DATAEXPERT CORPORATION
OPTI-495SX
|
Device Type |
Mainboard |
|
Processor |
80386DX/80486SX/80487SX/80486DX/80486DX2/ODP486 |
|
Processor Speed |
25/33/40/50(internal)/50/66(internal)MHz |
|
Chip Set |
OPTI495SX |
|
Maximum Onboard Memory |
32MB |
|
Cache |
64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
254mm x 218mm |
|
I/O Options |
32-bit VESA local bus slot |
|
NPU Options |
80387DX |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Power LED & keylock |
J1 |
Reset switch |
J5 |
|
Speaker |
J2 |
External battery |
JP18 |
|
Turbo switch |
J3 |
32-bit VESA local bus slot |
SL1 |
|
Turbo LED |
J4 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Label |
Position | |
|
|
Factory configured - do not alter |
JP8 |
Unidentified |
|
|
Factory configured - do not alter |
JP9 |
Unidentified |
|
|
Factory configured - do not alter |
JP10 |
Unidentified |
|
|
Factory configured - do not alter |
JP11 |
Unidentified |
|
Monitor type select color |
JP17 |
Closed | |
|
Monitor type select monochrome |
JP17 |
Open | |
|
|
CMOS memory normal operation |
JP18 |
Pins 2 & 3 closed |
|
CMOS memory clear |
JP18 |
Pins 3 & 4 closed | |
|
Battery type select external |
JP18 |
Closed | |
|
|
Factory configured - do not alter |
JP23 |
Unidentified |
|
|
Factory configured - do not alter |
JP29 |
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) 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 |
JP6 |
JP7 |
JP12 |
JP13 |
|
64KB |
Open |
Open |
Open |
Pins 2 & 3 closed |
|
128KB |
Open |
Closed |
Closed |
Pins 1 & 2 closed |
|
256KB |
Closed |
Closed |
Closed |
Pins 2 & 3 closed |
|
CPU SPEED SELECTION | ||||
|
Speed |
JP14 |
JP15 |
JP16 |
JP22 |
|
25MHz |
Pins 1 & 2 closed |
Open |
Closed |
N/A |
|
33MHz (386) |
Pins 2 & 3 closed |
Closed |
Open |
Closed |
|
33MHz |
Pins 1 & 2 closed |
Closed |
Open |
N/A |
|
40MHz (386) |
Pins 2 & 3 closed |
Open |
Open |
Open |
|
50iMHz |
Pins 1 & 2 closed |
Open |
Closed |
N/A |
|
50MHz |
Pins 2 & 3 closed |
Open |
Closed |
N/A |
|
66iMHz |
Pins 1 & 2 closed |
Closed |
Open |
N/A |
|
CPU TYPE SELECTION | |||
|
Type |
JP1 |
JP2 |
JP4 |
|
80486SX |
Open |
Pins 2 & 3 closed |
Open |
|
80487SX |
Closed |
Pins 1 & 2 closed |
Pins 2 & 3 closed |
|
80486DX |
Closed |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
|
80486DX2 |
Closed |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
|
ODP486 |
Closed |
Pins 1 & 2 closed |
Pins 2 & 3 closed |
|
CPU TYPE SELECTION | ||||
|
Type |
JP3 |
JP5 |
JP21 |
JP24 |
|
80386 (PQFP) |
Pins 2 & 3 closed |
Pins 1 & 2 closed |
Open |
Pins 1 & 2 closed |
|
80486 (PGA) |
Pins 1 & 2 closed |
Pins 2 & 3 closed |
Closed |
Pins 2 & 3 closed |
|
80486 (PQFPGA) |
Pins 1 & 2 closed |
Pins 2 & 3 closed |
Open |
Pins 2 & 3 closed |