Re: Cheap Homebrew ISA->PC104 adapters

Posted on 2022-06-12, 12:44

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by dekkit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

[quote=rasteri post_id=1078875 time=1655036648 user_id=42878] [quote=dekkit post_id=1078872 time=1655036320 user_id=48013] By far the hardest part was soldering the pins of the otherside of the pc104 (as its tricky to get the iron around when you have all idc rows next to each other) - so if I do …

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Re: Cheap Homebrew ISA->PC104 adapters

Posted on 2022-06-12, 12:18

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by dekkit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The SBC im working with can be found here: https://www.vogons.org/viewtopic.php?t=87786 It had zero documentation available for it, and very little written on the pcb. So I've slowly been mapping out the pins based on the datasheets for the IC s and making a few educated guesses based on similar era …

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Re: Help with mapping out a Single Board Computer (SBC) - 486-DX2-80 - Innovative Technologies, Houston, Texas

Posted on 2022-05-22, 09:10

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by dekkit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Doom Test Obligatory 'did it run' doom? Yes, performance was smooth and very playable, but admittedly didn't check for frames etc. Keen to put a sound card in this at some future point. Filename 44_IDE_TEST_DOOM.jpg File size 940.1 KiB Views 71 views

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Re: Help with mapping out a Single Board Computer (SBC) - 486-DX2-80 - Innovative Technologies, Houston, Texas

Posted on 2022-05-22, 09:02

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by dekkit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

IDE Socket - 44pin and also 40pin - F82C735 While there were only few likely contenders, I decided to search for which IC controls the IDE ports - particularly as i wasn't sure what that other 40 pin was for. The CHIPS F82C735 controller handles not only the IDE port but printer port, com ports, …

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Re: Help with mapping out a Single Board Computer (SBC) - 486-DX2-80 - Innovative Technologies, Houston, Texas

Posted on 2022-05-22, 08:05

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by dekkit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

PS/2 Keyboard Pin out - CHIPS F84041 After getting VGA out, was keen to access the BIOS and see what options were available. Given that this era computing typically had PS/2 keyboard and mouse sockets on the board, i went looking the Chips IC mostly likely to control the keyboard and mouse. Then …

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Re: Help with mapping out a Single Board Computer (SBC) - 486-DX2-80 - Innovative Technologies, Houston, Texas

Posted on 2022-05-04, 14:04

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by dekkit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Video Output Test Good to see it boots and the ram on passed the initial test (32MB will plenty for this), the CMOS battery was clearly dead, but a little disappointed that it was only registering 66Mhz (but hopeful i can benchmark this properly at some point). For power, I threw together pico psu …

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Re: Help with mapping out a Single Board Computer (SBC) - 486-DX2-80 - Innovative Technologies, Houston, Texas

Posted on 2022-05-04, 13:53

by

by dekkit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

VGA pin out - CHIPS F65548 - FlatPanel VGA Controller From reading through various SBC docs, many of these era industrial SBC were designed to be able to be used with either digital LCD panels or VGA monitors. Scanning the PCB, i noticed a large IC that I suspected might be part of the video …

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Help with mapping out a Single Board Computer (SBC) - 486-DX2-80 - Innovative Technologies, Houston, Texas

Posted on 2022-05-04, 12:31

by

by dekkit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

A few months ago I acquired the following neatly sized 486dx2-80 and SBC motherboard off a local market place advert but unfortunately couldn't find much user information at all on it online. I have slowly been going through studying the ICs - ie reading through 'Chips' datasheets for pin outs and …

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Re: List of open-source PC hardware projects

Posted on 2022-04-30, 16:27

by

by dekkit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

A reproduction of an old Toshiba port replicator (it adds an external vga socket, ext keyboard, ext mouse) for a few models that dont have a vga port. It does this by using a pcb edge connector to mimic a proprietary socket. Adding in case anyone else needs one or would like to modify the design. …

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Re: Cheap Homebrew ISA->PC104 adapters

Posted on 2022-04-30, 11:56

by

by dekkit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Just wanted to say many thanks for your work and for sharing the gerbers for this (and your other projects while I'm at it). I'm in the process of converting a small industrial socket3 486 mainboard into a mini dos rig and I can now add a cheaper isa sound card thanks to this! (I'm using the smaller …

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Replace 3.5v CMOS battery with a 3V cell battery?

