80386 WRITE BACK CACHE Motherboard Settings and Configuration
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80386 WRITE BACK CACHE
Processor | 80386DX |
Processor Speed | 33/40MHz |
Chip Set | OPTI |
Max. Onboard DRAM | 32MB |
Cache | 256KB |
BIOS | AMI |
Dimensions | 355mm x 304mm |
I/O Options | 32-bit external memory card slot |
NPU Options | 80387/3167 |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Turbo LED | JP4 | Power LED & keylock | J23 |
Reset switch | SW1 | Speaker | J24 |
Turbo switch | SW2 | 32-bit external memory card | S1 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
| » | Battery select internal | J10 | pins 2 & 3 closed |
Battery select external | J10 | Closed | |
| » | Monitor type select color | JP1 | Closed |
Monitor type select monochrome | JP1 | Open | |
| » | CMOS memory normal operation | JP2 | pins 2 & 3 closed |
CMOS memory clear | JP2 | pins 1 & 2 closed | |
| » | Bus speed select ATCLK/6 | JP3 | Open |
Bus speed select ATCLK/8 | JP3 | Closed | |
DRAM CONFIGURATION | ||||
Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
1MB | (4) 256K x 9 | NONE | NONE | NONE |
2MB | (4) 256K x 9 | (4) 256K x 9 | NONE | NONE |
4MB | (4) 1M x 9 | NONE | NONE | NONE |
5MB | (4) 256K x 9 | (4) 1 M x 9 | NONE | NONE |
8MB | (4) 1M x 9 | (4) 1M x 9 | NONE | NONE |
12MB | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 | NONE |
16MB | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 |
16MB | (4) 4M x 9 | NONE | NONE | NONE |
20MB | (4) 4M x 9 | (4) 1M x 9 | NONE | NONE |
24MB | (4) 4M x 9 | (4) 1M x 9 | (4) 1M x 9 | NONE |
28MB | (4) 4M x 9 | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 |
32MB | (4) 4M x 9 | (4) 4M x 9 | NONE | NONE |
36MB | (4) 4M x 9 | (4) 1M x 9 | (4) 4M x 9 | NONE |
40MB | (4) 4M x 9 | (4) 4M x 9 | (4) 1M x 9 | (4) 1M x 9 |
48MB | (4) 4M x 9 | (4) 4M x 9 | (4) 4M x 9 | NONE |
52MB | (4) 4M x 9 | (4) 4M x 9 | (4) 4M x 9 | (4) 1M x 9 |
64MB | (4) 4M x 9 | (4) 4M x 9 | (4) 4M x 9 | (4) 4M x 9 |
CACHE CONFIGURATION | |||
Size | Bank 0 | Bank 1 | TAG |
32KB | (4) 8K x 8 | NONE | 2K x 9 |
64KB | (4) 8K x 8 | (4) 8K x 8 | 4K x 9 |
128KB | (4) 32K x 8 | NONE | 8K x 9 |
256KB | (4) 32K x 8 | (4) 32K x 8 | 16K x 9 |
Note:The location of cache chips is unidentified. | |||
CACHE JUMPER CONFIGURATION | ||||||
Size | JP5 | JP6 | JP7 | JP8 | JP9 | JP10 |
32KB | 1 & 2 | 1 & 2 | 1 & 2 | Open | 2 & 3 | 2 & 3 |
64KB | 2 & 3 | 1 & 2 | 1 & 2 | Open | 2 & 3 | 1 & 2 |
128KB | 2 & 3 | 1 & 2 | 2 & 3 | Closed | 2 & 3 | 1 & 2 |
256KB | 2 & 3 | 2 & 3 | 2 & 3 | Closed | 1 & 2 | 1 & 2 |
Note: Pins designated should be in the closed position. | ||||||
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