|
|
MS-4138
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
|
|