The retro gaming community has seen a remarkable shift over the past decade. As time marches on, enthusiasts gain deeper access to older systems. This is partially a product of modern computing having much more power to emulate demanding hardware. But it is also because many hobbyists have spent countless hours studying their favorite consoles. One name that stands out in this space is [tschicki], who reverse engineered the PlayStation 2 to create a custom mainboard for a handheld version. This ps2 custom mainboard still uses some of the original chips from the console. It represents a blend of authenticity and modern convenience. The project includes USB power delivery via an RP2040, digital video output, SD card support, a customized boot ROM, and upgraded audio. The DualShock 2 controller is built into the handheld, and the case is designed for 3D printing. It is an impressive effort that preserves the original feel without relying entirely on ancient hardware.
But [tschicki] is not the only person to attempt this kind of build. Over the years, several other custom mainboard designs have emerged. Each takes a different approach to the challenge of making a portable PS2. Some lean heavily on original components. Others embrace modern emulation. All of them require specialized tools and a high degree of skill. This article explores seven distinct custom mainboard concepts for a portable PlayStation 2. Whether you are a hardware hacker or a retro gaming enthusiast, these designs offer a fascinating look at what is possible.
1. The Reverse-Engineered Original Chip Board by [tschicki]
This design is the most faithful to the original console. [tschicki] spent considerable time and effort reverse engineering the PlayStation 2 architecture. The resulting ps2 custom mainboard retains key original chips such as the Emotion Engine CPU and the Graphics Synthesizer GPU. These components handle the core processing and rendering tasks. The rest of the board is built from scratch using modern components.
One of the standout features is the RP2040 microcontroller. It manages USB-C power delivery, which means the handheld can charge from a standard laptop charger or power bank. The board also outputs digital video through a clean HDMI connection. Storage is handled via SD cards, eliminating the need for original disc drives. The boot ROM has been customized to work without a DVD drive. Audio has been upgraded to support cleaner output through a modern DAC. The DualShock 2 controller is integrated directly into the handheld’s PCB. The entire case is 3D printable, making the design accessible to anyone with a printer.
This approach offers the most authentic gaming experience. Original chips ensure perfect compatibility with the PS2 library. However, sourcing those chips is a challenge. They are no longer manufactured, so builders must harvest them from donor consoles. The project also requires advanced soldering skills and access to hot air rework stations. [tschicki] provides full instructions on the project site, but warns that this is not for the faint of heart.
2. The Trimmed Original Motherboard Approach
Another common method for building a portable PS2 involves trimming an original motherboard. This technique has been used for years by modders who want to shrink a console into a handheld form factor. Instead of reverse engineering the entire board, the builder cuts away unnecessary sections of the original PCB. Traces are carefully rerouted to connect the remaining components.
This approach preserves 100% compatibility with the PS2 library. The original chips remain untouched. The main challenge is the physical trimming process. The original PS2 motherboard has multiple layers of copper traces. Cutting through them without damaging essential connections requires precision and patience. Builders often use a rotary tool with a fine cutting bit. They also need to reinforce the trimmed edges with epoxy or solder mask.
The trimmed board is then paired with a custom power delivery system and a display driver. Batteries are typically lithium polymer packs. The case is usually 3D printed or vacuum-formed. This method is well-documented in the portable console modding community. It is a good option for builders who want authenticity without the complexity of reverse engineering. The downside is that the final device is often bulkier than a custom board design. The original chips also consume more power than modern alternatives, so battery life tends to be shorter.
3. The FPGA-Based PS2 Emulation Board
Field Programmable Gate Arrays offer a third path to a portable PS2. An FPGA can be programmed to mimic the behavior of the original hardware at a gate level. This is different from software emulation. The FPGA recreates the actual logic circuits of the Emotion Engine and Graphics Synthesizer. The result is cycle-accurate performance with very low latency.
Several open-source projects have attempted FPGA-based PS2 cores. The MiSTer platform, which uses a Terasic DE10-Nano board, has a PS2 core in development. However, the PS2 is one of the most complex consoles ever made. Its Emotion Engine has a custom instruction set and a complex vector unit. The Graphics Synthesizer has a unique rendering pipeline. Recreating all of this in an FPGA requires enormous logic resources. Current FPGA boards that can handle the PS2 are expensive and large.
