JPN CORPORATION
MB-486 DX-33 UM
Processor | 80486SX/80487SX/80486DX |
Processor Speed | 33MHz |
Chip Set | UMC |
Max. Onboard DRAM | 40MB |
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 | |
» | Monitor type select CGA | W18 | Closed |
Monitor type select monochrome/EGA/VGA | W18 | Open | |
» | Battery select internal | W22 | Closed |
Battery select external | W22 | Open |
DRAM CONFIGURATION | ||||
Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
1MB 1 | (4) 256K x 9 | NONE | NONE | NONE |
1MB 2 | NONE | NONE | (1) 256K x 36 | NONE |
2MB 1 | (4) 256K x 9 | (4) 256K x 9 | NONE | NONE |
2MB 2 | NONE | NONE | (1) 256K x 36 | (1) 256K x 36 |
3MB 1 | (4) 256K x 9 | (4) 256K x 9 | (1) 256K x 36 | NONE |
3MB 2 | (4) 256K x 9 | NONE | (1) 256K x 36 | (1) 256K x 36 |
4MB 1 | (4) 256K x 9 | (4) 256K x 9 | (1) 256K x 36 | (1) 256K x 36 |
4MB 2 | (4) 256K x 9 | (4) 256K x 9 | (1) 256K x 36 | (1) 256K x 36 |
4MB 1 | (4) 1M x 9 | NONE | NONE | NONE |
4MB 2 | NONE | NONE | (1) 1M x 36 | NONE |
5MB 1 | (4) 256K x 9 | (4) 1M x 9 | NONE | NONE |
5MB 2 | NONE | NONE | (1) 256K x 36 | (1) 1M x 36 |
6MB 1 | (4) 256K x 9 | (4) 256K x 9 | (1) 1M x 36 | NONE |
6MB 2 | (4) 1M x 9 | NONE | (1) 256K x 36 | (1) 256K x 36 |
8MB 1 | (4) 1M x 9 | (4) 1M x 9 | NONE | NONE |
8MB 2 | NONE | NONE | (1) 1M x 36 | (1) 1M x 36 |
9MB 1 | (4) 256K x 9 | (4) 1M x 9 | (1) 1M x 36 | NONE |
9MB 2 | (4) 1M x 9 | NONE | (1) 256K x 36 | (1) 1M x 36 |
10MB 1 | (4) 256K x 9 | (4) 256K x 9 | (1) 1M x 36 | (1) 1M x 36 |
10MB 2 | (4) 1M x 9 | (4) 1M x 9 | (1) 256K x 36 | (1) 256K x 36 |
12MB 1 | (4) 1M x 9 | (4) 1M x 9 | (1) 1M x 36 | NONE |
12MB 2 | (4) 1M x 9 | NONE | (1) 1M x 36 | (1) 1M x 36 |
16MB 1 | (4) 1M x 9 | (4) 1M x 9 | (1) 1M x 36 | (1) 1M x 36 |
16MB 2 | (4) 1M x 9 | (4) 1M x 9 | (1) 1M x 36 | (1) 1M x 36 |
16MB 1 | (4) 4M x 9 | NONE | NONE | NONE |
16MB 2 | NONE | NONE | (1) 4M x 36 | NONE |
20MB 1 | (4) 1M x 9 | (4) 4M x 9 | NONE | NONE |
20MB 2 | NONE | NONE | (1) 1M x 36 | (1) 4M x 36 |
24MB 1 | (4) 1M x 9 | (4) 1M x 9 | (1) 4M x 36 | NONE |
24MB 2 | (4) 4M x 9 | NONE | (1) 1M x 36 | (1) 1M x 36 |
32MB 1 | (4) 4M x 9 | (4) 4M x 9 | NONE | NONE |
32MB 2 | NONE | NONE | (1) 4M x 36 | (1) 4M x 36 |
40MB 1 | (4) 1M x 9 | (4) 1M x 9 | (1) 4M x 36 | (1) 4M x 36 |
40MB 2 | (4) 4M x 9 | (4) 4M x 9 | (1) 1M x 36 | (1) 1M x 36 |
Note 1 :On jumpers W12, W13, W15, and W16 - pins 1 & 2 should be in the closed position.Note 2 :On jumpers W12, W13, W15, and W16 - pins 2 & 3 should be in the closed position. |
CACHE CONFIGURATION | ||||
Size | Bank 0 | Bank 1 | Dirty Bit (U10) | TAG (U11) |
64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 16K x 8 | (1) 8K x 8 |
128KB | (4) 32K x 8 | NONE | (1) 16K x 8 | (1) 8K x 8 |
256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 16K x 8 | (1) 32K x 8 |
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 | Open |
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 and 3 & 4 closed |
80486DX | pins 1 & 2 closed | pins 1 & 2 and 3 & 4 closed |