MICRO EXPRESS, INC.
FOREX 386/486 (REV. B2/B3)
Processor | 80386DX/80486SX/80487SX/80486DX /80486DX2 |
Processor Speed | 20/25/33/40/50(internal)/50/66(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 | 80387DX/3167 |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
External battery | JP2 | Speaker | JP10 |
Reset switch | JP8 | Turbo switch | JP15 |
Power LED & keylock | JP9 | Turbo LED | JP16 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | Factory configured - do not alter | 2E | N/A |
» | Factory configured - do not alter | JP5 | N/A |
» | CMOS memory normal operation | JP6 | Open |
CMOS memory clear | JP6 | Closed | |
Note: The location of JP5 is unidentified. |
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 0 | TAG 1 |
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 | NONE | (1) 32K x 8 |
CACHE JUMPER CONFIGURATION | |||||
Size | JP8A | JP8B | JP8C | JP8E | JP8F |
64KB | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & 2 |
128KB | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 2 | 1 & 2 |
256KB | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 |
Note: Pins desingated 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 |
CPU TYPE CONFIGURATION | |||||||
Type | 1A | 1C | 1D | 1E | 1F | 1G | 2A |
80386 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
80486 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 |
Note: Pins designated should be in the closed position. The location of W1X & W2X are unidentified. |
CPU TYPE CONFIGURATION (CON’T) | |||||||
Type | 2C | 2D | 2G | 2H | W1B | W1X | W2X |
80386 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
80486 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 |
Note: Pins designated should be in the closed position. The location of W1X & W2X are unidentified. |
CPU CLOCK SPEED CONFIGURATION | ||||
Speed | JP7A | JP7B | JP7C | JP7D |
20MHz | pins 2 & 3 closed | pins 1 & 2 closed | pins 1 & 2 closed | pins 2 & 3 closed |
25MHz | pins 1 & 2 closed | pins 2 & 3 closed | pins 1 & 2 closed | pins 2 & 3 closed |
33MHz | pins 1 & 2 closed | pins 1 & 2 closed | pins 2 & 3 closed | pins 2 & 3 closed |
40MHz | pins 2 & 3 closed | pins 2 & 3 closed | pins 1 & 2 closed | pins 2 & 3 closed |
50iMHz | pins 1 & 2 closed | pins 2 & 3 closed | pins 1 & 2 closed | pins 2 & 3 closed |
50MHz | pins 2 & 3 closed | pins 1 & 2 closed | pins 2 & 3 closed | pins 2 & 3 closed |
66iMHz | pins 1 & 2 closed | pins 1 & 2 closed | pins 2 & 3 closed | pins 1 & 2 closed |
80MHz | pins 2 & 3 closed | pins 2 & 3 closed | pins 1 & 2 closed | pins 1 & 2 closed |