UNIDENTIFIED
486-VESA
|
Processor |
CX486S/80486SX/80486DX/80486DX2 |
|
Processor Speed |
20/25/33/40/50 (internal)/50MHz |
|
Chip Set |
PC Chips |
|
Max. Onboard DRAM |
32MB |
|
Cache |
64/128/256KB |
|
BIOS |
AMI |
|
Dimensions |
250mm x 220mm |
|
I/O Options |
32-bit VESA local bus slots (2) |
|
NPU Options |
4167 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
External battery |
J1 |
Turbo LED |
J23 |
|
Turbo switch |
J3 |
Power LED & keylock |
J24 |
|
Speaker |
J21 |
Weitek daughtercard connector |
W1 |
|
Reset switch |
J22 |
32-bit VESA local bus slots |
SL1 & SL2 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
|
Monitor type select color |
J2 |
Closed |
|
Monitor type select monochrome |
J2 |
Open | |
|
|
Fast gate A20 mode enabled |
J13 |
pins 1 & 2 closed |
|
Fast gate A20 mode disabled |
J13 |
pins 2 & 3 closed | |
|
|
Factory configured - do not alter |
J25 |
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) 4M x 9 |
(4) 1M x 9 |
|
20MB |
(4) 1M x 9 |
(4) 4M x 9 |
|
32MB |
(4) 4M x 9 |
(4) 4M x 9 |
|
CPU TYPE CONFIGURATION | |||
|
Setting |
J18 |
J19 |
J20 |
|
CX486S2 |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
80486SX |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
80486DX |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2, 3 & 4 closed |
|
80486DX2 |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2, 3 & 4 closed |
|
CACHE CONFIGURATION | |||
|
Size |
Bank 0 |
Bank 1 |
TAG |
|
64KB |
(4) 8K x 8 |
(4) 8K x 8 |
(1) 8K x 8 |
|
128KB |
(4) 32K x 8 |
NONE |
(1) 8K x 8 |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(1) 32K x 8 |
|
CACHE JUMPER CONFIGURATION | |||
|
Size |
J4 |
J5 |
J6 |
|
64KB |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
128KB |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
256KB |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
CACHE WRITE MODE CONFIGURATION | ||||
|
Mode |
Size |
J15 |
J16 |
J17 |
|
Write-through |
Any |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
Write-back |
64KB |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
Write-back |
128KB |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
Write-back |
256KB |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
VESA WAIT STATE CONFIGURATION | ||
|
Wait states |
J12 |
J26 |
|
0 wait states |
pins 2 & 3 closed |
Open |
|
1 wait state |
pins 1 & 2 closed |
Closed |