AIM MOTHERBOARD COMPANY
486 VESA
Processor | 80486SX/80487SX/80486DX/80486DX2 |
Processor Speed | 20/25/33/50(internal)/50/66(internal)MHz |
Chip Set | UNI |
Max. Onboard DRAM | 128MB |
Cache | 32/64/128/256KB |
BIOS | AMI |
Dimensions | 254mm x 218mm |
I/O Options | 32-bit VESA local bus slots (3) |
NPU Options | None |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
External battery | J4 | Turbo switch | JP17 |
Power LED & keylock | J5 | 32-bit VESA Local bus slots | S1 |
Speaker | J6 | 32-bit VESA Local bus slots | S2 |
Reset switch | JP18 | 32-bit VESA Local bus slots | S3 |
Turbo LED | JP16 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | Monitor type select color | JP1 | Closed |
Monitor type select monochrome | JP1 | Open | |
» | CMOS memory normal operation | JP2 | pins 1 & 2 closed |
CMOS memory clear | JP2 | pins 2 & 3 closed | |
» | Factory configured - do not alter | JP20 | Closed |
» | V-L bus clock select - normal | JP43 | pins 2 & 3 closed |
V-L bus clock select - adjusted | JP43 | 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) 1M x 9 | (4) 256K x 9 |
8MB | (4) 1M x 9 | (4) 1M x 9 |
16MB | (4) 4M x 9 | NONE |
17MB | (4) 4M x 9 | (4) 256K 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 |
65MB | (4) 16M x 9 | (4) 256K x 9 |
68MB | (4) 16M x 9 | (4) 4M x 9 |
80MB | (4) 16M x 9 | (4) 4M x 9 |
128MB | (4) 16M x 9 | (4) 16M x 9 |
CPU TYPE CONFIGURATION | |||
Type | JP4 | JP19 | JP44 |
80486SX | pins 5 & 6 closed | Open | pins 2 & 3 closed |
80487SX | pins 2 & 3, 4 & 5, 6 & 7 closed | Open | pins 2 & 3 closed |
80486DX/33 | pins 1 & 2, 4 & 5, 6 & 7 closed | Open | pins 2 & 3 closed |
80486DX/50 | pins 1 & 2, 4 & 5, 6 & 7 closed | Closed | pins 1 & 2 closed |
80486DX2 | pins 1 & 2, 4 & 5, 6 & 7 closed | Open | pins 2 & 3 closed |
CPU SPEED CONFIGURATION | |||
Speed | JP29 | JP30 | JP31 |
20MHz | Open | Closed | Closed |
25Mhz | Closed | Open | Closed |
33MHz | Closed | Closed | Open |
50i MHz | Open | Closed | Open |
50MHz | Closed | Open | Closed |
66i MHz | Closed | Closed | Open |
CACHE JUMPER CONFIGURATION | ||||
Size | JP6 | JP7 | JP9 | JP11 |
32KB | Open | Open | Open | pins 2 & 3 closed |
64KB | Open | Closed | Open | pins 1 & 2 closed |
128KB | Open | Closed | Closed | pins 1 & 2 and 3 & 4 closed |
256KB | Closed | Closed | Closed | pins 1 & 2 and 4 & 5 closed |
VESA CONFIGURATION | |||
Setting | JP40 | JP41 | JP42 |
V-L bus master | Open | Open | Open |
V-L bus slave | Closed | Closed | Closed |