STEP 286 Motherboard Settings and Configuration
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 |
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