DATAEXPERT CORPORATION
OPTI-495XLC 3/486WB CACHE
Processor | 80386DX/80486SX/80486DX/80486DX2/Pentium Overdrive |
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 |
Power LED & keylock | J1 | Turbo LED | J5 |
Speaker | J2 | External battery | J6 |
Turbo switch | J3 | 32-bit VESA Local bus slot | S1 |
Reset switch | J4 | 32-bit VESA Local bus slot | S2 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | CMOS memory normal operation (Internal battery) | J6 | pins 2 & 3 closed |
CMOS memory clear | J6 | pins 3 & 4 closed | |
» | Monitor type select color | JP21 | Closed |
Monitor type select monochrome | JP21 | Open | |
» | Factory configured - do not alter | JP23 | N/A |
» | Battery type select - NI-CD recharge | JP26 | pins 2 & 3 closed |
Battery type select - Lithum discharge | JP26 | 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 | JP10 | JP11 | JP16 | JP17 |
64KB | pins 2 & 3 closed | pins 2 & 3 closed | Open | Open |
128KB | pins 1 & 2 closed | pins 1 & 2 closed | Closed | Open |
256KB | pins 2 & 3 closed | pins 2 & 3 closed | Closed | Closed |
80386/80486 CONFIGURATION | |||||
Type | JP14 | JP15 | JP20 | JP25 | JP30 |
80386 | Open | Open | pins 2 & 3 | pins 1 & 2 | pins 2 & 3 |
80486 | Closed | Closed | pins 1 & 2 | pins 2 & 3 | pins 1 & 2 |
Note:Pins designated should be in the closed position. |
CPU TYPE CONFIGURATION | |||
Type | JP2 | JP18 | JP19 |
80486SX (PGA) | Open | Open | pins 2 & 3 closed |
80486SX (PQFP) | Open | Closed | pins 2 & 3 closed |
80486DX | pins 1 & 2 closed | Closed | pins 1 & 2 closed |
80486DX2 | pins 1 & 2 closed | Closed | pins 1 & 2 closed |
Pentium Overdrive | pins 2 & 3 closed | Closed | pins 1 & 2 closed |
CPU SPEED CONFIGURATION | |||||
Speed | JP6 | JP7 | JP8 | JP9 | JP22 |
80386DX/33MHz | Open | Open | Closed | pins 1 & 2 | Open |
80486SX/25MHz | Open | Open | Open | pins 1 & 2 | Closed |
80486SX/33MHz | Open | Open | Closed | pins 1 & 2 | Open |
80486DX/25MHz | Open | Open | Open | pins 1 & 2 | Closed |
80486DX/40MHz | Open | Closed | Closed | pins 1 & 2 | Open |
80486DX/50i MHz | Open | Open | Open | pins 1 & 2 | Closed |
80486DX/50MHz | Open | Closed | Open | pins 1 & 2 | Open |
80486DX/66i MHz | Open | Open | Closed | pins 1 & 2 | Open |
Note:Pins designated should be in the closed position. |