486 LX VESA LOCAL BUS WINSTATION Motherboard Settings and Configuration
AUSTIN COMPUTER SYSTEMS
486 LX VESA LOCAL BUS WINSTATION
Processor | 80486SX/80487SX/80486DX/80486DX2 |
Processor Speed | 25/33/50(Internal)/50/66(Internal)MHz |
Chip Set | SIS |
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 | None |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Turbo LED | J3 | Reset switch | J6 |
Turbo switch | J4 | Power LED & keylock | J7 |
Speaker | J5 | 32-bit VESA local bus slots | S1 & S2 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper/Switch | 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 | JP9 | Pins 1 & 2 closed |
» | Factory configured do not alter | JP14 | Pins 1 & 2 closed |
» | Factory configured do not alter | JP15 | Open |
» | Factory configured do not alter | JP16 | Open |
» | Factory configured do not alter | JP24 | Pins 2 & 3 open |
» | Factory configured do not alter | JP25 | Pins 1 & 2 open |
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) 4M x 9 | NONE |
20MB | (4) 1M x 9 | (4) 4M x 9 |
32MB | (4) 4M x 9 | (4) 4M x 9 |
CACHE CONFIGURATION | |||
Size | Cache | Location | TAG |
64KB | (8) 8K x 8 | Banks 0 & 1 | (1) 8K x 8 |
128KB | (4) 32K x 8 | Bank 0 | (1) 8K x 8 |
256KB | (8) 32K x 8 | Banks 0 & 1 | (1) 32K x 8 |
CACHE JUMPER CONFIGURATION | ||||||
Size | SR1 | SR2 | SR3 | SR4 | SR5 | SR6 |
64KB | Pins 2 & 3 | Pins 2 & 3 | Pins 1 & 2 | Pins 2 & 3 | Pins 1 & 2 | Pins 1 & 2 |
128KB | Pins 1 & 2 | Pins 1 & 2 | Pins 2 & 3 | 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 | Pins 2 & 3 |
NotePins designated should be in the closed position. | ||||||
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 |
80486DX2 | Closed | Pins 1 & 2 closed | Pins 1 & 2 closed |
CPU SPEED CONFIGURATION | ||||
Speed | JP10 | JP11 | JP12 | JP13 |
25MHz | Pins 2 & 3 | Pins 2 & 3 | Pins 1 & 2 | Pins 1 & 2 |
33MHz | Pins 1 & 2 | Pins 2 & 3 | Pins 1 & 2 | Pins 1 & 2 |
50iMHz | Pins 2 & 3 | Pins 2 & 3 | Pins 1 & 2 | Pins 1 & 2 |
50MHz | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |
66iMHz | Pins 1 & 2 | Pins 2 & 3 | Pins 1 & 2 | Pins 1 & 2 |
NotePins designated should be in the closed position. | ||||
VESA CPU TYPE (ID0 & ID1) CONFIGURATION | ||
CPU TYPE | JP24 (ID0) | JP25 (ID1) |
80386 | Pins 2 & 3 closed | Pins 1 & 2 closed |
80486 | Pins 2 & 3 closed | Pins 1 & 2 closed |
VESA WAIT STATE (ID2) CONFIGURATION | ||
Wait states | CPU Speed | JP26 |
0 wait states | £ 33MHz | Pins 1 & 2 closed |
1 wait state | > 33MHz | Pins 2 & 3 closed |
VESA WAIT STATE (ID2) CONFIGURATION | |
CPU Speed | JP27 |
<= 33MHz | Pins 1 & 2 closed |
> 33MHz | Pins 2 & 3 closed |
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