JPN CORPORATION
MB386SX
| Processor | 80386SX | 
| Processor Speed | 16/20/25MHz | 
| Chip Set | VLSI | 
| Max. Onboard DRAM | 4MB | 
| Cache | None | 
| BIOS | AMI | 
| Dimensions | 220mm x 220mm | 
| I/O Options | None | 
| NPU Options | 80387SX | 
 
| CONNECTIONS | |||
| Purpose | Location | Purpose | Location | 
| Speaker | JP20 | Turbo switch | JP52 | 
| Power LED & keylock | JP30 | Turbo LED | JP56 | 
| Reset switch | JP51 | ||
| USER CONFIGURABLE SETTINGS | |||
| Function | Jumper | Position | |
| » | Pipeline mode enabled | JP10 | closed | 
| Pipeline mode disabled | JP10 | open | |
| » | BIOS type select 27256 | JP23 JP24 | open closed | 
| BIOS type select 27128 | JP23 JP24 | open open | |
| BIOS type select 27512 | JP23 JP24 | closed closed | |
| » | Parity check enabled | JP25 | closed | 
| Parity check disabled | JP25 | open | |
| » | Monitor type select color | JP31 | closed | 
| Monitor type select monochrome | JP31 | open | |
| » | Power good signal detect from board | JP55 | pins 1 & 2 closed | 
| Power good signal detect from power supply | JP55 | pins 2 & 3 closed | |
| » | CMOS memory normal operation | JP58 | pins 1 & 2 closed | 
| CMOS memory clear | JP58 | pins 3 & 4 closed | |
| » | Factory configured - do not alter | JP59 | N/A | 
| DRAM CONFIGURATION | ||||||
| Size | Bank 0 | Parity (P-0) | Bank 1 | Parity (P-1) | Bank 2 | Bank 3 | 
| 512KB | (4) 44256 | (2) 41256 | NONE | NONE | NONE | NONE | 
| 1MB | (4) 44256 | (2) 41256 | (4) 44256 | (2) 41256 | NONE | NONE | 
| 1.5MB | (4) 44256 | (2) 41256 | (4) 44256 | (2) 41256 | (2) 256K x 9 | NONE | 
| 2MB | (4) 44256 | (2) 41256 | (4) 44256 | (2) 41256 | (2) 256K x 9 | (2) 256K x 9 | 
| 2MB | NONE | NONE | NONE | NONE | (2) 1M x 9 | NONE | 
| 3MB | (4) 44256 | (2) 41256 | (4) 44256 | (2) 41256 | (2) 1M x 9 | NONE | 
| 4MB | NONE | NONE | NONE | NONE | (2) 1M x 9 | (2) 1M x 9 |