AIM MOTHERBOARD COMPANY
AIM486CQ
Processor | 80486SX/80487SX/80486DX |
Processor Speed | 20/25/33/50MHz |
Chip Set | VLSI |
Max. onboard DRAM | 32MB |
Cache | 64/128/256KB |
BIOS | AMI |
Dimensions | 330mm x 218mm |
I/O Options | None |
NPU Options | 4167 |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
External battery | JP5 | Reset switch | JP32 |
Turbo switch | JP30 | Speaker | JP33 |
Turbo LED | JP31 | Power LED & keylock | JP34 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper/Switch | Position | |
» | Monitor type select color | JP1 | Closed |
Monitor type select monochrome | JP1 | Open | |
» | CMOS memory normal operation | JP6 | pins 1 & 2 closed |
CMOS memory clear | JP6 | pins 2 & 3 closed | |
» | NPU select 0 wait states | JP18 | Open |
NPU select 1 wait state | 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 |
32MB | (4) 4M x 9 | (4) 4M x 9 |
CACHE CONFIGURATION | |||
Size | Bank 0 | Bank 1 | TAG |
64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 4 |
128KB | (4) 32K x 8 | NONE | (1) 8K x 4 |
256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 4 |
CACHE JUMPER CONFIGURATION | ||||||
Size | JP11 | JP12 | JP13 | JP14 | JP40 | JP41 |
64KB | Open | Open | Open | Open | Open | pins 2 & 3 |
128KB | Open | pins 1 & 2 | pins 2 & 3 | Closed | Open | pins 1 & 2 |
256KB | Closed | pins 1 & 2 | pins 1 & 2 | Closed | Closed | pins 2 & 3 |
Note:Pins designated should be in the closed position. |
CPU SPEED CONFIGURATION | |||
Speed | JP15 | JP22 | JP23 |
20MHz | pins 2 & 3 closed | Open | Open |
25MHz | pins 1 & 2 closed | Closed | Open |
33MHz | pins 1 & 2 closed | Open | Closed |
50MHz | pins 1 & 2 closed | Closed | Closed |
CPU TYPE CONFIGURATION | ||||
TYPE | JP2 | JP3 | JP7 | JP8 |
80486SX | Open | pins 2 & 3 closed | Open | Closed |
80487SX | pins 1 & 2 closed | pins 1 & 2 closed | Closed | Open |
80486DX | pins 2 & 3 closed | pins 2 & 3 closed | Open | Closed |