MS-4138 Motherboard Settings and Configuration

ACHME COMPUTER, INC.

MS-4138

Processor
SL80486SX/80486SX/AM486DXL/CXM7/SL80486DX/80486DX/80486DX2/ Pentium Overdrive
Processor Speed
25/33/40/50(internal)/50/66(internal)MHz
Chip Set
SIS
Max. Onboard DRAM
32MB
Cache
128/256/512KB
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
External battery
JB
Reset switch
JFP pins 19 - 20
Power LED & keylock
JFP pins 1 - 5
Green PC connector (monitor)
JG1
Speaker
JFP pins 6 - 10
Green PC LED
JG2
Turbo LED
JFP pins 12 - 13
Green PC connector
JG3
Turbo switch
JFP pins 15 - 17
32-bit VESA local bus slots
SL1 - SL3

USER CONFIGURABLE SETTINGS
Function
Jumper
Position
»
Battery type select internal
JB
pins 2 & 3 closed

Battery type select external
JB
Closed
»
Factory configured - do not alter
JC5
N/A
»
Monitor type select monochrome
JP1
Open

Monitor type select color
JP1
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) 1M x 36
(1) 1M x 36
(1) 2M x 36
NONE
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) 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) 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
24MB
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
NONE
28MB
(1) 1M x 36
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
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
32MB
(1) 4M x 36
(1) 4M x 36
NONE
NONE

DRAM CONFIGURATION (CON’T)
Size
Bank 0
Bank 1
Bank 2
Bank 3
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
40MB
(1) 2M x 36
(1) 2M x 36
(1) 2M x 36
(1) 4M x 36
40MB
(1) 1M x 36
(1) 1M x 36
(1) 4M x 36
(1) 4M x 36
48MB
(1) 2M x 36
(1) 2M 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) 4M x 36
(1) 4M x 36
(1) 8M x 36
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) 8M x 36
(1) 8M x 36
80MB
(1) 2M x 36
(1) 2M x 36
(1) 8M x 36
(1) 8M x 36
80MB
(1) 4M x 36
(1) 8M x 36
(1) 8M 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) 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 or (1) 16K or (1) 32K x 8
256KB
(4) 32K x 8
(4) 32K x 8
(1) 16K or (1) 32K x 8
256KB
(4) 64K x 8
NONE
(1) 16K or (1) 32K x 8
512KB
(4) 128K x 8
NONE
(1) 32K x 8

CACHE JUMPER CONFIGURATION
Size
JS1
JS2
JS3
128KB
pins 1 & 2 closed
pins 1 & 2 closed
pins 1 & 2 closed
256KB
pins 2 & 3 closed
pins 2 & 3 closed
pins 1 & 2 closed
256KB
pins 2 & 3 closed
pins 1 & 2 closed
pins 1 & 2 closed
512KB
pins 2 & 3 closed
pins 1 & 2 closed
pins 2 & 3 closed

CPU TYPE CONFIGURATION
Type
JC1
JC2
SL80486SX
2 & 3, 7 & 8, 9 & 10, 12 & 13
10 & 11
80486SX
7 & 8
10 & 11
AM486DXL
7 & 8, 11 & 12
5 & 6, 7 & 8, 9 & 10, 11 & 12
CXM7
1 & 2, 3 & 12, 4 & 11, 5 & 10, 7 & 8
4 & 13, 7 & 8, 9 & 10, 11 & 12
SL80486DX
2 & 3, 7 & 8, 9 & 10, 12 & 13
7 & 8, 9 & 10, 11 & 12
80486DX
7 & 8
7 & 8, 9 & 10, 11 & 12
80486DX2
7 & 8
7 & 8, 9 & 10, 11 & 12
Pentium Overdrive
2 & 3, 7 & 8, 9 & 10, 12 & 13
6 & 7, 9 & 10, 11 & 12
Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CON’T)
Type
JC3
JC4
SL80486SX
pins 1 & 2 closed
pins 1 & 2 closed
80486SX
Open
pins 1 & 2 closed
AM486DXL
pins 2 & 3 closed
pins 3 & 4 closed
CXM7
pins 1 & 2 closed
pins 3 & 4 closed
SL80486DX
pins 1 & 2 closed
pins 1 & 2 closed
80486DX
pins 1 & 2 closed
pins 1 & 2 closed
80486DX2
pins 1 & 2 closed
pins 1 & 2 closed
Pentium Overdrive
pins 1 & 2 closed
pins 1 & 2 closed

CPU SPEED CONFIGURATION
Speed
JK1
JK2
25MHz
Open
pins 2 & 3 closed
33MHz
pins 2 & 5, 3 & 4 closed
pins 2 & 3 closed
40MHz
pins 3 & 4 closed
pins 2 & 3 closed
50iMHz
Open
pins 2 & 3 closed
50MHz
pins 1 & 6, 2 & 5 closed
pins 1 & 2 closed
66iMHz
pins 2 & 5, 3 & 4 closed
pins 2 & 3 closed

VESA WAIT STATE CONFIGURATION
Wait states
JP2
0 wait states
Open
1 wait state
Closed

