UNIDENTIFIED
VESA X86VLWB
Processor | 80386DX/80486SX/80486DX/80486DX2 |
Processor Speed | 25/33/40/50(internal)/66(internal)MHz |
Chip Set | Intel |
Max. Onboard DRAM | 32MB |
Cache | 64/128/256KB |
BIOS | AMI |
Dimensions | 330mm x 218mm |
I/O Options | 32-bit VESA local bus slots (2) |
NPU Options | 80387DX |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
External battery | J1 | Turbo LED | JP32 |
Power LED & keylock | J19 | 32-bit VESA Local bus slots | SL1, SL2 |
Speaker | J20 | Reset switch | SW1 |
Turbo switch | JP31 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | CMOS normal operation | JP1 | pins 2 & 3 closed |
CMOS memory clear | JP1 | pins 1 & 2 closed | |
Bus speed select - Clock/5 | JP3 | Closed | |
Bus speed select - Clock/4 | JP3 | Open | |
» | Monitor type select monochrome | JP4 | Closed |
Monitor type select color | JP4 | Open | |
» | Factory configured - do not alter | JP16 | Open |
Enable 486SX PQFP | JP17 | Open | |
Disable 486SX PQFP | JP17 | Closed | |
Enable 386DX PQFP | JP18 | Open | |
Disable 386DX PQFP | JP18 | 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 |
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 |
PROCESSOR TYPE CONFIGURATION | |||
Type | JP2 | JP6 | JP7 |
Cyrix | Closed | Closed | Closed |
Intel/AMD | Open | Open | Open |
CPU TYPE CONFIGURATION | ||
Type | JP5 | JP12 |
80386 | pins 2 & 3 closed | Closed |
80486 | pins 1 & 2 closed | Open |
CPU CLOCK CONFIGURATION | |||
Type | Speed | JP25 | JP33 |
80386DX | 25MHz | pins 2 & 3 closed | pins 1 & 2 closed |
80386DX | 33MHz | pins 2 & 3 closed | pins 1 & 2 closed |
80486SX | 25MHz | pins 2 & 3 closed | pins 2 & 3 closed |
80486SX | 33MHz | pins 2 & 3 closed | pins 2 & 3 closed |
80486DX | 33MHz | pins 2 & 3 closed | pins 2 & 3 closed |
80486DX | 50MHz | pins 1 & 2 closed | pins 1 & 2 closed |
80486DX2 | 50iMHz | pins 1 & 2 closed | pins 1 & 2 closed |
80486DX2 | 66iMHz | pins 2 & 3 closed | pins 2 & 3 closed |
486 PROCESSOR CONFIGURATION | |||
Type | JP35 | JP36 | JP37 |
80486SX | pins 2 & 3 closed | Open | pins 2 & 3 closed |
80486DX | pins 1 & 2 closed | Closed | pins 1 & 2 closed |
80486DX2 | pins 1 & 2 closed | Closed | pins 1 & 2 closed |
CACHE CONFIGURATION | ||||
Size | Bank 0 | Bank 1 | TAG (U39) | TAG (U40) |
64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 | NONE |
128KB | (4) 32K x 8 | NONE | (1) 8K x 8 | NONE |
256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 8K x 8 | (1) 8K x 8 |
CACHE JUMPER CONFIGURATION | ||||
Size | JP10 | JP11 | JP13 | JP15 |
64KB | pins 2 & 3 closed | Open | Open | Open |
128KB | pins 2 & 3 closed | Closed | Closed | Open |
256KB | pins 1 & 2 closed | Closed | Closed | Closed |
VESA CPU TYPE CONFIGURATION | ||
CPU Type | JP30 | JP34 |
80386 | pins 2 & 3 closed | pins 1 & 2 closed |
80486 | pins 1 & 2 closed | pins 2 & 3 closed |
VESA WAIT STATE CONFIGURATION | |||
CPU speed | Wait states | JP22 | JP26 |
< 33MHz | 0 wait states | Open | Open |
> 33MHz | 1 wait states | Closed | Closed |
MISCELLANEOUS TECHNICAL NOTES |
Note:The VESA bus can be disabled by removing two integrated chips (IC) off the system board. |
To disable the VESA bus, ICs located on U29 and U38 must be removed and the following |
jumpers must be installed: JP8, JP9, JP14, JP19, JP21, JP23, JP24, JP27. |
To enable the VESA bus, insert two ICs at U29 and U38. And all jumpers in above paragraph |
must be open. |
Some system boards may have a clock generating device which must be set to generate the |
proper clock speed for the CPU. Jumpers JP28 and JP29 are used to set the clock frequency |
the device should generate. In most systems, this device is replaced with an oscillator. |