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 |