4MHL3S Motherboard Settings and Configuration
EFA CORPORATION
4MHL3S
Processor | CX486SX/80486SX/CX486DX/80486DX/80486DX2 |
Processor Speed | 20/25/33/40/50(internal)/50/66(internal)MHz |
Chip Set | UMC |
Max. Onboard DRAM | 64MB |
Cache | 32/64/128/256KB |
BIOS | AMI |
Dimensions | 330mm x 218mm |
I/O Options | 32-bit VESA local bus slots (3) |
NPU Options | None |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
External battery | JP21 | Reset switch | JP26 |
Power LED & keylock | JP22 | Green PC connector | JP28 |
Speaker | JP23 | 32-bit VESA Local bus slot | S1 |
Turbo LED | JP24 | 32-bit VESA Local bus slot | S2 |
Turbo switch | JP25 | 32-bit VESA Local bus slot | S3 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
| External battery enabled | JP1 | Open |
| Internal battery enabled | JP1 | Closed |
| CPU CX486SX & CX487SX enabled | JP6 | pins 1 & 2 closed |
| CPU CX486SX & CX487SX disabled | JP6 | Open |
» | Trident 9000 video card not installed | JP8 | pins 1 & 2 closed |
| Trident 9000 video card installed | JP8 | pins 2 & 3 closed |
» | External green card enabled | JP10 | pins 2 & 3 closed |
| External green card disabled | JP10 | pins 1 & 2 closed |
» | Factory configured - do not alter | JP13 | pins 1 & 2 closed |
| 32K x 8 TAG enabled | JP27 | pins 1 & 2 closed |
| 16K x 8 TAG enabled | JP27 | pins 2 & 3 closed |
» | Factory configured - do not alter | JP29 | pins 2 & 3 closed |
» | Factory configured - do not alter | JP30 | pins 2 & 3 closed |
» | Factory configured - do not alter | JP31 | Closed |
DRAM CONFIGURATION | |||
Size | Bank 0 | Bank 1 | Bank 2 |
1MB | (4) 256K x 9 | NONE | NONE |
2MB | (4) 256K x 9 | (1) 256K x 36 | NONE |
2MB | (4) 256K x 9 | NONE | (1) 256K x 36 |
2MB | NONE | (1) 256K x 36 | (1) 256K x 36 |
2MB | NONE | (1) 512K x 36 | NONE |
2MB | NONE | NONE | (1) 512K x 36 |
3MB | (4) 256K x 9 | (1) 256K x 36 | (1) 256K x 36 |
3MB | (4) 256K x 9 | (1) 512K x 36 | NONE |
3MB | NONE | (1) 512K x 36 | (1) 256K x 36 |
3MB | NONE | (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 | (4) 256K x 9 | (1) 512K x 36 | (1) 256K x 36 |
5MB | (4) 1M x 9 | (1) 256K x 36 | NONE |
5MB | (4) 1M x 9 | NONE | (1) 256K x 36 |
5MB | NONE | (1) 1M x 36 | (1) 256K x 36 |
5MB | NONE | (1) 256K x 36 | (1) 1M x 36 |
5MB | (4) 256K x 9 | (1) 1M x 36 | NONE |
5MB | (4) 256K x 9 | NONE | (1) 1M x 36 |
6MB | (4) 1M x 9 | (1) 256K x 36 | (1) 256K x 36 |
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 | NONE | (1) 1M x 36 | (1) 512K x 36 |
6MB | NONE | (1) 512K x 36 | (1) 1M x 36 |
7MB | (4) 1M x 9 | (1) 512K x 36 | (1) 256K x 36 |
8MB | (4) 1M x 9 | (1) 1M x 36 | NONE |
8MB | (4) 1M x 9 | NONE | (1) 1M x 36 |
8MB | NONE | (1) 1M x 36 | (1) 1M x 36 |
DRAM CONFIGURATION (CONT.) | |||
Size | Bank 0 | Bank 1 | Bank 2 |
9MB | (4) 1M x 9 | (1) 1M x 36 | (1) 256K x 36 |
9MB | (4) 1M x 9 | (1) 256K x 36 | (1) 1M x 36 |
9MB | (4) 256K x 9 | (1) 1M x 36 | (1) 1M x 36 |
10MB | NONE | (1) 2M x 36 | (1) 512K x 36 |
10MB | (4) 1M x 9 | (1) 512K x 36 | (1) 1M x 36 |
12MB | (4) 1M x 9 | (1) 1M x 36 | (1) 1M x 36 |
12MB | (4) 1M x 9 | (1) 2M x 36 | NONE |
12MB | NONE | (1) 2M x 36 | (1) 1M x 36 |
12MB | NONE | (1) 1M x 36 | (1) 2M x 36 |
13MB | (4) 256K x 9 | (1) 2M x 36 | (1) 1M x 36 |
13MB | (4) 1M x 9 | (1) 2M x 36 | (1) 256K x 36 |
16MB | (4) 4M x 9 | NONE | NONE |
16MB | (4) 1M x 9 | (1) 2M x 36 | (1) 1M x 36 |
16MB | NONE | (1) 2M x 36 | (1) 2M x 36 |
17MB | (4) 4M x 9 | (1) 256K x 36 | NONE |
17MB | (4) 4M x 9 | NONE | (1) 256K x 36 |
17MB | (4) 256K x 9 | (1) 4M x 36 | NONE |
