ACHME COMPUTER, INC.
MS-4131G (VLB 486 AL2G)
Processor | 80486SX/80487SX/CX486M7/AMD486DX/AMD486DXL/80486DX/80486DX2/ Pentium Overdrive |
Processor Speed | 20/25/33/40/50(internal)/50/66(internal)66MHz |
Chip Set | ALI |
Max. Onboard DRAM | 64MB |
Cache | 128/256/512KB |
BIOS | AMI/Award/Phoenix |
Dimensions | 260mm 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 | JB | Reset switch | JFP pins 19 - 20 |
Power LED & keylock | JFP pins 1 -5 | Green PC connector (monitor) | JG1 |
Speaker | JFP pins 7 - 10 | Green PC LED connector | JG2 |
Turbo LED | JFP pins 12 - 13 | Green PC connector (sleep mode) | JG3 |
Turbo switch | JFP pins 15 - 17 | 32-bit VESA Local bus slots | SL1 - SL3 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | On board battery installed | JB | pins 2 & 3 closed |
External battery installed | JB | pins 1 & 2, 3 & 4 closed | |
» | PQFP CPU disabled | JC4 | Closed |
PQFP CPU enabled | JC4 | Open | |
» | Factory configured - do not alter | JC6 | N/A |
» | Monitor type select monochrome | JP1 | pins 1 & 2 closed |
Monitor type select color | JP1 | pins 2 & 3 closed |
DRAM CONFIGURATION | |||
Size | Bank 0 | Bank 1 | Bank 2 |
1MB | (4) 256K x 9 | NONE | NONE |
1MB | NONE | (1) 256K x 36 | NONE |
1MB | NONE | NONE | (1) 256K x 36 |
2MB | NONE | NONE | (1) 512K x 36 |
2MB | NONE | (1) 512K x 36 | NONE |
2MB | NONE | (1) 256K x 36 | (1) 256K x 36 |
2MB | (4) 256K x 9 | (1) 256K x 36 | NONE |
3MB | (4) 256K x 9 | (1) 256K x 36 | (1) 256K x 36 |
3MB | NONE | (1) 256K x 36 | (1) 512K x 36 |
4MB | (4) 256K x 9 | (1) 256K x 36 | (1) 512K x 36 |
4MB | (4) 1M x 9 | NONE | NONE |
4MB | NONE | (1) 512K x 36 | (1) 512K x 36 |
4MB | NONE | (1) 1M x 36 | NONE |
4MB | NONE | NONE | (1) 1M x 36 |
5MB | NONE | (1) 256K x 36 | (1) 1M x 36 |
5MB | (4) 256K x 9 | (1) 1M x 36 | NONE |
5MB | (4) 1M x 9 | (1) 256K x 36 | NONE |
6MB | (4) 256K x 9 | (1) 1M x 36 | (1) 256K x 36 |
6MB | (4) 256K x 9 | (1) 256K x 36 | (1) 1M x 36 |
6MB | (4) 1M x 9 | (1) 256K x 36 | (1) 256K x 36 |
6MB | NONE | (1) 512K x 36 | (1) 1M x 36 |
7MB | (4) 256K x 9 | (1) 1M x 36 | (1) 512K x 36 |
7MB | (4) 1M x 9 | (1) 256K x 36 | (1) 512K x 36 |
8MB | NONE | NONE | (1) 2M x 36 |
8MB | NONE | (1) 2M x 36 | NONE |
8MB | NONE | (1) 1M x 36 | (1) 1M x 36 |
8MB | (4) 1M x 9 | (1) 1M x 36 | NONE |
9MB | (4) 256K x 9 | (1) 1M x 36 | (1) 1M x 36 |
9MB | (4) 1M x 9 | (1) 256K x 36 | (1) 1M x 36 |
9MB | (4) 1M x 9 | (1) 1M x 36 | (1) 256K x 36 |
9MB | NONE | (1) 256K x 36 | (1) 2M x 36 |
10MB | (4) 1M x 9 | (1) 1M x 36 | (1) 512K x 36 |
10MB | (4) 256K x 9 | (1) 256K x 36 | (1) 2M x 36 |
DRAM CONFIGURATION (CON’T) | |||
Size | Bank 0 | Bank 1 | Bank 2 |
10MB | NONE | (1) 512K x 36 | (1) 2M x 36 |
