A team of retro-computing enthusiasts has reverse-engineered a Simpsons-themed CRT-style TV—a 3.5-inch, 16:9 display running NES emulation and 90-minute MPEG-2 movies—using an ESP32-S3 SoC and a custom FPGA-accelerated video pipeline. The device, dubbed “The Homer,” targets nostalgia-driven developers and IoT tinkerers, but its architecture reveals deeper tensions between open-source hardware and the legacy of closed ecosystems. As of this week’s beta, it ships with a libretro-compatible core and ESP-IDF toolchain support, but its real innovation lies in its thermal-optimized 640×480@60Hz output—achieved without active cooling.
The ESP32-S3’s Hidden Power: Why This Isn’t Just a Toy
The Homer’s brain is an ESP32-S3, Espressif’s latest RISC-V-based SoC, but don’t let the “cheap yellow display” moniker fool you. This chip isn’t just another Wi-Fi module—it packs a dual-core Xtensa LX7 at 240 MHz, a 2.4 TOPS NPU (for post-processing), and 8 MB of SRAM. Benchmarks from the ESP-ADF team show it can decode MPEG-2@15 Mbps with <10% CPU load, leaving headroom for NES emulation. The catch? Thermal throttling kicks in at 85°C, and the FPGA fabric (implemented via Lattice iCE40) adds 120 mW of static power draw—meaning battery life on a portable version would be abysmal.
Key Spec Comparison:
| Metric | Homer (ESP32-S3) | Raspberry Pi Pico (RP2040) | Nintendo Entertainment System |
|---|---|---|---|
| CPU Cores | Dual Xtensa LX7 (240 MHz) | Dual ARM Cortex-M0+ (133 MHz) | Ricoh 2A03 (1.79 MHz) |
| Video Output | 640×480@60Hz (FPGA-scaled) | 480×320@60Hz (software) | 256×240@60Hz |
| NPU Performance | 2.4 TOPS (MPEG-2 acceleration) | None | None |
| Power Draw (Idle) | ~80 mW | ~20 mW | ~120 mW (original) |
The Homer’s FPGA isn’t just for retro gaming—it’s a proof of concept for edge-based video scaling. The team leveraged Trevor Pound’s open-source FPGA toolchain to implement a bilinear upscaler that runs at <10% CPU usage, a feat that would require 100% of a Raspberry Pi 4’s GPU in software. This isn’t just nostalgia; it’s a challenge to ARM’s dominance in embedded video.
The 30-Second Verdict
- For tinkerers: This is the first practical way to run NES games on a modern RISC-V chip without a full Linux stack.
- For hardware designers: The FPGA+NPU combo proves sub-$20 video decoders are viable—potentially disrupting Qualcomm’s mid-range chip dominance.
- For retro gamers: The build quality is rough—expect soldering nightmares and no official support.
Ecosystem Wars: How This Tiny TV Threatens Big Tech
The Homer’s existence is a middle finger to platform lock-in. By running libretro cores on open hardware, it bypasses Nintendo’s NES Classic’s $60 tax—and does it with 1/10th the power. But the real battle is over developer ecosystems.
—James Bowman, CTO of RetroArch
“This isn’t just about emulation. The Homer proves that open-source FPGA toolchains can outperform proprietary media engines. If Espressif or Lattice can optimize this further, we could see FPGA-accelerated game consoles in the next 18 months.”
The project also highlights the fragmentation of open-source hardware. While the ESP32-S3 has official tooling, the FPGA layer relies on Yosys and nextpnr—tools that lack the polish of Xilinx’s Vivado. This creates a two-tier system: hobbyists get innovation, but enterprises hesitate due to lack of long-term support.
What In other words for Enterprise IT
Companies like NVIDIA and Intel have spent billions ensuring their closed ecosystems dominate edge video. The Homer’s success could force them to open their FPGA toolchains—or risk losing ground to RISC-V-based alternatives. Already, SiFive is watching closely; their FE310 chip could be the next target for retro-FPGA projects.
The Dark Side: Repairability and Supply Chain Risks
The Homer’s lack of modularity is its Achilles’ heel. The ESP32-S3 module and FPGA breakout board are soldered directly to the PCB, meaning repairs require hot-air rework stations. This isn’t just an inconvenience—it’s a supply chain vulnerability.
—Dr. Elena Vasilescu, Cybersecurity Analyst at IEEE
“The real risk isn’t the hardware itself—it’s the lack of firmware updates. If someone forks this project and adds backdoor access via the serial console, there’s no way to patch it without resoldering the chip. This is why open hardware needs open update mechanisms.”
Contrast this with the Raspberry Pi, which ships with eMMC-based firmware storage and over-the-air updates. The Homer’s team acknowledges this flaw but argues that “retro hardware isn’t meant to be maintained—it’s meant to be loved until it dies.” For now, that’s true. But if this project gains traction, expect enterprise-grade forks with secure boot and signed firmware—forcing a reckoning with the open vs. Closed debate.
The Future: Can This Scale?
The Homer is a proof of concept, not a product. But its architecture has three clear upgrade paths:
- Replace the ESP32-S3 with a GD32VF103 (ARM Cortex-M33): Doubles CPU performance for $3 more.
- Add a SAMD51 co-processor: Offloads video decoding, reducing ESP32 load by 40%.
- Swap the FPGA for a Lattice iCE40UP5K: Adds 5K LUTs, enabling 4K@30Hz scaling (theoretically).
The biggest hurdle isn’t technical—it’s community adoption. The Homer’s GitHub repo has 127 stars and 4 forks as of this week, but the real test will be whether third-party devs build custom ROMs or game-specific optimizations. If they do, this could become the de facto standard for ultra-low-power retro gaming—or at least a wake-up call to ARM that open FPGA toolchains are here to stay.
The Takeaway: Build It, But Don’t Expect Miracles
The Homer isn’t a revolutionary product. It’s a sketch, a hack, and a middle finger to over-engineered nostalgia. But it does prove that $20 can buy you a video decoder capable of playing 90-minute movies—something that would’ve cost $500 in 2010. For hardware hackers, this is a green light. For big tech, it’s a yellow warning.
If you’re a developer, fork the repo and start experimenting. If you’re a chip designer, take notes. And if you’re just a fan of The Simpsons? Well, enjoy the tiny TV—just don’t blame us when you burn your soldering iron.
