FUJIKAMA USA, INC.
80486DX-33/50MHz CONTAQ MAIN BOARD
|
Processor |
80486SX/80487SX/80486DX |
|
Processor Speed |
16/20/25/33/50MHz |
|
Chip Set |
CONTAQ |
|
Max. Onboard DRAM |
32MB |
|
Cache |
64/256KB |
|
BIOS |
AMI |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
Auxiliary keyboard connector |
|
NPU Options |
4167 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Keylock |
J3 pins 1 & 2 |
Turbo switch |
J3 pins 15 - 17 |
|
Power LED |
J3 pins 3 - 5 |
Reset switch |
J3 pins 19 & 20 |
|
Speaker |
J3 pins 7 - 10 |
Auxiliary keyboard |
J4 |
|
Turbo LED |
J3 pins 12 & 13 |
External battery |
JP2 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
Monitor type select color |
JP1 |
Closed | |
|
Monitor type select monochrome |
JP1 |
Open | |
|
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) 4M x 9 |
(4) 1M x 9 |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
|
CACHE CONFIGURATION | ||
|
Size |
Bank 0 |
TAG |
|
64KB |
(8) 8K x 8 |
(1) 8K x 8 |
|
256KB |
(8) 32K x 8 |
(1) 32K x 8 |
|
CACHE JUMPER CONFIGURATION | |
|
Size |
JP8 |
|
64KB |
pins 1A & 2A, 3A & 4A, 1C & 2C, 3C & 4C closed. |
|
256KB |
pins 1B & 2B, 3B & 4B, 1D & 2D, 3D & 4D closed. |
|
CPU TYPE CONFIGURATION | |
|
Type |
JP7 |
|
80486SX |
pins 1B & 2B, 3B & 4B, 1D & 2D, 3D & 4D closed. |
|
80487SX |
pins 4A & 4B, 4C & 4D, 2A & 2B, 2C & 2D closed. |
|
80486DX |
pins 4A & 4B, 4C & 4D, 1A & 1B, 1C & 1D closed. |
|
CPU SPEED CONFIGURATION | |||||
|
Speed |
Crystal OSC1 |
JP3 |
JP5 |
JP6 |
JP9 |
|
16MHz |
32MHz |
2 & 3 |
Open |
Open |
1 & 2 |
|
20MHz |
40MHz |
1 & 2 |
Open |
Open |
1 & 2 |
|
25MHz |
25MHz |
1 & 2 |
Closed |
Open |
2 & 3 |
|
33MHz |
33MHz |
1 & 2 |
Open |
Closed |
2 & 3 |
|
50MHz |
50MHz |
1 & 2 |
Closed |
Closed |
2 & 3 |
|
Note: Pins designated should be in the closed position. | |||||