UNIDENTIFIED
OPTI486DX-33/50WB, 486SX-20/25WB
|
Processor |
80486SX/80486DX |
|
Processor Speed |
20/25/33/50(internal)MHz |
|
Chip Set |
OPTI |
|
Max. Onboard DRAM |
40MB (8MB on external memory card) |
|
Cache |
64/256KB |
|
BIOS |
AMI |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
32-bit external memory card |
|
NPU Options |
4167 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
External battery |
J10 |
32-bit external memory card |
SL1 |
|
Turbo LED |
J12 |
Reset switch |
SW1 |
|
Power LED & keylock |
J23 |
Turbo switch |
SW2 |
|
Speaker |
J24 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
|
Monitor type select monochrome |
JP1 |
Open |
|
Monitor type select color |
JP1 |
Closed | |
|
|
CMOS memory normal operation |
JP2 |
pins 2 & 3 closed |
|
CMOS memory clear |
JP2 |
pins 1 & 2 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) 256K x 9 |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 256K x 9 |
|
4MB |
(4) 1M x 9 |
NONE |
NONE |
NONE |
|
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) 1M x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
|
16MB |
(4) 4M x 9 |
NONE |
NONE |
NONE |
|
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. | ||||
|
CACHE CONFIGURATION | |||
|
Size |
Bank 0 |
Bank 1 |
TAG |
|
64KB |
(4) 8K x 8 |
(4) 8K x 8 |
(1) 8K x 8 |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 32K x 8 |
|
CACHE JUMPER CONFIGURATION | ||||
|
Size |
JP8 |
JP9 |
JP10 |
JP11 |
|
64KB |
Open |
Open |
Open |
Open |
|
256KB |
Closed |
Closed |
Closed |
Closed |
|
CPU TYPE CONFIGURATION | |||
|
Type |
JP5 |
JP6 |
JP7 |
|
80486SX |
pins 1 & 2 closed |
pins 2 & 3 closed |
Open |
|
80486DX |
pins 2 & 3 closed |
pins 1 & 2 closed |
Closed |