Search \ VOGONS

Login

Login

Username

Password

2FA token (optional)

Remember me

Hide my online status this session

Lost password
Send activation email

or Create a new account
Create a new account

Common searches

Active topics

Search results

Display options

Re: LuckyStar LS-486e Rev:D Hardware Upgrade Guide

Posted on 2022-01-21, 11:55

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

both 2.2 uH or 470 uH inductors are functional for PS/2 mice on this board. The problem I had was with AMIKEY-2 - PS/2 mouse wouldn't function with it, but Holtek HT6542B and VIA VT82C42N both worked fine. Initially I tested all these mods with AMIKEY-2 salvaged from Zida Tomato 4DPS which is …

Re: What retro activity did you get up to today?

Posted on 2021-04-23, 11:17

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I've just finished soldering extra chips to my spare SIMMs and now I have 2 8Mb 72-pin FPM ones. So I'm gonna install Windows '95 on my 66MHz 486 VLB rig.

Re: LuckyStar LS-486e Rev:D Hardware Upgrade Guide

Posted on 2021-04-23, 08:29

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Document revision 4 is out. Changes: jumper wire tying pin 26 of Holtek HT6542B to +5V. W/o jumper wire it worked fine with AMIKEY-2 but failed to initialize keyboard controller with POST code 0x05 with HT6542B.

Re: LuckyStar LS-486e Rev:D Hardware Upgrade Guide

Posted on 2021-04-18, 08:36

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Document revision 3 is out. Changes: R51 value changed from 10k to 4.7k to avoid mouse glitches.

Re: USB Floppy

Posted on 2021-03-30, 12:42

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I use this one and it does its job well Filename IMG_20210330_153406.jpg File size 370.77 KiB Views 1957 views Filename IMG_20210330_153423.jpg File size 351.29 KiB Views 1957 views

Re: Compaq deskpro PSU go boom.

Posted on 2021-03-22, 17:34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hopefully it was something in the PSU that cause the pop and the new one doesnt just pop as well. Looks like high voltage diodes decided to do some fireworks. Remove remains, check for short circuit behind them, solder in new ones. Looks pretty simple. ...and clear all that dusty crap out. This is …

Re: LuckyStar LS486E problem with PCI IDE

Posted on 2021-03-22, 17:28

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

maxtherabbit wrote on 2021-03-22, 13:29: Yep. The issue doesn't seem to be related to option ROMs, the board just doesn't play nice with add-on disk controllers. Will check as soon as I find my SiI3112 PCI sATA controller. It worked on Zida 4DPS.

Re: LuckyStar LS486E problem with PCI IDE

Posted on 2021-03-21, 10:47

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Roman555 wrote on 2021-03-21, 07:42: And I forgot to mention that more often LS-486E works only with FPM RAM. EDO RAM is rarely compatible with this board because it depends on chipset revision. Usually EDO causes errors during the start. The only revision proven to work with EDO is Rev:D.

Re: LuckyStar LS486E problem with PCI IDE

Posted on 2021-03-20, 23:22

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

then it goes back to normal, but only until I load EMM386 or JEMMEX and try to load drivers into UMB, then the gibberish comes back Have similar memory corruption on my Rev:D. Looks like you allows DOS to write to the regions occupied by ROM. Try UMBINFO (it has German interface but still usable) …

Re: LuckyStar LS-486e Rev:D Hardware Upgrade Guide

Posted on 2021-03-19, 14:34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Oh, my bad. CN1 is DIN-5 keyboard connector. BTW, check this out The AT-PS/2 Keyboard Interface by Adam Chapweske.

Re: LuckyStar LS-486e Rev:D Hardware Upgrade Guide

Posted on 2021-03-19, 08:38

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

maxtherabbit wrote on 2021-03-19, 00:47: this is my board - no obvious revision markings I can see Looks pretty much like C2. Have you tried to trace back CN1 and CN5 and resistor packs RN4, RN5 and RP9?

Re: LuckyStar LS-486e Rev:D Hardware Upgrade Guide

Posted on 2021-03-18, 20:55

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'll have to look at the board again to get you the exact revision. It's the one where the DIP24 KBC is tucked in between the ISA slots. Now I'm tracking about the BIOS, guess I'll stick with what I have since my board used the Winbond super IO Your BIOS string should be like "486E 96/10/24 WB3787 …

Re: LuckyStar LS-486e Rev:D Hardware Upgrade Guide

Posted on 2021-03-18, 18:17

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'll be releasing a PS/2 add-on board for rev C shortly. Will post here when it's fully tested. It will require desoldering the 24-pin KBC from the motherboard same as rev D, but will then connect the add-on board to that footprint using a 24pin ribbon cable. What is your mobo exact revision? I saw …

Re: Owners of the Lucky Star LS-486E Revision D - PS/2 Mouse / Please help

Posted on 2021-03-18, 13:24

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Looks like this topic is done. Summarized info is here

LuckyStar LS-486e Rev:D Hardware Upgrade Guide

Posted on 2021-03-18, 13:21

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Dealing with some old damaged LS-486e motherboards ended up repairing and upgrading them. So I've decided to summarize my experience in hardware modifying of these motherboards in a single illustrated guide. Here it is LuckyStar LS-486e Rev:D Hardware Upgrade Guide This guide contains complete bill …

Re: Recommendations on soldering services?

Posted on 2021-03-17, 12:04

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Heh.. a good soldering iron does help. The plunger type al ways made me scared when I pressed the button that it was going to damage the pad on the motherboard from the sudden jerk it did. They also take multiple plunges to remove solder from larger holes. They are just a pain to use, especially …

Re: Owners of the Lucky Star LS-486E Revision D - PS/2 Mouse / Please help

Posted on 2021-03-17, 00:41

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yes it works! 😀) Gonna do some more checks and photos before writing my "Lucky Star LS-486e Rev:D Ultimate Upgrade Guide" 😀

Re: Owners of the Lucky Star LS-486E Revision D - PS/2 Mouse / Please help

Posted on 2021-03-16, 15:43

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Not having the interrupt line connected causes exactly what your described. MS-OBFO should be directly connected to IRQ12 Thanks, man! Will solder JP19 closed. According to Holtek documentation MS-OBFO is pulled low if PS/2 mouse support is off. I think it's safe to leave this jumper closed forever …

Re: Owners of the Lucky Star LS-486E Revision D - PS/2 Mouse / Please help

Posted on 2021-03-16, 08:34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I swapped VT83C41 to AMIKEY-2 I salvaged from dead 4DPS board and it almost works. - Planting 74LS06 renders old VT83C41 completely unusable either with pull-up resistor pack (no key presses detected) or without it (some keys stuck forever). - Replacing VT83C41 with AMIKEY-2 brings everything to …

Re: Sound cards - from best to worst

Posted on 2021-03-01, 12:41

in Marvin \ Sound

in Marvin \ Sound

pc-sound-legacy wrote on 2021-02-28, 23:37: I would recommend a non-pnp / jumper controlled card for a 486 system. So the ES688 (dedicated OPL3) or ES1688 (ESFM) would be good choice if available. Why shouldn't I use PnP on mobo with PnP capable BIOS?

Page 4 of 7

Go to top of page Go to top of page