SOYO COMPUTER CO., LTD.
SY-020H
|
|
Processor | 80486SX/80487SX/80486DX |
Processor Speed | 16/20/25/33/40/50(internal)/50/66(internal)MHz |
Chip Set | SIS |
Max. Onboard DRAM | 32MB |
Cache | 32/64/128/256KB |
BIOS | AMI |
Dimensions | 245mm x 220mm |
I/O Options | None |
NPU Options | 4167 |
|
|
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Power LED & keylock | J17 | External battery | J20 |
Speaker | J18 | Turbo switch | J21 |
Reset switch | J19 | Turbo LED | J22 |
Note:The oscillator at OSC1 must match the external speed of the CPU installed. |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | Monitor type select monochrome | JP3 | Open |
| Monitor type select color | JP3 | Closed |
» | CMOS memory normal operation | JP5 | pins 1 & 2 closed |
| CMOS memory clear | JP5 | pins 2 & 3 closed |
» | Power good signal detect from board | JP7 | pins 1 & 2 closed |
| Power good signal detect from power supply | JP7 | pins 2 & 3 closed |
» | Keyboard BIOS clock source select programmable timer | JP18 | pins 1 & 2 closed |
| Keyboard BIOS clock source select 7MHz | JP18 | pins 2 & 3 closed |
» | CPU speed select ³ to 25MHz | JP19 | pins 1 & 2 closed |
| CPU speed select < 25MHz | JP19 | pins 2 & 3 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 |
CACHE CONFIGURATION | |||
Size | Bank 0 | Bank 1 | TAG |
32KB | (4) 8K x 8 | NONE | (2) 4K x 4 |
64KB | (4) 8K x 8 | (4) 8K x 8 | (2) 4K x 4 |
128KB | (4) 32K x 8 | NONE | (2) 16K x 4 |
256KB | (4) 32K x 8 | (4) 32K x 8 | (2) 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 CONFIGURATION | |||
Type | JP24 | JP25 | JP26 |
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 |