FOREX 386/486 Motherboard Settings and Configuration
MICRO EXPRESS, INC.
FOREX 386/486
Processor | 80386DX/CX486DLC/80486SX/80487SX/80486DX/80486DX2 |
Processor Speed | 20/25/33/40/50(internal)/66(internal)MHz |
Chip Set | Forex |
Max. Onboard DRAM | 32MB |
Cache | 64/128/256KB |
BIOS | AMI |
Dimensions | 330mm x 218mm |
I/O Options | None |
NPU Options | 80387 |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
External battery | JP2 | Turbo switch | JP15 |
Reset switch | JP8 | Turbo LED | JP16 |
Power LED & keylock | JP14 | Speaker | JP17 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
| » | Parity check enabled | JP5 | Closed |
Parity check disabled | JP5 | Open | |
Monitor type select color | JP6 | Open | |
Monitor type select monochrome | JP6 | Closed | |
| » | Factory configured - do not alter | JP19 | N/A |
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 (U26) | TAG (U42) |
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 |
CACHE JUMPER CONFIGURATION | ||||||
Size | JP8A | JP8B | JP8C | JP8D | JP8E | JP8F |
64KB | 2 & 3 | 2 & 3 | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 2 |
128KB | 1 & 2 | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 |
256KB | 2 & 3 | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 2 | 2 & 3 |
Note:Pins designated should be in the closed position. | ||||||
CPU TYPE CONFIGURATION | |
Type | W1 & W2 |
80386DX | 2 & 3, 5 & 6, 8 & 9,11 & 12, 14 & 15, 17 & 18, and 20 & 21 |
80486DLC | 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, 16 & 17, and 19 & 20 |
80486SX | 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, 16 & 17, and 19 & 20 |
80487SX | 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, 16 & 17, and 19 & 20 |
80486DX | 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, 16 & 17, and 19 & 20 |
80486DX2 | 1 & 2, 4 & 5, 7 & 8, 10 & 11, 13 & 14, 16 & 17, and 19 & 20 |
Notes:Pins designated should be in the closed position. | |
CPU TYPE CONFIGURATION (CON’T) | |||
Type | JP12 | JP13 | JP30 |
80386DX | N/A | N/A | N/A |
80486DLC | pins 1 & 2 closed | pins 1 & 2 closed | pins 1 & 2 closed |
80486SX | pins 2 & 3 closed | pins 2 & 3 closed | N/A |
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 |
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