UNIDENTIFIED
486EI VESA/EISA (VER. 1.0)
Processor | 80486SX/80487SX/80486DX/80486DX2/P23/P24T |
Processor Speed | 20/25/33/50(internal)/50/66(internal)MHz |
Chip Set | Unidentified |
Video Chip Set | None |
Maximum Onboard Memory | 256MB |
Maximum Video Memory | None |
Cache | 64/128/256/512KB |
BIOS | AMI/Phoenix |
Dimensions | 332mm x 221mm |
I/O Options | 32-bit VESA local bus slots (3) |
NPU Options | None |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Reset switch | J6 | Turbo switch | J22 |
Speaker | J8 | Turbo LED | J24 |
Power LED & keylock | J9 | 32-bit VESA local bus slots | SL1 - SL3 |
USER CONFIGURABLE SETTINGS | |||
Function | Label | Position | |
Monitor type select color | J7 | Closed | |
Monitor type select monochrome | J7 | Open |
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 | None | (1) 512K x 36 | None |
4MB | (1) 1M x 36 | None | None | None |
6MB | (1) 256K x 36 | (1) 256K x 36 | (1) 1M x 36 | None |
6MB | (1) 512K x 36 | None | (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 |
10MB | (1) 512K x 36 | None | (1) 1M x 36 | (1) 1M x 36 |
12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x 36 | None |
16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x 36 |
16MB | (1) 2M x 36 | None | (1) 2M x 36 | None |
16MB | (1) 4M x 36 | None | None | None |
18MB | (1) 256K x 36 | (1) 256K x 36 | (1) 4M x 36 | None |
18MB | (1) 512K x 36 | None | (1) 4M x 36 | None |
20MB | (1) 1M x 36 | (1) 4M x 36 | None | None |
24MB | (1) 1M x 36 | (1) 1M x 36 | (1) 4M x 36 | None |
32MB | (1) 4M x 36 | (1) 4M x 36 | None | None |
34MB | (1) 512K x 36 | None | (1) 4M x 36 | (1) 4M x 36 |
36MB | (1) 1M x 36 | (1) 4M x 36 | (1) 4M x 36 | None |
40MB | (1) 1M x 36 | (1) 1M x 36 | (1) 4M x 36 | (1) 4M x 36 |
48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x 36 | None |
64MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x 36 |
64MB | (1) 16M x 36 | None | None | None |
128MB | (1) 16M x 36 | (1) 16M x 36 | None | None |
192MB | (1) 16M x 36 | (1) 16M x 36 | (1) 16M x 36 | None |
256MB | (1) 16M x 36 | (1) 16M x 36 | (1) 16M x 36 | (1) 16M x 36 |
Note: The location of banks 0 & 1 are unidentified. |
CACHE CONFIGURATION | ||
Size | Bank 0 | Bank 1 |
64KB | (4) 8K x 8 | (4) 8K x 8 |
128KB | (4) 32K x 8 | None |
256KB | (4) 32K x 8 | (4) 32K x 8 |
512KB | (4) 128K x 8 | None |
Note: The location of banks 0 & 1 are unidentified. |
CACHE JUMPER CONFIGURATION | ||||||||
Size | JC1 | JC2 | JC3 | JC4 | JC5 | JC6 | JC7 | JC9 |
64KB | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 |
128KB | 2 & 3 | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & 2 |
256KB | 2 & 3 | 2 & 3 | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 | 2 & 3 | 4 & 5 |
512KB | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 1 & 2 |
Note: Pins designated should be in the closed position. |
CPU SPEED SELECTION | |||||
Speed | JL2 | JO1 | JO2 | JO3 | JO4 |
20MHz | Open | Open | Closed | Closed | Closed |
25MHz | Open | Closed | Open | Closed | Closed |
33MHz | Open | Closed | Closed | Open | Closed |
50iMHz | Open | Closed | Open | Closed | Closed |
50MHz | Closed | Open | Open | Open | Open |
66iMHz | Open | Closed | Closed | Open | Closed |
CPU TYPE SELECTION | |||
Type | J1 | J2 | J3 |
80486SX | Open | Open | Pins 2 & 3 closed |
80487SX | Closed | Pins 2 & 3 closed | Pins 1 & 2 closed |
80486DX | Closed | Pins 1 & 2 closed | Pins 2 & 3 closed |
80486DX2 | Closed | Pins 1 & 2 closed | Pins 2 & 3 closed |
P23T | Closed | Pins 2 & 3 closed | Pins 1 & 2 closed |
P24T | Closed | Pins 2 & 3 closed | Pins 1 & 2 closed |