DATAEXPERT CORPORATION
OPTI-495SX-2VL
|
Device Type |
Mainboard |
|
Processor |
80386DX/CX486DLC/CX486DLC/80486SX/80486DX |
|
Processor Speed |
8/10/12/16/20/25/33/40/50(internal)/50/60/66(internal)/66/75 (internal)/80(internal)/100(internal)/120(internal)/75/90MHz |
|
Chip Set |
OPTI |
|
Maximum Onboard Memory |
32MB |
|
Cache |
64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
254mm x 218mm |
|
I/O Options |
32-bit VESA local bus slots (2) |
|
NPU options |
80387, CX87DLC |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Power LED & keylock |
J1 |
Reset switch |
J5 |
|
Speaker |
J2 |
External battery |
JP35 |
|
Turbo switch |
J3 |
32-bit VESA local bus slots |
SL1 SL2 |
|
Turbo LED |
J4 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Label |
Position | |
|
|
Factory configured - do not alter |
JP2 |
Unidentified |
|
|
Factory configured - do not alter |
JP2 |
Unidentified |
|
|
Factory configured - do not alter |
JP4 |
Unidentified |
|
|
Factory configured - do not alter |
JP5 |
Unidentified |
|
|
Factory configured - do not alter |
JP6 |
Unidentified |
|
|
Factory configured - do not alter |
JP17 |
Unidentified |
|
|
Factory configured - do not alter |
JP18 |
Unidentified |
|
|
Factory configured - do not alter |
JP19 |
Unidentified |
|
|
Factory configured - do not alter |
JP20 |
Unidentified |
|
|
Factory configured - do not alter |
JP21 |
Unidentified |
|
|
Factory configured - do not alter |
JP22 |
Unidentified |
|
|
Factory configured - do not alter |
JP23 |
Unidentified |
|
|
Factory configured - do not alter |
JP4 |
Unidentified |
|
|
Factory configured - do not alter |
JP31 |
Unidentified |
|
Monitor type select color |
JP34 |
Closed | |
|
Monitor type select monochrome |
JP34 |
Open | |
|
|
CMOS memory normal operation |
JP35 |
Pins 2 & 3 closed |
|
CMOS memory clear |
JP35 |
Pins 3 & 4 closed | |
|
Battery type select external |
JP35 |
Closed | |
|
80387 PGA installed |
JP36 |
Closed | |
|
80387 PQFP installed |
JP36 |
Open | |
|
|
Factory configured - do not alter |
S1 |
Unidentified |
|
|
Factory configured - do not alter |
S2 |
Unidentified |
|
|
Factory configured - do not alter |
S3 |
Unidentified |
|
SIMM 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 |
|
5MB |
(4) 1M x 9 |
(4) 256K 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 |
|
17MB |
(4) 4M x 9 |
(4) 256K 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 |
|
CACHE CONFIGURATION | |||
|
Size |
Bank 0 |
Bank 1 |
TAG |
|
64KB |
(4) 8K x 8 |
(4) 8K x 8 |
(1) 32K x 8 |
|
128KB |
(4) 32K x 8 |
None |
(1) 32K x 8 |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 32K x 8 |
|
CACHE JUMPER CONFIGURATION | ||||
|
Size |
JP25 |
JP26 |
JP27 |
JP28 |
|
64KB |
Pins 2 & 3 closed |
Open |
Open |
Open |
|
128KB |
Pins 1 & 2 closed |
Open |
Closed |
Closed |
|
256KB |
Pins 2 & 3 closed |
Closed |
Closed |
Closed |
|
CPU TYPE SELECTION | |
|
Type |
JP7 |
|
80386DX (PQFP) |
Open |
|
80386DX (PGA) |
Closed |
|
CX486DLC (PGA) |
Closed |
|
CX 486DLC |
Closed |
|
CPU TYPE SELECTION | ||||||
|
Type |
JP1 |
JP10 |
JP11 |
JP12 |
JP16 |
JP33 |
|
80386DX-25 |
Open |
Closed |
1 & 2 |
2 & 3 |
2 & 3 |
1 & 2 |
|
80386DX-33 |
Closed |
Open |
1 & 2 |
2 & 3 |
2 & 3 |
1 & 2 |
|
80386DX-40 |
Open |
Open |
1 & 2 |
2 & 3 |
2 & 3 |
1 & 2 |
|
CX486DLC-33 |
Closed |
Open |
1 & 2 |
2 & 3 |
2 & 3 |
1 & 2 |
|
CX486DLC-40 |
Open |
Open |
1 & 2 |
2 & 3 |
2 & 3 |
1 & 2 |
|
80486SX-25 |
Open |
Closed |
2 & 3 |
1 & 2 |
1 & 2 |
2 & 3 |
|
80486DX-33 |
Closed |
Open |
2 & 3 |
1 & 2 |
1 & 2 |
2 & 3 |
|
80486DX-50 |
Open |
Closed |
1 & 2 |
1 & 2 |
1 & 2 |
2 & 3 |
|
Note: Pins designated should be in the closed position. | ||||||
|
CPU SPEED SELECTION (80486 ONLY) | |||
|
Type |
JP8 |
JP29 |
JP30 |
|
80486SX |
Open |
Pins 2 & 3 closed |
Open |
|
80487SX |
Pins 2 & 3 closed |
Pins 1 & 2 closed |
Closed |
|
80486DX |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
Closed |