LS-486E Motherboard
Lucky Star LS-486E rev
D jumper settings
Note: jumpers marked with yellow might be hard wired on some boards
Connectors list
- J3 external battery
- CN2 Primary IDE
- J5 COM1
- Special jumpers:
- CN1 Secondary IDE
- J4 COM2
- JP17: -> 1-2 for AMD DX4-100
- JP4 Floppy
- JP6 Primary IDE LED
- -> 2-3 for 3.3V AMD DX2
- CN7 Parallel
- JP7 Secondary IDE LED
- -> OFF for any other CPU
JP8 and W3’s functions are unknown and their default position is 1-2
CPU settings
| CPU voltage: | W4 | JP28 |
| 3.45 volts (5×86/DX4) | Open | 1-2 |
| 4.0 volts (Cyrix DX2) | Open | 2-3 |
| 5.0 volts (Intel DX/DX2) | Closed | Open |
| FSB speed: | JP5 |
| 25MHz | All Open |
| 33MHz | 1-2, 3-4 |
| 40MHz | 1-2 |
| 50MHz | 3-4 |
Clock chip used: IMI SC464AYB
| CPU type: | Intel SLE DX/DX2/DX4 | AMD/UMC DX/DX2/DX4 | Intel 486SX | Cyrix DX2 | P24D | P24T |
| JP10 | Open | Open | Open | Open | 1-2 | Open |
| JP11 | Open | Open | Open | 2-3 | 1-2 | 1-2 |
| JP12 | 2-3 | 2-3 | 2-3 | 2-3 | 1-2 | 1-2 |
| JP13 | 4-5 | Open | Open | 2-3 | 4-5 | 1-2 |
| JP14 | 1-2 | Open | Open | Open | 2-3 | Open |
| JP15 | 2-3 | Open | Open | 1-2 | 2-3 | 2-3 |
| JP16 | Open | Open | Open | Open | Open | 1-2 |
| JP18 | 1-2 | Open | Open | 1-2 | 1-2 | 1-2 |
| JP19 | Open | Open | Open | Closed | Open | Open |
| JP20 | 3-4 | 3-4 | 3-4 | 3-4 | 3-4 | 2-3 |
| JP21 | Open | Open | Open | 2-3 | Open | 1-2 |
| JP23 | 3-4 | Open | Open | 2-3 | 1-2, 3-4 | 3-4 |
| JP24 | 1-2, 3-4 | 1-2, 3-4 | 2-3 | 1-2, 3-4 | 1-2, 3-4 | 1-2, 3-4 |
Cache settings:
| Cache bank size: | JP25 | JP27 |
| 128KB (four 32K x 8 chips) | 1-2 | 2-3 |
| 256KB (four 64K x 8 chips) | 2-3 | 2-3 |
| 512KB (four 128K x 8 chips) | 2-3 | 1-2 |
| Cache TAG chip size: | JP26 |
| 8K x 8/32K x 8 | 1-2 |
| 16K x 8 | 2-3 |
Other settings
| CMOS operation: | JP2, JP3 |
| Normal | 1-2 |
| Clear | 2-3 |
| Monitor type: | JP1 |
| Mono | Closed |
| Color | Open |
| LPT resources: | S1 | S2 | S3 |
| IRQ 5 | 1-2 | – | – |
| IRQ 3 | 2-3 | – | – |
| DRQ 1 | – | 1-2 | – |
| DRQ 3 | – | 2-3 | – |
| DACK 1 | – | – | 1-2 |
| DACK 3 | – | – | 2-3 |
Memory configs
| Total memory: | SIMM 1 | SIMM 2 | SIMM 3 | SIMM 4 |
| 4 MB | 4 MB | — | — | — |
| 8 MB | 4 MB | 4 MB | — | — |
| 8 MB | 8 MB | — | — | — |
| 12 MB | 4 MB | 4 MB | 4 MB | — |
| 12 MB | 4 MB | 8 MB | — | — |
| 16 MB | 4 MB | 4 MB | 4 MB | 4 MB |
| 16 MB | 8 MB | 8 MB | — | — |
| 16 MB | 16 MB | 16 MB | — | — |
| 20 MB | 4 MB | 16 MB | — | — |
| 24 MB | 8 MB | 8 MB | — | — |
| 32 MB | 8 MB | 8 MB | 8 MB | 8 MB |
| 32 MB | 16 MB | 16 MB | — | — |
| 64 MB | 16 MB | 16 MB | 16 MB | 16 MB |
| 128 MB | 32 MB | 32 MB | 32 MB | 32 MB |
