UM 486V Motherboard Settings and Configuration
ELITEGROUP COMPUTER SYSTEMS, INC.
UM 486V
Processor | 80486SX/80487SX/80486DX/80486DX2/Pentium Overdrive |
Processor Speed | 25/33/50(internal)/50/66(internal)MHz |
Chip Set | UMC |
Max. Onboard DRAM | 32MB |
Cache | 64/128/256KB |
BIOS | AMI |
Dimensions | 330mm x 218mm |
I/O Options | 32-bit VESA local bus slots (2) |
NPU Options | None |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
External battery | J1 | Reset switch | J12 |
Power LED & keylock | J4 | Speaker | J13 |
Turbo LED | J10 | 32-bit VESA Local bus slot | S1 |
Turbo switch | J11 | 32-bit VESA Local bus slot | S2 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | Monitor type select color | JP13 | pins 2 & 3 closed |
| Monitor type select monochrome | JP13 | pins 1 & 2 closed |
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) 256K x 9 | (4) 1M x 9 |
8MB | (4) 1M x 9 | (4) 1M x 9 |
16MB | (4) 4M x 9 | NONE |
20MB | (4) 1M x 9 | (4) 4M x 9 |
32MB | (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 | (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 JUMPER CONFIGURATION | ||||
Size | JP22 | JP23 | JP27 | JP28 |
64KB | pins 1 & 2 closed | Open | Open | pins 1 & 2 closed |
128KB | pins 2 & 3 closed | Open | Closed | pins 2 & 3 closed |
256KB | pins 1 & 2 closed | Closed | Closed | pins 2 & 3 closed |
CPU TYPE CONFIGURATION | |||
Type | JP24 | JP25 | JP26 |
80486SX | Closed | pins 2 & 3 closed | Open |
80486SX (PQFP) | Open | N/A | N/A |
80487SX | Closed | pins 1 & 2 and 3 & 4 closed | pins 2 & 3 closed |
80486DX | Closed | pins 1 & 2 and 3 & 4 closed | pins 1 & 2 closed |
80486DX2 | Closed | pins 1 & 2 and 3 & 4 closed | pins 1 & 2 closed |
Pentium Overdrive | Closed | pins 1 & 2 and 3 & 4 closed | pins 2 & 3 closed |
CPU SPEED CONFIGURATION | ||||
Speed | JP18 | JP19 | JP20 | JP21 |
25MHz | Closed | Closed | Open | Open |
33MHz | Open | Closed | Open | Open |
50i MHz | Closed | Closed | Open | Open |
50MHz | Open | Open | Open | Open |
66i MHz | Open | Closed | Open | Open |
VESA WAIT STATE/BUS SPEED (ID2 & ID3) CONFIGURATION | |||
CPU speed | Wait states | JP15 (ID3) | JP16 (ID2) |
£ 33MHz | 0 wait states | Open | Open |
> 33MHz | 1 wait state | Closed | Closed |
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