EVEREX SYSTEMS, INC.
STEP 286/20 (EV-1820)
| 
 Processor  | 
 80286  | 
| 
 Processor Speed  | 
 20MHz  | 
| 
 Chip Set  | 
 Everex  | 
| 
 Max. Onboard DRAM  | 
 4MB  | 
| 
 SRAM Cache  | 
 32/64/128KB  | 
| 
 BIOS  | 
 Everex  | 
| 
 Dimensions  | 
 330mm x 218mm  | 
| 
 I/O Options  | 
 32-bit external memory card slot  | 
| 
 NPU Options  | 
 80287  | 
| 
 CONNECTIONS  | |||
| 
 Purpose  | 
 Location  | 
 Purpose  | 
 Location  | 
| 
 External memory card slot  | 
 S1  | ||
| 
 DRAM CONFIGURATION  | ||||
| 
 Size  | 
 Bank 0  | 
 Bank 1  | 
 Bank 2  | 
 Bank 3  | 
| 
 512KB  | 
 (18) 41256  | 
 NONE  | 
 NONE  | 
 NONE  | 
| 
 1MB  | 
 (18) 41256  | 
 (18) 41256  | 
 NONE  | 
 NONE  | 
| 
 2MB  | 
 (18) 41256  | 
 (18) 41256  | 
 (18) 41256  | 
 (18) 41256  | 
| 
 2MB  | 
 (18) 411000  | 
 NONE  | 
 NONE  | 
 NONE  | 
| 
 4MB  | 
 (18) 411000  | 
 (18) 411000  | 
 NONE  | 
 NONE  | 
| 
 8MB  | 
 (18) 411000  | 
 (18) 411000  | 
 (18) 411000  | 
 (18) 411000  | 
| 
 Note:Banks 2 and 3 are utilized when a 32-bit external memory card is installed at S1.  | ||||
| 
 SRAM CONFIGURATION  | ||
| 
 Size  | 
 Cache SRAM  | 
 Location  | 
| 
 32KB  | 
 (4) 8K x 8  | 
 Bank 0  | 
| 
 64KB  | 
 (8) 8K x 8  | 
 Banks 0 & 1  | 
| 
 128KB  | 
 (4) 32K x 8  | 
 Bank 0  |