A custom mainboard built around a high-capacity FPGA could potentially fit in a handheld form factor. The board would include DDR3 or DDR4 memory for the FPGA, a USB-C power controller, and a display driver. The FPGA would load the PS2 core from an SD card. This design would eliminate the need for original chips entirely. It would also allow for hardware-level enhancements like higher resolution and texture filtering. The main drawback is the cost and complexity of the FPGA itself. A suitable chip like the Intel Agilex or Xilinx Kintex series can cost several hundred dollars. The PCB design for such a chip is also extremely demanding. This approach is best suited for experienced FPGA developers with deep pockets.
4. The Hybrid Board with Original CPU and Modern FPGA
This design combines the best of both worlds. It uses the original Emotion Engine CPU for core processing but replaces the Graphics Synthesizer with an FPGA-based GPU. The idea is to retain the authentic CPU behavior while gaining modern video output capabilities. The FPGA handles graphics rendering and can output HDMI directly. This eliminates the need for the original GPU, which is one of the hardest chips to source.
The hybrid approach also simplifies the power delivery system. The original CPU runs at a fixed voltage, but the FPGA can be powered by a modern regulator. The board would include an RP2040 or similar microcontroller for USB-C power negotiation. Storage would be handled by an SD card interface. The boot ROM would need to be modified to work without the original GPU. This is a significant software challenge, but it is achievable with careful reverse engineering.
This design offers a good balance of authenticity and modern convenience. The CPU ensures compatibility with the vast majority of PS2 games. The FPGA provides clean digital video and the option for upscaling. The board would be smaller than a full original motherboard. The main difficulty is interfacing the CPU with the FPGA. The original bus between the Emotion Engine and the Graphics Synthesizer runs at high speed and uses a proprietary protocol. Decoding this protocol requires deep knowledge of the PS2 architecture. Only a handful of developers in the world have this level of expertise.
5. The Raspberry Pi Compute Module 4 PS2 Emulation Board
For builders who prioritize simplicity and cost, a Raspberry Pi CM4-based board is an attractive option. The CM4 has a quad-core ARM Cortex-A72 CPU and a VideoCore VI GPU. It can run a PS2 emulator like PCSX2 at playable speeds for many games. A custom carrier board would provide the necessary interfaces for a handheld form factor.
The carrier board would include a USB-C power controller, an HDMI display driver, audio DAC, SD card slot, and controller inputs. The RP2040 could again handle power negotiation and button mapping. The case would be 3D printed to fit the CM4 module and the carrier board. The entire system would run a lightweight Linux distribution that boots directly into the emulator.
This approach is far less complex than the other designs. The CM4 is widely available and well-documented. The carrier board can be designed with standard PCB tools. The software side is also simpler because the emulator is already mature. However, emulation accuracy is not perfect. Some games have graphical glitches or performance issues. The CM4’s GPU is not as powerful as a dedicated FPGA solution. Battery life can also be a concern because the CM4 draws significant power under load. This design is best for builders who want a functional portable PS2 without the extreme challenges of reverse engineering original hardware.
6. The All-In-One Modern SoC Board with Software Emulation
Several modern system-on-chip platforms have enough power to emulate the PS2 in software. Examples include the Qualcomm Snapdragon 8 series, the Rockchip RK3588, and the Allwinner H616. A custom mainboard built around one of these SoCs could deliver a compact handheld PS2. The SoC handles all processing, including CPU, GPU, and I/O. The board would include RAM, storage, power management, and display interfaces.
This design is similar to the CM4 approach but uses a more powerful chip. The RK3588, for instance, has four Cortex-A76 cores and four Cortex-A55 cores, plus a Mali-G610 GPU. It can run PCSX2 at full speed for many titles. The board would include a USB-C controller, SD card slot, audio codec, and display driver. The RP2040 could handle low-level tasks like power sequencing and button scanning. The case would be designed around the specific SoC module.
The advantage of this approach is performance. Modern SoCs are more powerful than the CM4 and can handle a wider range of PS2 games. They also support hardware video encoding, which could be used for streaming or recording gameplay. The main challenge is software integration. The emulator must be optimized for the specific SoC. The board design must also account for thermal management because these chips generate significant heat. This is a viable option for builders who are comfortable with embedded Linux and have experience with high-speed PCB design.
7. The Community-Driven Open-Source Reference Board
The final concept is not a single design but a framework for collaboration. An open-source reference board for a portable PS2 would standardize the key interfaces. It would include a defined pinout for the original chips, a power management section, a display connector, and a controller interface. The board would be designed in KiCad or Altium and released under a permissive license. The community could then adapt the design for different chips or form factors.
