UNIDENTIFIED
OPTI495SLC VL-BUS 3/486
|
Processor |
80386DX/CX486DLC/80486SX/80487DX/80486DX/80486DX2 |
|
Processor Speed |
25/33/40/50(internal)/50/66(internal)MHz |
|
Chip Set |
OPTI |
|
Max. Onboard DRAM |
64MB |
|
Cache |
64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
230mm x 218mm |
|
I/O Options |
32-bit VESA local bus slots (2) |
|
NPU Options |
80387DX |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Turbo switch |
J1 |
Reset switch |
J5 |
|
Power LED & keylock |
J2 |
External battery |
J6 |
|
Speaker |
J3 |
32-bit VESA Local bus slots |
SL1 & SL2 |
|
Turbo LED |
J4 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
|
Turbo mode enabled |
J1 |
Open |
|
Turbo mode disabled |
J1 |
Closed | |
|
|
CMOS memory normal operation (Internal Battery) |
J6 |
pins 2 & 3 closed |
|
CMOS memory clear |
J6 |
pins 3 & 4 closed | |
|
|
Factory configured - do not alter |
JP7 |
N/A |
|
|
Factory configured - do not alter |
JP9 |
N/A |
|
|
Cyrix PQFP disabled |
JP10 |
Closed |
|
Cyrix PQFP enabled |
JP10 |
Open | |
|
|
80386DX/80486SX PQFP disabled |
JP16 |
Closed |
|
80386DX/80486SX PQFP enabled |
JP16 |
Open | |
|
|
Monitor type select monochrome |
JP21 |
Open |
|
Monitor type select color |
JP21 |
Closed | |
|
|
Battery type select NI-CD recharge |
JP29 |
pins 2 & 3 closed |
|
Battery type select Lithum discharge |
JP29 |
pins 1 & 2 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 |
|
5MB |
(4) 256K x 9 |
(4) 1M x 9 |
|
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
|
16MB |
(4) 4M x 9 |
NONE |
|
17MB |
(4) 256K x 9 |
(4) 4M x 9 |
|
20MB |
(4) 1M x 9 |
(4) 4M x 9 |
|
20MB |
(4) 4M x 9 |
(4) 1M x 9 |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
|
64MB |
(4) 16M x 9 |
NONE |
|
CACHE CONFIGURATION | |||
|
Size |
Bank 0 |
Bank 1 |
TAG |
|
64KB |
(4) 8K x 8 |
(4) 8K x 8 |
(1) 8K x 8 |
|
128KB |
(4) 32K x 8 |
NONE |
(1) 8K x 8 |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 32K x 8 |
|
CACHE JUMPER CONFIGURATION | |||||||
|
Size |
JP13 |
JP17 |
JP18 |
JP20 |
JP24 |
JP27 |
JP28 |
|
64KB |
Open |
Open |
2 & 3 |
1 & 2 |
Open |
Open |
Open |
|
128KB |
Open |
Closed |
1 & 2 |
2 & 3 |
Open |
Open |
Open |
|
256KB |
Closed |
Closed |
2 & 3 |
1 & 2 |
Open |
Open |
Open |
|
Note: Pins designated should be in the closed position. | |||||||
|
CPU TYPE CONFIGURATION | |||
|
CPU Type |
JP12 |
JP14 |
JP15 |
|
80386 |
pins 1 & 2 closed |
pins 1 & 2 closed |
Open |
|
80486 |
pins 2 & 3 closed |
pins 2 & 3 closed |
Closed |
|
CPU TYPE CONFIGURATION (80486) | |||
|
Type |
JP5 |
JP6 |
JP19 |
|
80486SX |
Open |
Open |
pins 2 & 3 closed |
|
80487SX |
pins 2 & 3 closed |
Closed |
pins 1 & 2 closed |
|
80486DX/DX2 |
pins 1 & 2 closed |
Closed |
pins 1 & 2 closed |
|
Overdrive |
pins 2 & 3 closed |
Closed |
pins 1 & 2 closed |
|
CPU SPEED CONFIGURATION (80386DX & CX486DLC) | |||||
|
Speed |
JP1 |
JP2 |
JP3 |
JP4 |
JP22 |
|
33MHz |
Closed |
Open |
Closed |
2 & 3 |
Open |
|
40MHz |
Closed |
Closed |
Closed |
2 & 3 |
Open |
|
Note: Pins designated should be in the closed position. | |||||
|
CPU SPEED CONFIGURATION (80486) | |||||
|
Speed |
JP1 |
JP2 |
JP3 |
JP4 |
JP22 |
|
25MHz |
Open |
Open |
Open |
1 & 2 |
Closed |
|
33MHz |
Open |
Closed |
Open |
1 & 2 |
Open |
|
40MHz |
Closed |
Closed |
Open |
1 & 2 |
Open |
|
50iMHz |
Open |
Open |
Open |
1 & 2 |
Closed |
|
50MHz |
Closed |
Open |
Open |
1 & 2 |
Open |
|
66iMHz |
Open |
Closed |
Open |
1 & 2 |
Open |
|
Note: Pins designated should be in the closed position. | |||||
|
VESA CARD CONFIGURATION | |
|
Card Type |
JP23 |
|
Use standard VESA card with (all CPUs) |
pins 1 & 2 closed |
|
Use DC-680DT VGA, Tekram VESA cache IDE or other special card (486DX-50 only) |
pins 2 & 3 closed |