FOREX 486 CACHE Motherboard Settings and Configuration
MICRO EXPRESS, INC.
FOREX 486 CACHE
Processor | 80486SX/80487SX/80486DX/80486DX2 |
Processor Speed | 20/25/33/50 (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 | 32-bit VESA local bus slots (2) |
NPU Options | None |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
External battery | JP2 | Turbo switch | JP15 |
Reset switch | JP3 | Turbo LED | JP16 |
Power LED & keylock | JP9 | 32-bit VESA local bus slot | S1 |
Speaker | JP10 | 32-bit VESA local bus slot | S2 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper/Switch | Position | |
» | Factory configured - do not alter | JP5 | N/A |
» | CMOS memory normal operation | JP6 | Open |
| CMOS memory clear | JP6 | 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 |
64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 4 |
128KB | (4) 32K x 8 | NONE | (1) 8K x 4 |
256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 4 |
CACHE JUMPER CONFIGURATION | ||||
Size | JP8A | JP8B | JP8D | JP8E |
64KB | pins 1 & 2 closed | pins 2 & 3 closed | pins 1 & 2 closed | pins 2 & 3 closed |
128KB | pins 2 & 3 closed | pins 1 & 2 closed | pins 2 & 3 closed | pins 1 & 2 closed |
256KB | pins 2 & 3 closed | pins 1 & 2 closed | pins 2 & 3 closed | pins 1 & 2 closed |
VESA WAIT STATE/BUS SPEED (ID2 & ID3) CONFIGURATION | |||
CPU speed | Wait states | JP102 (ID2) | JP103 (ID3) |
£ 33MHz | 0 wait states | pins 1 & 2 closed | pins 1 & 2 closed |
> 33MHz | 1 wait state | pins 2 & 3 closed | pins 2 & 3 closed |
CPU SPEED CONFIGURATION | |||
Speed | JP7A | JP7B | JP7C |
20MHz | pins 2 & 3 closed | pins 1 & 2 closed | pins 1 & 2 closed |
25MHz | pins 1 & 2 closed | pins 2 & 3 closed | pins 1 & 2 closed |
33MHz | pins 1 & 2 closed | pins 2 & 3 closed | pins 2 & 3 closed |
50i MHz | pins 1 & 2 closed | pins 2 & 3 closed | pins 1 & 2 closed |
50MHz | pins 2 & 3 closed | pins 2 & 3 closed | pins 2 & 3 closed |
66i MHz | pins 1 & 2 closed | pins 2 & 3 closed | pins 2 & 3 closed |
CPU TYPE CONFIGURATION | ||||
Type | JP12 | JP13 | JP29 | JP30 |
80486SX/PQFP | pins 2 & 3 closed | pins 2 & 3 closed | pins 2 & 3 closed | pins 2 & 3 closed |
80486SX/PGA | pins 2 & 3 closed | pins 2 & 3 closed | pins 2 & 3 closed | pins 2 & 3 closed |
80487SX/PGA | pins 1 & 2 closed | pins 1 & 2 closed | pins 2 & 3 closed | pins 2 & 3 closed |
80486DX/PQFP | pins 2 & 3 closed | pins 2 & 3 closed | pins 2 & 3 closed | pins 2 & 3 closed |
80486DX/PGA | pins 1 & 2 closed | pins 1 & 2 closed | pins 1 & 2 closed | pins 1 & 2 closed |
80486DX2/PQFP | pins 2 & 3 closed | pins 2 & 3 closed | pins 2 & 3 closed | pins 2 & 3 closed |
80486DX2/PGA | pins 1 & 2 closed | pins 1 & 2 closed | pins 1 & 2 closed | pins 1 & 2 closed |
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