STEP 486 Motherboard Settings and Configuration
EVEREX SYSTEMS, INC.
STEP 486
Processor | 80486SX |
Processor Speed | 25/33MHz |
Chip Set | Unidentified |
Video Chip Set | None |
Maximum Onboard Memory | 32MB (on external memory card) |
Maximum Video Memory | None |
Cache | Unidentified |
BIOS | Unidentified |
Dimensions | 355mm x 304mm |
I/O Options | External memory card, parallel port, serial ports (2) |
NPU Options | 4167 |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Parallel port | CN1 | Serial port 2 | CN3 |
Serial port 1 | CN2 | External memory card | SL1 |
USER CONFIGURABLE SETTINGS | |||
Function | Label | Position | |
» | Factory configured - do not alter | JP3 | Open |
» | Factory configured - do not alter | JP4 | Pins 2 & 3 closed |
» | Factory configured - do not alter | JP6 | Open |
» | Factory configured - do not alter | JP10 | Open |
» | Factory configured - do not alter | JP11 | Open |
» | Factory configured - do not alter | JP12 | Open |
CACHE CONFIGURATION |
Note: The size of the cache is unidentified. |
SERIAL PORT INTERRUPT SELECTION | ||
IRQ | J2 | J3 |
IRQ3 | Pins 3 & 4 closed | Pins 3 & 4 closed |
IRQ4 | Pins 5 & 6 closed | Pins 5 & 6 closed |
IRQ5 | Pins 7 & 8 closed | Pins 7 & 8 closed |
IRQ9 | Pins 1 & 2 closed | Pins 1 & 2 closed |
Note: Port 1 interrupts are set by one jumper and Port 2 interrupts are set by the other jumper. The correspondence between ports and jumpers is unidentified. | ||
PARALLEL PORT INTERRUPT SELECTION | |
IRQ | J1 |
IRQ5 | Pins 3 & 4 closed |
IRQ7 | Pins 5 & 6 closed |
IRQ9 | Pins 1 & 2 closed |
DRAM CONFIGURATION | ||||
Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
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 |
8MB | (4) 1M x 9 | (4) 1M x 9 | None | 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 |
32MB | (4) 4M x 9 | (4) 4M x 9 | None | None |
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