motherboard

30 Articles

PlayStation Motherboard Sanded And Scanned, But There’s More To Do

December 9, 2024 by 13 Comments

If you want to reverse engineer the boards in a modern console, you’d better have a lab, a lot of fancy gear, and a good few months to dedicate to the task. The humble PlayStation, on the other hand, is more accessible in this regard. [Lawrence Brode] pulled one apart and started documenting it as part of a grander quest for console understanding.

[Lawrence’s] ultimate goal is to create a portable PlayStation using original hardware. That is, rather than cannibalizing an existing console, he wants to build an original portable from scratch. He needed to understand the PlayStation to recreate it, so he started by analyzing the original hardware.

The first part of [Lawrence’s] quest was to try and reverse engineer the PlayStation motherboard itself. The 1990s console has the benefit of only using a two-layer PCB, meaning it’s far easier to trace out than more modern multi-layer designs. [Lawrence] started with a damaged console, pulled out the motherboard, and stripped off all the components. He then cleaned the board, scanned it, and then sandblasted it to remove the solder mask.

He’s begun the work of tracing out signals, and next on the agenda is to create a new custom PCB that’s compatible with the original PlayStation hardware. You can grab his work via GitHub if you’re interested. [Lawrence] is also excited about the possibilities of grabbing the 24-bit RGB signal heading into the GPU and using it for an HDMI output conversion in the future.

It’s always an exciting time in the PlayStation community; we see lots of great hacks on the regular. If you’re cooking up your own, don’t hesitate to drop us a line!

How Corroded Can A Motherboard Be?

December 5, 2024 by 9 Comments

We will admit it. If we found a 386 motherboard as badly corroded as the one [Bits und Bolts] did, we would trash it—not him, though. In fact, we were surprised when he showed it and said he had already removed most of it in vinegar. You can check the board out in the video below.

There was still a lot of work to do on both the front and back of the board. The motherboard was a Biostar and while it isn’t as dense as a modern board, it still had plenty of surface mount parts jammed in.

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Some SPI Flash Chip Nuances Worth Learning

September 29, 2024 by 13 Comments

Some hackers have the skills to help us find noteworthy lessons in even the most basic of repairs. For instance, is your computer failing to boot? Guess what, it could just be a flash chip that’s to blame — and, there’s more you should know about such a failure mode. [Manawyrm] and [tSYS] over at the Kittenlabs blog show us a server motherboard fix involving a SPI flash chip replacement, and tell us every single detail we should know if we ever encounter such a case.

They got some Gigabyte MJ11-EC1 boards for cheap, and indeed, one of the BIOS chips simply failed — they show you how to figure that one out. Lesson one: after flashing a SPI chip, remember to read back the image and compare it to the one you just flashed into it! Now, you might be tempted to take any flash chip as a replacement, after all, many are command-compatible. Indeed, the duo crew harvested a SPI chip from an ESP32 board, the size matched, and surely, that’d suffice.

That’s another factor you should watch out for. Lesson two is to compare the SPI flash commands being used on the two chips you’re working with. In this case, the motherboard would read the BIOS alright and boot just fine, but wasn’t able to save the BIOS settings. Nothing you couldn’t fix by buying the exact chip needed and waiting for it to arrive, of course! SPI flash command sets are fun and worth learning about — after all, they could be the key to hacking your “smart” kettle. Need a 1.8 V level shifter while flashing? Remember, some resistors and a NPN transistor is more than enough.

PCB data sheet of a custom 4-bit microcontroller

Building A Microcontroller From Scratch: The B4 Thinker Project

August 25, 2024 by No comments

[Marius Taciuc’s] latest endeavor, the B4 Thinker, offers a captivating glimpse into microcontroller architecture through a modular approach. This proof-of-concept project is meticulously documented, with a detailed, step-by-step guide to each component and its function.

Launched in 2014, the B4 Thinker project began with the ambitious goal of building a microcontroller from scratch. The resulting design features a modular CPU architecture, including a base motherboard that can be expanded with various functional modules, such as an 8-LED port card. This setup enables practical experimentation, such as writing simple assembly programs to control dynamic light patterns. Each instruction within this system requires four clock pulses to execute, and the modular design allows for ongoing development and troubleshooting.

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Steamdeck motherboard standing upright propped onto a USB-C dock it's wired up to, showing just how little you need to make the steamdeck board work.

Steam Deck, Or Single Board Computer?

August 3, 2024 by 8 Comments

With a number of repair-friendly companies entering the scene, we have gained motivation to dig deeper into devices they build, repurpose them in ways yet unseen, and uncover their secrets. One such secret was recently discovered by [Ayeitsyaboii] on Reddit – turns out, you can use the Steam Deck mainboard as a standalone CPU board for your device, no other parts required aside from cooling.

All you need is a USB-C dock with charging input and USB/video outputs, and you’re set – it doesn’t even need a battery plugged in. In essence, a Steam Deck motherboard is a small computer module with a Ryzen CPU and a hefty GPU! Add a battery if you want it to work in UPS mode, put an SSD or even an external GPU into the M.2 port, attach WiFi antennas for wireless connectivity – there’s a wide range of projects you can build.

Each such finding brings us closer to the future of purple neon lights, where hackers spend their evenings rearranging off-the-shelf devices into gadgets yet unseen. Of course, there’s companies that explicitly want us to hack their devices in such a manner – it’s a bet that Framework made to gain a strong foothold in the hacker community, for instance. This degree of openness is becoming a welcome trend, and it feels like we’re only starting to explore everything we can build – for now, if your Framework’s or SteamDeck’s screen breaks, you always have the option to build something cool with it.

[Via Dexerto]

The Amiga We All Wanted In 1993

June 4, 2024 by 51 Comments

To be an Amiga fan during the dying days of the hardware platform back in the mid 1990s was to have a bleak existence indeed. Commodore had squandered what was to us the best computer ever with dismal marketing and a series of machines that were essentially just repackaged versions of the original. Where was a PCI Amiga with fast processors, we cried!

Now, thirty years too late, here’s [Jason Neus] with just the machine we wanted, in the shape of an ATX form factor Amiga motherboard with those all-important PCI slots and USB for keyboard and mouse.

What would have been unthinkable in the ’90s comes courtesy of an original or ECS Amiga chipset for the Amiga functions, and an FPGA and microcontroller for PCI and USB respectively. Meanwhile there’s also a PC floppy drive controller, based on work from [Ian Steadman]. The processor and RAM lives on a daughter card, and both 68040 and 68060 processors are supported.

Here in 2024 of course this is still a 1990s spec board, and misty-eyed speculation about what might have happened aside, it’s unlikely to become your daily driver. But that may not be the point, instead we should evaluate it for what it is. Implementing a PCI bus, even a 1990s one, is not without its challenges, and we’re impressed with the achievement.

If you’re interested in Amiga post-mortems, here’s a slightly different take.

Antique Motherboard Speaks

October 22, 2023 by 18 Comments

[Bits und Bolts] has been restoring an old PC motherboard with the infamous bad electrolytic capacitors. The video of his exploits was interesting enough, but pretty standard stuff. What we found interesting though, was an odd feature of the ASUS Bios called “Post Reporter” that let the motherboard speak error codes and status through the external speaker. (Video, embedded below.) We aren’t sure who wanted that, and since we haven’t seen it around lately, we are guessing the answer was nobody wanted it.

We enjoyed watching the PCB rework. Those large internal ground plane layers do make it hard to unsolder and then solder the caps. That makes the job seem deceptively easy. However, if you want to skip to the exotic BIOS, jump to the 8:20 mark.

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