80486-33A Motherboard Settings and Configuration
CALIBER COMPUTER
80486-33A
Processor | 80486DX |
Processor Speed | 33MHz |
Chip Set | OPTI |
Max. Onboard DRAM | 32MB |
Cache | 64/256KB |
BIOS | AMI |
Dimensions | 330.2mm x 218.4mm |
I/O Options | 32-bit external memory card slot |
NPU Options | 4167 |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
External battery | J10 | 32-bit external memory card | S1 |
Power LED & keylock | J23 | Reset switch | SW1 |
Speaker | J24 | Turbo switch | SW2 |
Turbo LED | JP12 |
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USER CONFIGURABLE SETTINGS | |||
» | 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 iOSC/4 | JP3 | Open |
| Bus speed select iOSC/6 | JP3 | Closed |
DRAM CONFIGURATION | ||
Size | Bank 0 | Bank 1 |
4MB | (4) 1M x 9 | NONE |
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 | TAG (U33) | TAG (U34) |
64KB | (8) 8K x 8 | (1) 32K x 1 | (1) 8K x 8 |
256KB | (8) 32K x 8 | (1) 32K x 1 | (1) 32K x 8 |
CACHE JUMPER CONFIGURATION | ||||
Size | JP8 | JP9 | JP10 | JP11 |
64KB | Open | Open | Open | Open |
256KB | Closed | Closed | Open | Closed |
CPU TYPE CONFIGURATION | |||
Type | JP5 | JP6 | JP7 |
80486SX | Open | pins 2 & 3 closed | Open |
80487SX | pins 1 & 2 closed | pins 1 & 2 closed | Closed |
80486DX | pins 2 & 3 closed | pins 1 & 2 closed | Closed |
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