UNIDENTIFIED
SI-433C1/SI-450C1
Processor | 80486SX/80487SX/80486DX |
Processor Speed | 16/20/25/33/50MHz |
Chip Set | Unidentified |
Max. Onboard DRAM | 32MB |
Cache | 32/64/128/256KB |
BIOS | AMI |
Dimensions | 330mm x 218mm |
I/O Options | None |
NPU Options | 4167 |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
External battery | CN3 | Power LED & keylock | CN6 |
Reset switch | CN4 | Speaker | CN7 |
Turbo switch | CN5 | Turbo LED | LED2 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | Power good signal detect from board | JP7 | pins 1 & 2 closed |
Power good signal detect from power supply | JP7 | pins 2 & 3 closed | |
» | CMOS memory normal operation | JP17 | pins 1 & 2 closed |
CMOS memory clear | JP17 | pins 2 & 3 closed | |
» | Monitor type select monochrome | JP19 | Open |
Monitor type select color | JP19 | 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 |
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 |
DRAM JUMPER CONFIGURATION | ||
Setting | JP20 | JP21 |
Bank 0 | pins 2 & 3 closed | pins 1 & 2 closed |
Bank 1 | pins 1 & 2 closed | pins 2 & 3 closed |
CACHE CONFIGURATION | |||||
Size | Bank 0 | Bank 1 | TAG (U21) | TAG (U22) | TAG (U39) |
32KB | (4) 8K x 8 | NONE | (1) 4K x 4 | (1) 4K x 4 | NONE |
64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 4K x 4 | (1) 4K x 4 | (1) 16K x 4 |
128KB | (4) 32K x 8 | NONE | (1) 16K x 4 | (1) 16K x 4 | (1) 16K x 4 |
256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 16K x 4 | (1) 16K x 4 | (1) 16K x 4 |
CACHE JUMPER CONFIGURATION | |||||||||
Size | JP8 | JP9 | JP10 | JP11 | JP12 | JP13 | JP14 | JP15 | JP16 |
32KB | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 | 1 & 2 |
64KB | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 | 1 & 2 | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 2 |
128KB | 2 & 3 | 2 & 3 | 1 & 2 | 2 & 3 | 2 & 3 | 1 & 2 | 1 & 2 | 1 & 2 | 2 & 3 |
256KB | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 | 2 & 3 |
Note: Pins designated should be in the closed position. |
CPU TYPE CONFIGURATION | |||
Type | JP4 | JP5 | JP6 |
80486SX | pins 2 & 3 closed | Open | Open |
80487SX | pins 1 & 2 closed | Closed | pins 2 & 3 closed |
80486DX | pins 1 & 2 closed | Closed | pins 1 & 2 closed |
CPU SPEED CONFIGURATION | |
Speed | JP3 |
16MHz | pins 2 & 3 closed |
20MHz | pins 2 & 3 closed |
25MHz | pins 2 & 3 closed |
33MHz | pins 1 & 2 closed |
50MHz | pins 1 & 2 closed |