BUS SPEED CONFIGURATION
CPU speed
JP3
<= 33MHz
Open
> 33MHz
Closed

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Processor	SL80486SX/80486SX/AM486DXL/CXM7/SL80486DX/80486DX/80486DX2/ Pentium Overdrive
Processor Speed	25/33/40/50(internal)/50/66(internal)MHz
Chip Set	SIS
Max. Onboard DRAM	32MB
Cache	128/256/512KB
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
External battery	JB	Reset switch	JFP pins 19 - 20
Power LED & keylock	JFP pins 1 - 5	Green PC connector (monitor)	JG1
Speaker	JFP pins 6 - 10	Green PC LED	JG2
Turbo LED	JFP pins 12 - 13	Green PC connector	JG3
Turbo switch	JFP pins 15 - 17	32-bit VESA local bus slots	SL1 - SL3

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Battery type select internal	JB	pins 2 & 3 closed
	Battery type select external	JB	Closed
»	Factory configured - do not alter	JC5	N/A
»	Monitor type select monochrome	JP1	Open
	Monitor type select color	JP1	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) 1M x 36	(1) 1M x 36	(1) 2M x 36	NONE
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) 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) 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
24MB	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36	NONE
28MB	(1) 1M x 36	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36
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
32MB	(1) 4M x 36	(1) 4M x 36	NONE	NONE

DRAM CONFIGURATION (CON’T)
Size	Bank 0	Bank 1	Bank 2	Bank 3
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
40MB	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36	(1) 4M x 36
40MB	(1) 1M x 36	(1) 1M x 36	(1) 4M x 36	(1) 4M x 36
48MB	(1) 2M x 36	(1) 2M 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) 4M x 36	(1) 4M x 36	(1) 8M x 36	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) 8M x 36	(1) 8M x 36
80MB	(1) 2M x 36	(1) 2M x 36	(1) 8M x 36	(1) 8M x 36
80MB	(1) 4M x 36	(1) 8M x 36	(1) 8M 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) 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 or (1) 16K or (1) 32K x 8
256KB	(4) 32K x 8	(4) 32K x 8	(1) 16K or (1) 32K x 8
256KB	(4) 64K x 8	NONE	(1) 16K or (1) 32K x 8
512KB	(4) 128K x 8	NONE	(1) 32K x 8

CACHE JUMPER CONFIGURATION
Size	JS1	JS2	JS3
128KB	pins 1 & 2 closed	pins 1 & 2 closed	pins 1 & 2 closed
256KB	pins 2 & 3 closed	pins 2 & 3 closed	pins 1 & 2 closed
256KB	pins 2 & 3 closed	pins 1 & 2 closed	pins 1 & 2 closed
512KB	pins 2 & 3 closed	pins 1 & 2 closed	pins 2 & 3 closed

CPU TYPE CONFIGURATION
Type	JC1	JC2
SL80486SX	2 & 3, 7 & 8, 9 & 10, 12 & 13	10 & 11
80486SX	7 & 8	10 & 11
AM486DXL	7 & 8, 11 & 12	5 & 6, 7 & 8, 9 & 10, 11 & 12
CXM7	1 & 2, 3 & 12, 4 & 11, 5 & 10, 7 & 8	4 & 13, 7 & 8, 9 & 10, 11 & 12
SL80486DX	2 & 3, 7 & 8, 9 & 10, 12 & 13	7 & 8, 9 & 10, 11 & 12
80486DX	7 & 8	7 & 8, 9 & 10, 11 & 12
80486DX2	7 & 8	7 & 8, 9 & 10, 11 & 12
Pentium Overdrive	2 & 3, 7 & 8, 9 & 10, 12 & 13	6 & 7, 9 & 10, 11 & 12
Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CON’T)
Type	JC3	JC4
SL80486SX	pins 1 & 2 closed	pins 1 & 2 closed
80486SX	Open	pins 1 & 2 closed
AM486DXL	pins 2 & 3 closed	pins 3 & 4 closed
CXM7	pins 1 & 2 closed	pins 3 & 4 closed
SL80486DX	pins 1 & 2 closed	pins 1 & 2 closed
80486DX	pins 1 & 2 closed	pins 1 & 2 closed
80486DX2	pins 1 & 2 closed	pins 1 & 2 closed
Pentium Overdrive	pins 1 & 2 closed	pins 1 & 2 closed

CPU SPEED CONFIGURATION
Speed	JK1	JK2
25MHz	Open	pins 2 & 3 closed
33MHz	pins 2 & 5, 3 & 4 closed	pins 2 & 3 closed
40MHz	pins 3 & 4 closed	pins 2 & 3 closed
50iMHz	Open	pins 2 & 3 closed
50MHz	pins 1 & 6, 2 & 5 closed	pins 1 & 2 closed
66iMHz	pins 2 & 5, 3 & 4 closed	pins 2 & 3 closed

VESA WAIT STATE CONFIGURATION
Wait states	JP2
0 wait states	Open
1 wait state	Closed

BUS SPEED CONFIGURATION
CPU speed	JP3
<= 33MHz	Open
> 33MHz	Closed