Packard Bell 386 16/20 Supreme M/Board
Both versions of this mother board are shown below. The first motherboard is the new motherboard layout (386-16 & 386-20), and the second board is the old motherboard layout (386-16).
Jumpers
| Function | Jumper | Description |
|---|---|---|
| Display Type (JMP1) | 1-2 2-3 | Colour Monochrome |
| Coprocessor (JMP2 old version) | 1-2 2-3 | Disabled Enabled |
| Coprocessor (JMP2 new version) | 1-2 3-4 5-6 | 80387 None 80287 |
| EMPROM (JMP 3 new version) | 1-2 2-3 | 256k 512k |
| Auxiliary IOCS16 (JMP 4 old version) | 1-2 2-3 | Enabled Disabled |
Upgrades
- Battery : Removable, located at J2.
- Maths Co-Processor : This system has two variations of motherboards: A. The old variation accepts only the 80287-10 Math Co-processor at location U12. B. The new variation will accept the 80287-10, 80387DX-16 or 80387DX-20 in the appropriate Co-processor socket. JMP2 must jump 1-2 for 80387 or 5-6 for 80287.
- RAM : 16MB maximum. Shadow BIOS and Shadow Video takes 128Kb off Extended Memory for each enabled shadow. No jumper setting required. Use 256l or 1MB SIMMS, 70ns.
Adding RAM is the most cost effective way to boost your computer's performance.