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.