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This approach lowers the barrier to entry for newcomers. Instead of starting from scratch, a builder could take the reference board and modify it for their specific needs. The reference board would include detailed documentation for each section. The power delivery circuit would be explained in full. The video output section would include options for both analog and digital. The controller interface would support both original DualShock 2 pads and modern equivalents.
The open-source model also encourages continuous improvement. If one contributor finds a way to reduce power consumption, that change can be merged into the main design. If another contributor develops a better audio circuit, it can be added. Over time, the reference board would evolve into a mature platform. This is the same model that has worked so well for projects like the Raspberry Pi and the Arduino. It requires a dedicated maintainer and an active community, but the results can be transformative. For the PS2 portable scene, an open-source reference board could be the catalyst that turns a niche hobby into a thriving ecosystem.
What It Takes to Build One of These Custom Mainboards
All of these designs share one thing in common. They require a high degree of skill and specialized tools. Soldering fine-pitch components like BGAs and QFNs demands a hot air rework station and a quality soldering iron. Multilayer PCBs require careful design to avoid signal integrity issues. Programming the boot ROM or FPGA core requires knowledge of assembly language and hardware description languages.
Before jumping into a build, assess your own experience level. If you have never soldered a surface-mount component, start with a simpler project. Build a Game Boy Zero or a Raspberry Pi handheld first. Learn how to design a basic PCB in KiCad. Practice with a hot air station on scrap boards. The skills you develop will translate directly to a PS2 portable project.
Sourcing original chips is another major hurdle. The Emotion Engine and Graphics Synthesizer are no longer in production. You will need to harvest them from donor consoles. This means buying broken PS2 units and carefully desoldering the chips. The process is delicate and carries a risk of damaging the components. Some builders have found success buying pre-harvested chips from online marketplaces, but prices have risen as demand increases.
For those who prefer not to use original chips, the FPGA and SoC-based designs offer alternatives. These require less hazardous harvesting but demand more expertise in digital design and embedded software. The FPGA approach, in particular, is a deep rabbit hole. You will need to learn Verilog or VHDL and understand the PS2 architecture at a gate level. This is not a weekend project. It is a months-long or even years-long endeavor.
Why Build a Custom Mainboard Instead of Buying a Pre-Made Handheld?
Commercially available emulation handhelds like the AYN Odin or the Retroid Pocket can play many PS2 games. They are cheaper and easier to obtain than a custom-built device. So why go through the trouble of building a custom mainboard?
The answer comes down to authenticity and learning. A custom mainboard that uses original chips offers perfect compatibility. No emulation glitches. No frame drops. No input lag. The experience is identical to playing on a real PS2. For purists, this matters. Additionally, the process of building the device teaches you an enormous amount about hardware design, reverse engineering, and embedded systems. The knowledge you gain is valuable in itself.
There is also the satisfaction of creating something unique. A custom handheld PS2 is a conversation piece. It is a demonstration of skill and dedication. It is something that no store-bought device can replicate. For many builders, the journey is as rewarding as the destination.
Resources for Getting Started
If you are interested in attempting a ps2 custom mainboard build, start by studying the work of [tschicki]. The project site includes schematics, PCB files, and firmware code. Read through the documentation thoroughly before ordering any components. Join community forums like the BitBuilt forums or the r/consolemodding subreddit. These communities are full of experienced builders who can offer advice and troubleshooting help.
Invest in good tools. A soldering station with temperature control, a hot air rework station, a multimeter, and an oscilloscope are essential. A PCB microscope is also highly recommended for inspecting fine-pitch solder joints. Design your PCB using KiCad or Eagle. Order prototypes from a manufacturer like JLCPCB or PCBWay. Expect to go through several iterations before getting a working board.
Be patient. This is not a quick build. It will take months of work, and you will likely make mistakes. Every mistake is a learning opportunity. Keep a notebook of your findings. Share your progress with the community. The collective knowledge of the retro gaming community is what makes projects like this possible.
For such a popular console, it is no surprise that we have seen plenty of other handheld PS2 designs before. From the trimmed original board approach to the FPGA-based emulation core, each design pushes the boundaries of what is possible. The work of [tschicki] and others ensures that the PlayStation 2 will live on in portable form for years to come. Thanks to [raz] for the tip that started this exploration.