12MB | (4) 1M x 9 | (1) 1M x 36 | (1) 1M x 36 |
12MB | NONE | (1) 1M x 36 | (1) 2M x 36 |
13MB | (4) 1M x 9 | (1) 256K x 36 | (1) 2M x 36 |
13MB | (4) 256K x 9 | (1) 1M x 36 | (1) 2M x 36 |
16MB | NONE | NONE | (1) 4M x 36 |
16MB | NONE | (1) 4M x 36 | NONE |
16MB | NONE | (1) 2M x 36 | (1) 2M x 36 |
16MB | (4) 1M x 9 | (1) 1M x 36 | (1) 2M x 36 |
17MB | (4) 256K x 9 | (1) 4M x 36 | NONE |
17MB | NONE | (1) 256K x 36 | (1) 4M x 36 |
18MB | NONE | (1) 512K x 36 | (1) 4M x 36 |
18MB | (4) 256K x 9 | (1) 256K x 36 | (1) 4M x 36 |
18MB | (4) 256K x 9 | (1) 4M x 36 | (1) 256K x 36 |
19MB | (4) 256K x 9 | (1) 4M x 36 | (1) 512K x 36 |
20MB | (4) 1M x 9 | (1) 4M x 36 | NONE |
20MB | NONE | (1) 1M x 36 | (1) 4M x 36 |
21MB | (4) 256K x 9 | (1) 1M x 36 | (1) 4M x 36 |
21MB | (4) 1M x 9 | (1) 256K x 36 | (1) 4M x 36 |
21MB | (4) 256K x 9 | (1) 4M x 36 | (1) 1M x 36 |
21MB | (4) 1M x 9 | (1) 4M x 36 | (1) 256K x 36 |
21MB | (4) 4M x 9 | (1) 256K x 36 | (1) 1M x 36 |
21MB | (4) 1M x 9 | (1) 256K x 36 | (1) 8M x 36 |
22MB | (4) 1M x 9 | (1) 4M x 36 | (1) 512K x 36 |
24MB | (4) 4M x 9 | (1) 1M x 36 | (1) 1M x 36 |
24MB | (4) 1M x 9 | (1) 4M x 36 | (1) 1M x 36 |
24MB | (4) 1M x 9 | (1) 1M x 36 | (1) 4M x 36 |
24MB | NONE | (1) 2M x 36 | (1) 4M x 36 |
25MB | (4) 256K x 9 | (1) 4M x 36 | (1) 2M x 36 |
25MB | (4) 4M x 9 | (1) 256K x 36 | (1) 2M x 36 |
28MB | (4) 1M x 9 | (1) 4M x 36 | (1) 2M x 36 |
28MB | (4) 4M x 9 | (1) 1M x 36 | (1) 2M x 36 |
32MB | (4) 4M x 9 | NONE | (1) 4M x 36 |
32MB | NONE | (1) 4M x 36 | (1) 4M x 36 |
32MB | NONE | (1) 8M x 36 | NONE |
32MB | NONE | NONE | (1) 8M x 36 |
32MB | (4) 4M x 9 | (1) 4M x 36 | NONE |
33MB | (4) 4M x 9 | (1) 4M x 36 | (1) 256K x 36 |
33MB | (4) 4M x 9 | (1) 256K x 36 | (1) 4M x 36 |
33MB | (4) 256K x 9 | (1) 4M x 36 | (1) 4M x 36 |
33MB | NONE | (1) 256K x 36 | (1) 8M x 36 |
33MB | (4) 4M x 9 | (1) 256K x 36 | (1) 4M x 36 |
34MB | (4) 4M x 9 | (1) 256K x 36 | (1) 256K x 36 |
34MB | (4) 4M x 9 | (1) 4M x 36 | (1) 512K x 36 |
DRAM CONFIGURATION (CON’T) | |||
Size | Bank 0 | Bank 1 | Bank 2 |
34MB | (4) 256K x 9 | (1) 256K x 36 | (1) 8M x 36 |
34MB | NONE | (1) 512K x 36 | (1) 8M x 36 |
36MB | (4) 1M x 9 | (1) 4M x 36 | (1) 4M x 36 |
36MB | (4) 4M x 9 | (1) 1M x 36 | (1) 4M x 36 |
36MB | (4) 4M x 9 | (1) 4M x 36 | (1) 1M x 36 |
36MB | NONE | (1) 1M x 36 | (1) 8M x 36 |
37MB | (4) 256K x 9 | (1) 1M x 36 | (1) 8M x 36 |
37MB | (4) 256K x 9 | (1) 1M x 36 | (1) 8M x 36 |
37MB | (4) 4M x 9 | (1) 1M x 36 | (1) 256K x 36 |
40MB | (4) 1M x 9 | (1) 1M x 36 | (1) 8M x 36 |
40MB | (4) 4M x 9 | (1) 4M x 36 | (1) 2M x 36 |
40MB | NONE | (1) 2M x 36 | (1) 8M x 36 |
48MB | (4) 4M x 9 | (1) 4M x 36 | (1) 4M x 36 |
48MB | NONE | (1) 4M x 36 | (1) 8M x 36 |
