2 & 3 closed	pins 1 & 2 closed
100iMHz	pins 2 & 3 closed	pins 1 & 2 closed	pins 2 & 3 closed

CPU VOLTAGE CONFIGURATION
Voltage	JP13	JP44
3.3v	pins 2 & 3, 5 & 6 closed	pins 1 & 2 closed
5.0v	pins 1 & 2, 4 & 5 closed	pins 2 & 3 closed

VESA WAIT STATE CONFIGURATION
Wait states	JP40
0 wait states	pins 1 & 2 closed
1 wait state	pins 2 & 3 closed

BUS SPEED CONFIGURATION
CPU speed	JP39
<= 33MHz	pins 1 & 2 closed
> 33MHz	pins 2 & 3 closed