R486 SX25MBC, R486 DX33MBC, R486 DX50MBC, R486 DX2-50MBC, R486 DX2-66MBC Motherboard Settings and Configuration
RELIALOGIC CORPORATION PRIVATE, LTD.
R486 SX25MBC, R486 DX33MBC, R486 DX50MBC, R486 DX2-50MBC, R486 DX2-66MBC
Processor | 80486SX/80487SX/80486DX/80486DX2 |
Processor Speed | 25/33/50(internal)/66(internal)MHz |
Chip Set | UMC |
Max. Onboard DRAM | 32MB |
Cache | 64/128/256KB |
BIOS | AMI |
Dimensions | 330mm x 218mm |
I/O Options | None |
NPU Options | 4167 |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Power LED & keylock | J1 | Reset switch | J4 |
Speaker | J2 | Turbo LED | J5 |
Turbo switch | J3 | External battery | J6 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | Battery type select - internal | W22 | Closed |
| Battery type select - external | W22 | Open |
» | Monitor type select monochrome/EGA/VGA | W18 | Open |
| Monitor type select CGA | W18 | Closed |
DRAM CONFIGURATION | ||||
Size | A | B | C | D |
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 | (1) 256K x 36 | NONE |
4MB | (4) 256K x 9 | (4) 256K x 9 | (1) 256K x 36 | (1) 256K x 36 |
4MB | (4) 1M x 9 | NONE | NONE | NONE |
5MB | (4) 256K x 9 | (4) 1M x 9 | NONE | NONE |
6MB | (4) 256K x 9 | (4) 256K x 9 | (1) 1M x 36 | NONE |
8MB | (4) 1M x 9 | (4) 1M x 9 | NONE | NONE |
9MB | (4) 256K x 9 | (4) 1M x 9 | (1) 1M x 36 | NONE |
10MB | (4) 256K x 9 | (4) 256K x 9 | (1) 1M x 36 | (1) 1M x 36 |
12MB | (4) 1M x 9 | (4) 1M x 9 | (1) 1M x 36 | NONE |
16MB | (4) 1M x 9 | (4) 1M x 9 | (1) 1M x 36 | (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) 4M x 9 | (1) 1M x 36 | NONE |
32MB | (4) 4M x 9 | (4) 4M x 9 | NONE | NONE |
40MB | (4) 4M x 9 | (4) 4M x 9 | (1) 1M x 36 | (1) 1M x 36 |
DRAM JUMPER CONFIGURATION | ||||
Bank | W12 | W13 | W15 | W16 |
Bank 0 = A, Bank 1 = B, Bank 2 = C, Bank 3 = D | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
Bank 0 = C, Bank 1 = D, Bank 2 = A, Bank 3 = B | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 |
Note:Pins designated should be in the closed position. | ||||
CACHE CONFIGURATION | ||||
Size | Bank 0 | Bank 1 | TAG | U10 (Dirty Bit) |
64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 | (1) 16K x 4 |
128KB | (4) 32K x 8 | NONE | (1) 8K x 8 | (1) 16K x 4 |
256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 | (1) 16K x 4 |
CACHE JUMPER CONFIGURATION | ||||||||
Size | W2 | W3 | W4 | W5 | W6 | W7 | W8 | W9 |
64KB | 1 & 2 | 1 & 2 | Open | 1 & 2 | Open | Open | Open | Open |
128KB | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 | Closed | Open | Open | Closed |
256KB | 2 & 3 | 2 & 3 | 2 & 3 | 1 & 2 | Closed | Closed | Closed | Closed |
Note:Pins designated should be in the closed position. | ||||||||
CPU TYPE CONFIGURATION | ||
Type | W10 | W11 |
80486SX | Open | pins 2 & 3 closed |
80487SX | pins 2 & 3 closed | pins 1 & 2, 3 & 4 closed |
80486DX | pins 1 & 2 closed | pins 1 & 2, 3 & 4 closed |
80486DX2 | pins 1 & 2 closed | pins 1 & 2, 3 & 4 closed |
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