EVEREX SYSTEMS, INC.
STEP 286
|
Processor |
80286 |
|
Processor Speed |
12/16MHz |
|
Chip Set |
C & T |
|
Max. Onboard DRAM |
4MB |
|
Cache |
None |
|
BIOS |
AMI |
|
Dimensions |
246mm x 216mm |
|
I/O Options |
None |
|
NPU Options |
80287 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Turbo LED |
P1 |
Speaker |
P4 |
|
Turbo Switch |
P2 |
Power LED & Keylock |
P5 |
|
Reset switch |
P3 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper |
Position | |
|
Monitor type select monochrome |
SW3 |
Closed | |
|
Monitor type select color |
SW3 |
Open | |
|
DRAM access time 100ns |
W2 |
Closed | |
|
DRAM access time 70ns |
W2 |
Open | |
|
CPU select 0 wait states |
W3 |
Closed | |
|
CPU select 1 wait state |
W3 |
Open | |
|
Factory configured - do not alter |
W4 - W11 |
N/A | |
|
DRAM access time 80ns |
W15 |
closed | |
|
DRAM access time 60ns to 70ns |
W15 |
open | |
|
Note:On 12MHz board W2 controls DRAM access time and W15 must remain closed. On 16MHz board W15 controls DRAM access time and W2 must remain open. | |||
|
DRAM CONFIGURATION | ||
|
Size |
Bank 0 |
Bank 1 |
|
512KB |
(18) 41256 |
NONE |
|
1MB |
(18) 41256 |
(18) 41256 |
|
2MB |
(18) 411000 |
NONE |
|
2.5MB |
(18) 411000 |
(18) 41256 |
|
4MB |
(18) 411000 |
(18) 411000 |
|
DRAM SWITCH CONFIGURATION | |||
|
Size |
SW2/2 |
SW2/3 |
SW2/4 |
|
512KB |
On |
On |
On |
|
1MB |
On |
On |
Off |
|
2MB |
Off |
On |
On |
|
2.5MB |
On |
Off |
On |
|
4MB |
On |
On |
On |
|
NPU SPEED CONFIGURATION | ||
|
Speed |
W12 |
W13 |
|
5MHz or disabled |
pins 2 & 3, 5 & 6 closed |
pins 2 & 3, 5 & 6 closed |
|
8 or 10MHz |
pins 1 & 2, 4 & 5 closed |
pins 1 & 2, 4 & 5 closed |