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 (CONT) | |||||||
|
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 |