ELITEGROUP COMPUTER SYSTEMS, INC.
486U (REV. 1.1C)
|
Processor |
80486SX/80487SX/80486DX |
|
Processor Speed |
20/25/33/40/50MHz |
|
Chip Set |
UMC |
|
Video Chip Set |
None |
|
Maximum Onboard Memory |
64MB (32MB on external memory card) |
|
Maximum Video Memory |
None |
|
Cache |
64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
330mm x 220mm |
|
I/O Options |
External memory card |
|
NPU Options |
4167 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Power LED & keylock |
J1 |
External battery |
J7 |
|
Speaker |
J2 |
Turbo LED |
W1 pins 2 & 3 |
|
Turbo switch |
J4 |
Reset switch |
W14 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Label |
Position | |
|
Turbo mode enabled |
J4 |
Pins 1 & 2 closed | |
|
Turbo mode disabled |
J4 |
Open | |
|
|
Factory configured - do not alter |
J5 |
Pins 1 & 2 closed |
|
|
Factory configured - do not alter |
W2 |
Open |
|
|
Factory configured - do not alter |
W5 |
Pins 1 & 2 closed |
|
|
Factory configured - do not alter |
W11 |
Open |
|
DRAM CONFIGURATION | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
1MB |
(4) 256K x 9 |
None |
None |
None |
|
2MB |
(4) 256K x 9 |
(4) 256K x 9 |
None |
None |
|
3MB |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 256K x 9 |
None |
|
4MB |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 256K x 9 |
|
4MB |
(4) 1M x 9 |
None |
None |
None |
|
5MB |
(4) 256K x 9 |
(4) 1M x 9 |
None |
None |
|
6MB |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 1M x 9 |
None |
|
8MB |
(4) 1M x 9 |
(4) 1M x 9 |
None |
None |
|
9MB |
(4) 256K x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
None |
|
10MB |
(4) 256K x 9 |
(4) 256K x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
|
12MB |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
None |
|
16MB |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 1M x 9 |
|
16MB |
(4) 4M x 9 |
None |
None |
None |
|
20MB |
(4) 1M x 9 |
(4) 4M x 9 |
None |
None |
|
24MB |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 4M x 9 |
None |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
None |
None |
|
36MB |
(4) 1M x 9 |
(4) 4M x 9 |
(4) 4M x 9 |
None |
|
40MB |
(4) 1M x 9 |
(4) 1M x 9 |
(4) 4M x 9 |
(4) 4M x 9 |
|
48MB |
(4) 4M x 9 |
(4) 4M x 9 |
(4) 4M x 9 |
None |
|
64MB |
(4) 4M x 9 |
(4) 4M x 9 |
(4) 4M x 9 |
(4) 4M x 9 |
|
Note: Banks 2 & 3 are located on the external memory card. | ||||
|
CACHE CONFIGURATION | ||
|
Size |
Bank 0 |
Bank 1 |
|
64KB |
(4) 8K x 8 |
(4) 8K x 8 |
|
128KB |
(4) 32K x 8 |
None |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
|
CACHE JUMPER CONFIGURATION | |||||
|
Size |
W6 |
W8 |
W9 |
W12 |
W13 |
|
None |
Open |
Open |
Open |
Open |
Open |
|
64KB |
1 & 2 |
1 & 2 |
2 & 3 |
1 & 2 |
1 & 2 |
|
128KB |
1 & 2 |
2 & 3 |
2 & 3 |
2 & 3 |
1 & 2 |
|
256KB |
2 & 3 |
2 & 3 |
2 & 3 |
1 & 2 |
2 & 3 |
|
Note: Pins designated should be in the closed position. | |||||
|
CACHE TAG CONFIGURATION | ||||
|
Size |
U2 |
U3 |
U4 |
U5 |
|
64KB |
(1) 16K x 4 |
(1) 16K x 4 |
(1) 16K x 4 |
(1) 16K x 4 |
|
128KB |
(1) 16K x 4 |
(1) 16K x 4 |
(1) 16K x 4 |
(1) 16K x 4 |
|
256KB |
(1) 16K x 4 |
(1) 16K x 4 |
(1) 16K x 4 |
(1) 16K x 4 |
|
Note: U4 & U5 must be installed even if no cache is installed. | ||||
|
CACHE TAG JUMPER CONFIGURATION | |
|
Size |
W7 |
|
No cache installed |
Closed |
|
Chip installed at U3 |
Open |
|
Chip not installed at U3 |
Closed |
|
CPU TYPE SELECTION | |||||
|
Type |
J3 |
W3 |
W4 |
W10 |
W15 |
|
80486SX |
Open |
2 & 3 |
Open |
Open |
Open |
|
80487SX |
2 & 3 |
1 & 2 |
Closed |
Closed |
Open |
|
80486DX |
1 & 2 |
1 & 2 |
Closed |
Open |
Open |
|
Note: Pins designated should be in the closed position. | |||||