17MB | (4) 256K x 9 | NONE | (1) 4M x 36 |
18MB | (4) 4M x 9 | (1) 256K x 36 | (1) 256K x 36 |
18MB | (4) 256K x 9 | (1) 4M x 36 | (1) 256K x 36 |
18MB | (4) 256K x 9 | (1) 256K x 36 | (1) 4M x 36 |
19MB | (4) 4M x 9 | (1) 512K x 36 | (1) 256K x 36 |
20MB | (4) 4M x 9 | (1) 1M x 36 | NONE |
20MB | (4) 4M x 9 | NONE | (1) 1M x 36 |
20MB | (4) 1M x 9 | (1) 4M x 36 | NONE |
20MB | (4) 1M x 9 | NONE | (1) 4M x 36 |
21MB | (4) 256K x 9 | (1) 4M x 36 | (1) 1M x 36 |
21MB | (4) 256K x 9 | (1) 1M x 36 | (1) 4M x 36 |
21MB | (4) 1M x 9 | (1) 4M x 36 | (1) 256K x 36 |
21MB | (4) 1M x 9 | (1) 256K x 36 | (1) 4M x 36 |
21MB | (4) 4M x 9 | (1) 1M x 36 | (1) 256K x 36 |
21MB | (4) 4M x 9 | (1) 256K x 36 | (1) 1M x 36 |
22MB | (4) 4M x 9 | (1) 512K x 36 | (1) 1M 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) 4M x 36 | (1) 2M x 36 |
24MB | NONE | (1) 2M x 36 | (1) 4M x 36 |
25MB | (4) 256K x 9 | (1) 2M x 36 | (1) 4M x 36 |
25MB | (4) 4M x 9 | (1) 2M x 36 | (1) 256K x 36 |
28MB | (4) 4M x 9 | (1) 2M x 36 | (1) 1M x 36 |
28MB | (4) 1M x 9 | (1) 2M x 36 | (1) 4M x 36 |
32MB | (4) 4M x 9 | (1) 4M x 36 | NONE |
32MB | (4) 4M x 9 | NONE | (1) 4M x 36 |
32MB | NONE | (1) 4M x 36 | (1) 4M x 36 |
DRAM CONFIGURATION (CONT.) | |||
Size | Bank 0 | Bank 1 | Bank 2 |
33MB | (4) 256K x 9 | (1) 4M x 36 | (1) 4M x 36 |
33MB | (4) 4M x 9 | (1) 256K x 36 | (1) 4M x 36 |
33MB | (4) 4M x 9 | (1) 4M x 36 | (1) 256K x 36 |
34MB | (4) 4M x 9 | (1) 512K x 36 | (1) 4M 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 |
40MB | (4) 4M x 9 | (1) 2M x 36 | (1) 4M x 36 |
48MB | (4) 4M x 9 | (1) 4M x 36 | (1) 4M x 36 |
64MB | (4) 16M x 9 | NONE | NONE |
CLOCK GENERATOR CONFIGURATION | ||
Clock Type | JP32 | JP33 |
MX8310 | pins 1 & 2 closed | Open |
MX8315 | Open | Closed |
CACHE CONFIGURATION | |||
Size | Bank 0 | Bank 1 | TAG |
32KB | (4) 8K x 8 | NONE | (1) 8K x 8 |
64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 |
128KB | (4) 32K x 8 | NONE | (1) 8K x 8 |
256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 16K x 8 |
256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 |
CACHE JUMPER CONFIGURATION | |||||
Size | JP15 | JP16 | JP17 | JP19 | JP20 |
32KB | pins 2 & 3 | Open | Open | Open | Open |
64KB | pins 1 & 2 | Open | Open | Closed | Open |
128KB | pins 2 & 3 | pins 2 & 3 | Closed | Closed | Open |
256KB | pins 1 & 2 | pins 1 & 2 | Closed | Closed | Closed |
Note:Pins designated should be in the closed position. | |||||
CPU TYPE CONFIGURATION | ||
Type | JP9 | JP11 |
80486SX | Open | pins 2 & 3 closed |
ODP486SX | pins 2 & 3 closed | pins 1 & 2, and 3 & 4 closed |
CX486SX/CX487SX | pins 1 & 2 closed | pins 1 & 2, and 3 & 4 closed |
80486DX2 | pins 1 & 2 closed | pins 1 & 2, and 3 & 4 closed |
80486DX2 Overdrive | pins 2 & 3 closed | pins 1 & 2, and 3 & 4 closed |
CPU SPEED CONFIGURATION | ||||
Speed | JP2 | JP3 | JP4 | JP7 |
20MHz | Open | Open | Open | pins 1 & 2 closed |
25MHz | Closed | Open | Open | pins 1 & 2 closed |
33MHz | Closed | Closed | Closed | pins 1 & 2 closed |
40MHz | Closed | Closed | Open | pins 2 & 3 closed |
50i MHz | Closed | Open | Open | pins 1 & 2 closed |
50MHz | Open | Open | Closed | pins 2 & 3 closed |
66i MHz | Closed | Closed | Closed | pins 1 & 2 closed |
NPU TYPE CONFIGURATION | ||
Type | JP12 | JP14 |
Intel CPU or CX486SX | pins 2 & 3 closed | Open |
CX486SX & CX487SX | pins 1 & 2 closed | pins 2 & 3 closed |
VESA WAIT STATE/BUS SPEED CONFIGURATION | ||
CPU speed | Wait states | JP18 |
£ 33MHz | 0 wait states | Open |
> 33MHz | 1 wait state | Closed |
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