UNIDENTIFIED
486UL (VER. 2)
Processor | 80486SX/80487SX/ODP486/80486DX/80486DX2 |
Processor Speed | 25/33/40/50(internal)/50/66(internal)MHz |
Chip Set | UMC |
Video Chip Set | None |
Maximum Onboard Memory | 64MB |
Maximum Video Memory | None |
Cache | 64/128/256KB |
BIOS | AMI/Award |
Dimensions | 250mm x 220mm |
I/O Options | 32-bit VESA local bus slots (3) |
NPU Options | None |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
External battery | J1 | Power LED & keylock | J5 |
Turbo LED | J2 | Reset switch | J6 |
Turbo switch | J3 | 32-bit VESA local bus slots | SL1 - SL3 |
Speaker | J4 |
USER CONFIGURABLE SETTINGS | |||
Function | Label | Position | |
Turbo switch enabled/controlled by kbd CTRL, ALT - (low), CTRL, ALT + (high) | J3 | Open | |
Turbo switch disabled | J3 | Closed | |
» | Any VESA card installed | JP9 | 1 & 2 |
Weitek Power 9000 VESA card installed | JP9 | 2 & 3 |
DRAM CONFIGURATION | ||
Size | Bank 0 | Bank 1 |
1MB | (4) 256K x 9 | None |
2MB | (4) 256K x 9 | (4) 256K x 9 |
4MB | (4) 1M x 9 | None |
5MB | (4) 1M x 9 | (4) 256K x 9 |
8MB | (4) 1M x 9 | (4) 1M x 9 |
16MB | (4) 4M x 9 | None |
17MB | (4) 4M x 9 | (4) 256K x 9 |
20MB | (4) 1M x 9 | (4) 4M x 9 |
32MB | (4) 4M x 9 | (4) 4M x 9 |
64MB | (4) 16M x 9 | None |
CACHE CONFIGURATION | |||
Size | Bank 0 | Bank 1 | TAG |
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) 32K x 8 |
CACHE RESISTOR CONFIGURATION | |||
Size | RN6 | RN7 | RN8 |
64KB | Installed | Not installed | Not installed |
128KB | Not installed | Installed | Not installed |
256KB | Not installed | Not installed | Installed |
CPU SPEED SELECTION | ||||
Speed | J22 | JP3 | JP4 | JP5 |
25MHz | Pins 1 & 2 closed | Closed | Open | Open |
33MHz | Pins 1 & 2 closed | Closed | Closed | Closed |
40MHz | Pins 1 & 2 closed | Closed | Closed | Open |
50iMHz | Pins 1 & 2 closed | Closed | Open | Open |
50MHz | Pins 2 & 3 closed | Open | Open | Closed |
66iMHz | Pins 1 & 2 closed | Closed | Closed | Closed |
CPU TYPE SELECTION | ||
Type | JP1 | JP2 |
80486SX | Pins 2 & 3 closed | Open |
80487SX | Pins 1 & 2, 3 & 4 closed | Pins 2 & 3 closed |
ODP486 | Pins 1 & 2, 3 & 4 closed | Pins 2 & 3 closed |
80486DX | Pins 1 & 2, 3 & 4 closed | Pins 1 & 2 closed |
80486DX2 | Pins 1 & 2, 3 & 4 closed | Pins 1 & 2 closed |
VL BUS WAIT STATE SELECTION | ||
Setting | JP13 | |
0 | Open | |
» | 1 | Closed |
VL-BUS SPEED SELECTION | |
CPU speed | JP12 |
<= 33MHz | Open |
>33 MHz | Closed |