486LC Motherboard Settings and Configuration
ADVANCED INTEGRATION RESEARCH, INC.
486LC
Processor | 80486DX |
Processor Speed | 25/33MHz |
Chip Set | UMC |
Max. Onboard DRAM | 16MB |
Cache | 128/256KB |
BIOS | AMI/Award/Phoenix |
Dimensions | 355mm x 304mm |
I/O Options | None |
NPU Options | 4167 |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Power LED & keylock | J1 | Turbo LED | J6 |
Speaker | J4 | External 6V battery | JB2 |
Reset switch | J5 | ||
Note:No internal battery is provided, an external battery must be used. | |||
USER CONFIGURABLE SETTINGS | |||
Function | Jumper/Switch | Position | |
| » | CPU speed select high | J3 | pins 1 & 2 closed |
CPU speed select low | J3 | pins 2 & 3 closed | |
| » | Factory configured - do not alter | SW1/1 | N/A |
| » | UNIX operating system not installed | SW1/2 | Off |
UNIX operating system installed | SW1/2 | On | |
| » | External cache memory disabled | SW1/3 | Off |
External cache memory enabled | SW1/3 | On | |
| » | Memory range 00C00000-00FFFFFF (12-16MB) cacheable | SW1/4 | Off |
Memory range 00C00000-00FFFFFF (12-16MB) non-cacheable | SW1/4 | On | |
| » | Monitor type select color | SW1/5 | On |
Monitor type select monochrome | SW1/5 | Off | |
| » | Onboard DRAM enabled | SW1/6 | On |
Onboard DRAM disabled | SW1/6 | Off | |
DRAM CONFIGURATION | ||||
Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
1MB | (4) 256K x 9 | NONE | NONE | NONE |
2MB | (4) 256K x 9 | (4) 256K x 9 | NONE | NONE |
3MB | (4) 256K x 9 | (4) 256K x 9 | (4) 256K x 9 | NONE |
4MB | (4) 256K x 9 | (4) 256K x 9 | (4) 256K x 9 | (4) 256K x 9 |
4MB | (4) 1M x 9 | NONE | NONE | NONE |
8MB | (4) 1M x 9 | (4) 1M x 9 | NONE | NONE |
12MB | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 | NONE |
16MB | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 |
DRAM JUMPER CONFIGURATION | |||
Size | JP1 | JP2 | JP3 |
1MB | pins 1 & 2 closed | pins 1 & 2 closed | pins 1 & 2 closed |
2MB | pins 2 & 3 closed | pins 1 & 2 closed | pins 1 & 2 closed |
3MB | pins 1 & 2 closed | pins 2 & 3 closed | pins 1 & 2 closed |
4MB | pins 2 & 3 closed | pins 2 & 3 closed | pins 1 & 2 closed |
4MB | pins 1 & 2 closed | pins 1 & 2 closed | pins 2 & 3 closed |
8MB | pins 2 & 3 closed | pins 1 & 2 closed | pins 2 & 3 closed |
12MB | pins 1 & 2 closed | pins 2 & 3 closed | pins 2 & 3 closed |
16MB | pins 2 & 3 closed | pins 2 & 3 closed | pins 2 & 3 closed |
CACHE CONFIGURATION | ||
Size | Bank 0 | Bank 1 |
128KB | (4) 32K x 8 | NONE |
256KB | (4) 32K x 8 | (4) 32K x 8 |
Note:Model 486LC may be equipped with 4 DIP sockets for a maximum of 128KB cache. | ||
MEMORY CHIP SPEED JUMPER CONFIGURATION | ||
25MHz | 33MHz | JP4 |
80ns | 60ns | pins 1 & 2 closed |
100ns | 80ns | pins 2 & 3 closed |
BIOS CONFIGURATION | ||
Size | JB1 | SW1/7 |
27256 | pins 1 & 2 closed | Off |
27512 | pins 2 & 3 closed | On |
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