UNIDENTIFIED
LX400A/G
Processor | 80486SX/80487SX/80486DX/80486DX2 |
Processor Speed | 25/33/40/50(internal)/50/66(internal) MHz |
Chip Set | SiS |
Max. Onboard DRAM | 32MB |
Cache | 64/128/256 |
BIOS | AMI |
Dimensions | 230mm x 218mm |
I/O Options | 32-bit VESA local bus slots (2), PS/2 mouse port |
NPU Options | None |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Flash LED connector | FLASH | Power LED & keylock | J7 |
Turbo LED | J3 | PS/2 mouse connector | J11 |
Turbo switch | J4 | Standby output connector | J28 |
Speaker | J5 | 32-bit VESA Local bus slot | S1 |
Reset switch | J6 | 32-bit VESA Local bus slot | S2 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | Factory configured do not alter | JP1 | Open |
» | Monitor type select color | JP2 | Closed |
Monitor type select monochrome | JP2 | Open | |
» | Factory configured do not alter | JP10 | N/A |
» | Factory configured do not alter | JP11 | N/A |
PS/2 mouse interrupt | JP12 | pins 1 & 2 closed | |
PS/2 mouse set at AT Bus IRQ12 | JP12 | pins 2 & 3 closed | |
» | Factory configured do not alter | JP13 | N/A |
» | Factory configured do not alter | JP14 | N/A |
» | Factory configured do not alter | JP21 | N/A |
» | Factory configured do not alter | JP22 | N/A |
» | Factory configured do not alter | JP23 | N/A |
» | Power saving mode switch off | STDBY | Open |
Power saving mode switch on | STDBY | 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 |
8MB | (4) 1M x 9 | (4) 1M x 9 |
16MB | (4) 4MB x 9 | (4) 4MB x 9 |
20MB | (4) 1MB x9 | (4) 4MB x 9 |
32MB | (4) 4MB x 9 | (4) 4MB x 9 |
CACHE JUMPER CONFIGURATION | |||||
Size | SR1 | SR2 | SR3 | SR4 | SR5 |
64KB | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
128KB | pins 1 & 2 | pins 1 & 2 | pins 2 & 3 | pins 2 & 3 | pins 1 & 2 |
256KB | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 |
Note:Pins designated are in the closed position. |
CACHE CONFIGURATION | |||
Size | Bank 0 | Bank 1 | TAG |
64 KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 |
128 KB | (4) 32K x 8 | NONE | (1) 8K x 8 |
256 KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 |
CPU TYPE CONFIGURATION | |||
CPU Type | JP6 | JP7 | JP8 |
80486SX | Open | Open | pins 2 & 3 closed |
80487SX | Closed | pins 2 & 3 closed | pins 1 & 2 closed |
80486DX | Closed | pins 1 & 2 closed | pins 1 & 2 closed |
CPU SPEED CONFIGURATION | |||
CPU speed | S0 | S1 | S2 |
25 MHz | Closed | Open | Open |
33 MHz | Closed | Closed | Closed |
40 MHz | Closed | Closed | Closed |
50 MHz | Open | Open | Closed |
50iMHz | Closed | Open | Open |
60iMHz | Closed | Closed | Closed |
Note:The location on the system board of the above jumpers is unidentified. |
VESA WAIT STATE/BUS SPEED CONFIGURATION | |||
CPU Speed | Wait states | JP24, JP26 | JP25, JP27 |
< 33MHz | 0 wait states | pins 1 & 2 closed | pins 1 & 2 closed |
> 33MHz | 1 wait state | pins 2 & 3 closed | pins 2 & 3 closed |
MISCELLANEOUS TECHNICAL NOTE |
Note:Some of the SR jumpers may be hard-wired by the manufacturer, thus some of the cache options may not be available. |