G486U/G486USX Motherboard Settings and Configuration
JOINDATA SYSTEMS, INC.
G486U/G486USX
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Processor | 80486SX/80487SX/80486DX |
Processor Speed | 20/25/33/50MHz |
Chip Set | UMC |
Max. Onboard DRAM | 64MB |
Cache | 64/128/256KB |
BIOS | AMI/MR |
Dimensions | 215mm x 330mm |
I/O Options | None |
NPU Options | 4167 |
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CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Reset switch | J9 | Speaker | J12 |
Turbo switch | J11 | Power LED & keylock | J13 |
Turbo LED | J10 | External battery | J14 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | Monitor type select color | JP15 | Closed |
| Monitor type select monochrome | JP15 | Open |
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 |
5MB | (4) 256K x 9 | (4) 1 M x 9 | NONE | NONE |
6MB | (4) 256K x 9 | (4) 256K x 9 | (4) 1 M x 9 | NONE |
8MB | (4) 1M x 9 | (4) 1M x 9 | NONE | NONE |
9MB | (4) 256K x 9 | (4) 1M x 9 | (4) 1M x 9 | NONE |
10MB | (4) 256K x 9 | (4) 256K x 9 | (4) 1M x 9 | (4) 1M x 9 |
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 |
16MB | (4) 4M x 9 | NONE | NONE | NONE |
20MB | (4) 1M x 9 | (4) 4M x 9 | NONE | NONE |
24MB | (4) 1M x 9 | (4) 1M x 9 | (4) 4M x 9 | NONE |
32MB | (4) 4M x 9 | (4) 4M x 9 | NONE | NONE |
36MB | (4) 1M x 9 | (4) 4M x 9 | (4) 4M x 9 | NONE |
40MB | (4) 1M x 9 | (4) 1M x 9 | (4) 4M x 9 | (4) 4M x 9 |
48MB | (4) 4M x 9 | (4) 4M x 9 | (4) 4M x 9 | NONE |
64MB | (4) 4M x 9 | (4) 4M x 9 | (4) 4M x 9 | (4) 4M x 9 |
CACHE CONFIGURATION | |||
Size | Bank 0 | Bank 1 | Tag |
64KB | (4) 8K x 8 | (4) 8K x 8 | (3) 16K x 4 |
128KB | (4) 32K x 8 | NONE | (3) 16K x 4 |
256KB | (4) 32K x 8 | (4) 32K x 8 | (3) 16K x 4 |
CACHE JUMPER CONFIGURATION | |||||
Size | W14 | W15 | W16 | W17 | W18 |
64KB | 1 & 2 | Open | 1 & 2 | 1 & 2 | 2 & 3 |
128KB | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 | 2 & 3 |
256KB | 1 & 2 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
Note: Pins designated should be in the closed position. | |||||
CPU TYPE CONFIGURATION | |||||
Type | W5 | W10 | W11 | W12 | W13 |
80486SX | Closed | Open | Open | Open | pins 1 & 2 closed |
80487SX | Open | Closed | pins 2 & 3 closed | Closed | pins 2 & 3 closed |
80486DX | Open | Closed | pins 1 & 2 closed | Closed | pins 2 & 3 closed |
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