UNIDENTIFIED
OPTI 486-25/33
Processor |
80486SX |
Processor Speed |
25/33 |
Chip Set |
OPTI |
Max. Onboard DRAM |
32MB |
Cache |
64/128KB (external cache card) |
BIOS |
AMI |
Dimensions |
330mm x 218mm |
I/O Options |
32-bit external memory card, 32-bit external cache card |
NPU Options |
4167 |
CONNECTIONS | |||
Purpose |
Location |
Purpose |
Location |
External battery |
J1 |
Power LED & keylock |
J27 |
Turbo LED |
J25 |
Reset switch |
SW1 |
Speaker |
J26 |
32-bit external memory card |
SL1 |
USER CONFIGURABLE SETTINGS | |||
Function |
Jumper |
Position | |
» |
Monitor type select color |
JP2 |
Closed |
Monitor type select monochrome |
JP2 |
Open | |
» |
Cache enabled |
JP5, JP6 |
Open |
Cache disabled |
JP5, JP6 |
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 |
3MB |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 256K x 9 |
NONE |
4MB |
(4) 1M x 9 |
NONE |
NONE |
NONE |
4MB |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 256K x 9 |
5MB |
(4) 256K x 9 |
(4) 1M x 9 |
NONE |
NONE |
6MB |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 1M x 9 |
NONE |
7MB |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 1M x 9 |
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) 4M x 9 |
NONE |
NONE |
NONE |
16MB |
(4) 1M 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) 4M x 9 |
(4) 1M x 9 |
NONE |
40MB |
(4) 4M x 9 |
(4) 4M x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
Note:Banks 2 & 3 are located on the external memory card.. |
EXTERNAL CACHE CARD JUMPER CONFIGURATION | |||||
Size |
JP1 |
JP2 |
JP3 |
JP4 |
JP5 |
64KB |
1 & 2 |
Open |
Open |
1 & 2 |
1 & 2 |
128KB |
2 & 3 |
Closed |
Closed |
2 & 3 |
2 & 3 |
Note:Pins designated should be in the closed position. JP1-5 are located on the external cache card. |