LS-486E Motherboard User Guide
- June 3, 2024
- Motherboard
Table of Contents
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 |
| --- | --- |
| IRQ 5 | 1-2 |
| IRQ 3 | 2-3 |
| DRQ 1 | – |
| DRQ 3 | – |
| DACK 1 | – |
| DACK 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 |
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