FOREX 486/50 Motherboard Settings and Configuration
MICRO EXPRESS, INC.
FOREX 486/50
Processor | 80486SX/80487SX/80486DX/80486DX2 |
Processor Speed | 25/33/50(internal)/50/66(internal)MHz |
Chip Set | FOREX |
Max. Onboard DRAM | 32MB |
Cache | 64/128/256KB |
BIOS | AMI |
Dimensions | 254mm x 218mm |
I/O Options | 32-bit local bus card slot |
NPU Options | 4167 |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
External battery | J2 | Turbo switch | J15 |
Reset switch | J8 | Turbo LED | J16 |
Power LED & keylock | J9 | 32-bit local bus card | S1 |
Speaker | J10 |
|
|
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | CMOS memory normal operation | JP6 | Open |
| CMOS memory clear | JP6 | Closed |
» | Local bus speed select < 33MHz | JP20 | Open |
| Local bus speed select ³ 33MHz | JP20 | 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 (U1) | TAG (U2) |
64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 | NONE |
128KB | (4) 32K x 8 | NONE | (1) 8K x 8 | NONE |
256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 8K x 8 | (1) 8K x 8 |
SRAM JUMPER CONFIGURATION | |||||
Size | JP8A | JP8B | JP8D | JP8E | JP8F |
64KB | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
128KB | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 |
256KB | 2 & 3 | 1 & 2 | 2 & 3 | 1 & 2 | 1 & 2 |
Note: Pins designated should be in the closed position. | |||||
CPU TYPE CONFIGURATION | |||
Type | JP12 | JP13 | JP30 |
80486SX | pins 2 & 3 closed | pins 2 & 3 closed | pins 2 & 3 closed |
80487SX | pins 1 & 2 closed | pins 1 & 2 closed | pins 2 & 3 closed |
80486DX | pins 1 & 2 closed | pins 1 & 2 closed | pins 1 & 2 closed |
80486DX2 | pins 1 & 2 closed | pins 1 & 2 closed | pins 1 & 2 closed |
My Books
