SPRING CIRCLE COMPUTER, INC.
MDX340C/FOREX386
| Processor | 80386DX | 
| Processor Speed | 33/40MHz | 
| Chip Set | Forex | 
| Max. Onboard DRAM | 32MB | 
| Cache | 32/64/128KB | 
| BIOS | AMI | 
| Dimensions | 330mm x 218mm | 
| I/O Options | 32-bit external memory card slot | 
| NPU Options | 80387/3167 | 
 
| CONNECTIONS | |||
| Purpose | Location | Purpose | Location | 
| External battery | JP2 | Speaker | JP10 | 
| Turbo LED | JP7 | Turbo switch | JP11 | 
| Reset switch | JP8 | 32-bit external memory card | S1 | 
| Power LED & keylock | JP9 | ||
| USER CONFIGURABLE SETTINGS | |||
| Function | Jumper | Position | |
| » | Monitor type select color | JP3 | Open | 
| Monitor type select monochrome | JP3 | Closed | |
| » | NPU mode select synchronous with CPU | JP5 | pins 1 & 2 closed | 
| NPU mode select synchronous with oscillator installed at Y1 | JP5 | pins 2 & 3 closed | |
| » | Factory configured - do not alter | JP6 | N/A | 
| » | External battery select 6.0VDC | JP200 | Open | 
| External battery select 3.6VDC | JP200 | Closed | |
| » | CMOS memory normal operation | JP202 | Open | 
| CMOS memory clear | JP202 | Closed | |
| DRAM CONFIGURATION | ||||
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 | 
| 1MB | (4) 256K x 9 | NONE | NONE | NONE | 
| 2MB | (4) 256K x 9 | (4) 256K x 9 | NONE | NONE | 
| 4MB | (4) 1M x 9 | NONE | NONE | NONE | 
| 5MB | (4) 256K x 9 | (4) 1M x 9 | NONE | NONE | 
| 6MB | (4) 256K x 9 | (4) 256K x 9 | (4) 1M x 9 | NONE | 
| 8MB | (4) 1M x 9 | (4) 1M x 9 | NONE | NONE | 
| 9MB | (4) 256K x 9 | (4) 1M x 9 | (4) 1M x 9 | NONE | 
| 12MB | (4) 1M x 9 | (4) 1M x 9 | (4) 1M x 9 | 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 | 
| 20MB | (4) 1M x 9 | (4) 4M x 9 | NONE | NONE | 
| 24MB | (4) 1M x 9 | (4) 1M x 9 | (4) 4M x 9 | NONE | 
| 32MB | (4) 4M x 9 | (4) 4M x 9 | NONE | NONE | 
| 36MB | (4) 1M x 9 | (4) 4M x 9 | (4) 4M x 9 | NONE | 
| 48MB | (4) 4M x 9 | (4) 4M x 9 | (4) 4M x 9 | NONE | 
| 64MB | (4) 4M x 9 | (4) 4M x 9 | (4) 4M x 9 | (4) 4M x 9 | 
| Note:Banks 2 & 3 are used when a 32-bit external memory card is installed. | ||||
| CACHE CONFIGURATION | ||||
| Size | Bank 0 | Bank 1 | Tag (U15) | Tag (U16) | 
| 32KB | (4) 8K x 8 | NONE | (1) 8K x 8 | NONE | 
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (1) 8K x 8 | (1) 8K x 8 | 
| 128KB | (4) 32K x 8 | NONE | (1) 32K x 8 | NONE | 
| CACHE JUMPER CONFIGURATION | |
| Size | JP6 | 
| 32KB | pins 1 & 2 closed | 
| 64KB | pins 2 & 3 closed | 
| 128KB | pins 2 & 3 closed |