49MB | (4) 256K x 9 | (1) 4M x 36 | (1) 8M x 36 |
49MB | (4) 4M x 9 | (1) 256K x 36 | (1) 8M x 36 |
52MB | (4) 1M x 9 | (1) 4M x 36 | (1) 8M x 36 |
64MB | NONE | (1) 8M x 36 | (1) 8M x 36 |
64MB | (4) 4M x 9 | (1) 4M x 36 | (1) 8M x 36 |
CACHE CONFIGURATION | |||
Size | Bank 0 | Bank 1 | TAG |
128KB | (4) 32K x 8 | NONE | (1) 8K x 8 or (1) 16K x 8 or (1) 32K x 8 |
256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 16K x 8 or (1) 32K x 8 |
256KB | (4) 64K x 8 | NONE | (1) 16K x 8 or (1) 32K x 8 |
512KB | (4) 128K x 8 | NONE | (1) 32K x 8 |
CACHE JUMPER CONFIGURATION | |||
Size | JS1 | JS2 | JS3 |
128KB | pins 2 & 3 closed | pins 2 & 3 closed | pins 2 & 3 closed |
256KB | pins 1 & 2 closed | pins 1 & 2 closed | pins 2 & 3 closed |
256KB | pins 2 & 3 closed | pins 1 & 2 closed | pins 2 & 3 closed |
512KB | pins 2 & 3 closed | pins 1 & 2 closed | pins 1 & 2 closed |
CPU TYPE CONFIGURATION | ||
Type | JC1 | JC2 |
CX486 M7 | 2A & 3A, 1B & 2B, 1C & 2C | 1 & 2, 3 & 4 |
80486SX | 1A & 2A, 1B & 2B, 1C & 2C | 2 & 3 |
SL 80486SX | 1A & 2A, 1B & 2B, 1C & 2C | 2 & 3 |
80487SX | 1A & 2A, 1B & 2B, 1C & 2C | 1 & 2, 3 & 4 |
AMD486DX/DXL | 1A & 2A, 1B & 2B, 1C & 2C | 1 & 2, 3 & 4 |
80486DX/DX2 | 1A & 2A, 1B & 2B, 1C & 2C | 1 & 2, 3 & 4 |
SL 80486DX/DX2 | 1A & 2A, 1B & 2B, 1C & 2C | 1 & 2, 3 & 4 |
Pentium Overdrive | 1A & 2A, 2B & 3B, 1C & 2C | 1 & 2, 3 & 4 |
Note: Pins designated should be in the closed position. |
CPU TYPE CONFIGURATION | ||
Type | JC3 | JC5 |
CX486 M7 | 2A & 3A, 4A & 5A, 3B & 4B, 5B & 6B, 3C & 4C, 5C & 6C | 1 & 2 |
80486SX | 4C & 5C | 1 & 2 |
SL 80486SX | 1A & 2A, 5A & 6A, 4C & 4D, 5C & 6C | 1 & 2 |
80487SX | 2B & 3B, 4C & 5C | 1 & 2 |
AMD486DX/DXL | 2A & 2B, 3B & 4B, 5A & 5B, 4C & 5C | 1 & 2 |
80486DX/DX2 | 3B & 4B, 4C & 5C | 1 & 2 |
SL 80486DX/DX2 | 1A & 2A, 3B & 4B, 4C & 4D, 5A & 6A, 5C & 6C | 1 & 2 |
Pentium Overdrive | 1A & 2A, 5A &6A, 2B & 3B, 5C & 6C | 2 & 3 |
Note: Pins designated should be in the closed position. |
CPU SPEED CONFIGURATION | |||
Speed | JK1 | JK2 | JK3 |
25MHz | 1 & 2, 7 & 9, 8 & 10, 14 & 16 | 2 & 3 | 1 & 2 |
33MHz | 1 & 2, 3 & 4, 5 & 6, 7 & 9, 8 & 10, 14 & 16 | 2 & 3 | 1 & 2 |
40MHz | 3 & 4, 10 & 12, 14 & 16 | 1 & 2 | 2 & 3 |
AMD40MHz | 3 & 4, 10 & 12, 14 & 16 | 4 & 5 | 2 & 3 |
50iMHz | 1 & 2, 7 & 9, 8 & 10, 14 & 16 | 2 & 3 | 1 & 2 |
50MHz | 1 & 2, 7 & 9, 10 & 12 | 1 & 2 | 2 & 3 |
66iMHz | 1 & 2, 3 & 4, 5 & 6, 7 & 9, 8 & 10, 14 & 16 | 2 & 3 | 1 & 2 |
Note: Pins designated should be in the closed position. |
BUS SPEED CONFIGURATION | |
CPU speed | JP2 |
<=33MHz | pins 1 & 2 closed |
>33MHz | pins 2 & 3 closed |
VESA WAIT STATE CONFIGURATION | |
Wait states | JP3 |
0 wait states | pins 1 & 2 open |
1 wait state | pins 1 & 2 closed |