Posted on 2022-04-10, 14:01

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by dekkit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have a dead 3.5v CMOS battery soldered into a "socket 3" SBC style motherboard. Would be safe to replace it with a battery cell holder and then use more common 3v batteries? 20220403_131437~2.jpg Brand: Keeper, LTC-7PN 3.5v 750mAH Note - it is a long life lithium battery (i believe designed for …

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Re: toshiba 440 series laptop wont turn on

Posted on 2022-03-30, 11:50

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by dekkit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Also if I've fried something (i.e. when pulling the RTC and sub-batteries out) would anyone have any suggestions on what PCB components typically go on this era of Toshiba laptop (fuses, moffsets, etc.)? Keen to only strip it down once, so making a checklist of things to test before I start.

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SBS ASF-PC104 1553 Interface Card - possible uses?

Posted on 2022-03-28, 23:15

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by dekkit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I managed to obtain the following PC/104 card in a bundle of old industrial pc hardware...curious to know what they were typically used for and possible applications in a retro pc setup (with an isa to pc/104 adapter or Single board setup) ad_1648508750677(1).jpg While it looks like new old stock, …

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Re: toshiba 440 series laptop wont turn on

Posted on 2022-03-27, 12:57

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by dekkit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

A quick test I came up with during my problems with 440cdt: Does function key light turn on when you press the fn button? If it does -> software, bios or display issue, try plugging in external monitor If it doesn't -> hardware lockup, won't be easy to diagnose. Check for shorts on hdd connector. …

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Re: toshiba 440 series laptop wont turn on

Posted on 2022-03-27, 10:42

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by dekkit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have a 440cdx that experiencing this exact same issue. My situation - have video of it booting fine (before i bought it) - as soon as i took it home, ripped out main Large battery, removed Rtc.battery and sub-battery. - Cleaned up tiny amount of corrosion on internal battery socket , (inside …

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Re: Help with obscure Toshiba docking station

Posted on 2022-03-04, 10:57

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by dekkit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Success! Filename IMG-20220304-WA0005~2.jpg File size 55.45 KiB Views 78 views

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Re: Help with obscure Toshiba docking station

Posted on 2022-03-03, 14:20

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by dekkit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Good points on making up the PCB with ENIG, it will definitely last longer. That said i went with the cheaper option while prototyping and see how long it lasts but ill add that note to the github notes. They are pretty quick to make as a cheap diy, so easily replaced worst case. The other discovery …

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Re: Newly made PCMCIA sound card

Posted on 2022-02-17, 09:49

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by dekkit

in Marvin \ Sound

in Marvin \ Sound

@yyzkevin Any chance i can buy 2x for a couple of 486 laptop projects im looking to finish and super keen to test this with dos era gaming.

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Re: Help with obscure Toshiba docking station

Posted on 2022-02-11, 13:11

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by dekkit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Last pcb version design now in production, once tested will upload onto the github and finalise this project. Filename Schematic_Dek's Mini Port Replicator PA2703U (VGA + Keyboard + Mouse)_3d_va02~2.png File size 88.45 KiB Views 247 views

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Re: Newly made PCMCIA sound card

Posted on 2022-02-07, 08:47

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by dekkit

in Marvin \ Sound

in Marvin \ Sound

Looking forward to buying a few! Another alternative could be to use a right angled IDC pcb socket and a standard ribbon cable (maybe a 16pin or larger one if more pins if needed and it would fit). Thats if its just case of using the pcmcia adapter to connect to another daughter board. Cant wait to …

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