SILICON VALLEY TECHNOLOGY
OPTI-486
|
Processor |
80486SX/80486DX |
|
Processor Speed |
33/40MHz |
|
Chip Set |
OPTI |
|
Max. Onboard DRAM |
32MB |
|
Cache |
64/256KB |
|
BIOS |
AMI/MR |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
None |
|
NPU Options |
4167 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
External battery |
J11 |
Turbo LED |
JP11 |
|
Power LED & keylock |
J20 |
Reset switch |
SW1 |
|
Speaker |
J21 |
Turbo switch |
SW2 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
CMOS memory normal operation |
JP1 |
pins 2 & 3 closed | |
|
CMOS memory clear |
JP1 |
pins 1 & 2 closed | |
|
Monitor type select color |
JP2 |
Closed | |
|
Monitor type select monochrome |
JP2 |
Open | |
|
Bus clock speed select ATCLK/4 |
JP6 |
Closed | |
|
Bus clock speed select ATCLK/6 |
JP6 |
Open | |
|
CPU speed select double frequency clock |
JP7 |
pins 2 & 3 closed | |
|
CPU speed select singal phase clock |
JP7 |
pins 1 & 2 closed | |
|
DRAM CONFIGURATION | ||
|
Size |
Bank 0 |
Bank 1 |
|
4MB |
(4) 1M x 9 |
NONE |
|
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
|
12MB |
(4) 1M x 9 |
(4) 1M x 9 |
|
16MB |
(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 |
Cache |
TAG |
|
64KB |
(8) 8K x 8 |
(1) 4K x 8 |
|
256KB |
(8) 32K x 8 |
(1) 16K x 8 |
|
CACHE JUMPER CONFIGURATION | ||||
|
Size |
JP8 |
JP9 |
JP10 |
JP12 |
|
64KB |
Open |
Open |
Open |
Open |
|
256KB |
Open |
Closed |
Closed |
Closed |
|
CPU TYPE CONFIGURATION | |||
|
Size |
JP3 |
JP4 |
JP5 |
|
80486SX |
Open |
Open |
pins 2 & 3 closed |
|
80486DX |
pins 2 & 3 closed |
Closed |
pins 1 & 2 closed |