Pongsagon vichit @mattdiygraphics.bsky.social · 10/05/2026I am using Basys 3 to test the design before submitting it to TinyTapeout to fab an ASIC. Do you submitting anything to this project too? They also run a VGA demoscene competition, many cool retro graphics trick ideas. 000
Pongsagon vichit @mattdiygraphics.bsky.social · 09/05/2026@willflux.bsky.social Thanks to your FPGA & Verilator tutorial that provide valuable material for me to start doing graphics hardware. ProjectF site and Steven Hugg’s book are absolute gems. 120
Pongsagon vichit @mattdiygraphics.bsky.social · 08/05/2026As a big fan of mac, really love your mac series. I got a working mac plus on my desk that has been recapped by another mac lover. 010
Pongsagon vichit @mattdiygraphics.bsky.social · 08/05/2026Your tutorial on FemtoRV is very insightful, especially the part about compiling c to machine code. It really clarified the hardware-software interface. I am planning to use a modify version of FemtoRV on the next tapeout. I also have my 4x4 tiles chip on this shuttle too 😄. 110
Pongsagon vichit @mattdiygraphics.bsky.social · 22/04/2026TinyGPU v3.0 is coming with a programmable pixel shader. Tested on FPGA and submitted to the #TinyTapeout May shuttle (~290k transistors). This Chameleon demo is a tribute to the #GeForce 3, the first programmable GPU released 25 years ago. github.com/pongsagon/tt... 130
Pongsagon vichit @mattdiygraphics.bsky.social · 26/11/2025Thanks. It is about 1k gates for a tile. I am using 16 tiles. For the transistor count, I used a script from github.com/htfab/sky130.... It accumulates transistors based on standard cell types.github.comGitHub - htfab/sky130-cellstatsContribute to htfab/sky130-cellstats development by creating an account on GitHub. 000
Pongsagon vichit @mattdiygraphics.bsky.social · 03/11/2025Spec: - GPU can performs transformation & lighting, rasterization - 4-bit double buffer, 8-bit z buffer store on QSPI RAM - max tri 1K - backface culling - 1 directional light, flat shading - use Gamepad to transform the model & light - run at 25Mhz. When fab, it will use around 200k transistor 120
Pongsagon vichit @mattdiygraphics.bsky.social · 03/11/2025TinyGPU v2.0. A standalone GPU that can display a model file from Flash.Render 1K tri at 6.5fps in 320x240, 4-bit color. Tested on Basys3 FPGA. Submitted to the upcoming #TinyTapeout shuttle. more spec 🧵. git: github.com/pongsagon/tt... 193
Pongsagon vichit @mattdiygraphics.bsky.social · 25/10/2025TinyGPU v2.0. Just completed the rasterization with z-buffer part I am trying to finished transformation & lighting part before the upcoming #TinyTapeout shuttle. 071
Pongsagon vichit @mattdiygraphics.bsky.social · 21/10/2025Just got the Pmod today. To use QSPI Pmod that was plugged into Audio Pmod, do I have to cut the trace of RAM B?(sacrifice RAM B to make room for audio) Thanks for your work. 👍 110
Pongsagon vichit @mattdiygraphics.bsky.social · 11/06/2025Nice one. Glad that someone finally do RP2350 with DVI. I have wait for Adafruit to do it but it seem that they dont do it this time. I really like their Feather RP2040 DVI. I bought them a lot to do keychain size 2D/3D game console projects. 010
Pongsagon vichit @mattdiygraphics.bsky.social · 10/06/2025I see. At first, I think you are using a QSPI pmod with two RAM. I am using your QSPI pmod on my next TinyTapeout project. Trying to study your qspi controller code. Thanks a lot for sharing it. 100
Pongsagon vichit @mattdiygraphics.bsky.social · 09/06/2025When do you write new pixels to the buffer on PSRAM? From my understanding, you use all the RAM bandwidth in the non-blanking interval. Is blanking interval enough to write all the pixels? Thanks. 100
Pongsagon vichit @mattdiygraphics.bsky.social · 03/04/2025Thank you again for your answer. It seems more complicated than I though. Since, I have almost zero knowledge in DDR now. I cannot extraploate all the RAM issues that you are planning to manage. I will surely going to come back to read this again. 🙏 110
Pongsagon vichit @mattdiygraphics.bsky.social · 02/04/2025This post is a gem, valuable experiment. How do you plan to do time sharing of your RAM with the framebuffer, texture and geometry data? 110
Pongsagon vichit @mattdiygraphics.bsky.social · 02/04/2025Not sure I understand it. I have not try DRAM yet. So the bottleneck is the RAM bandwidth right? You are using 16 rasterizers (that can output 16 pixels at a time) because they would reach the peak bandwidth of your DRAM spec. No reason to do more than 16 rasterizers. 110
Pongsagon vichit @mattdiygraphics.bsky.social · 02/04/2025Ok, so the no framebuffer version, your strategy is to max out BRAM to buy more time for beam race right? Instead of using just double line buffers. Nice. 210
Pongsagon vichit @mattdiygraphics.bsky.social · 02/04/2025Wow, thanks a lot for your detailed answer. Please allow me to buy you a cup of coffee for this haha. You really are the Taylor Swift of FPGA. Never disappoint his fan. 110
Pongsagon vichit @mattdiygraphics.bsky.social · 01/04/2025PS. I just received my Tinytapeout Tiniest ASIC GPU back. It work 😁. github.com/pongsagon/tt.... Your comment on my design would be invaluable to me. Thanks.github.comGitHub - pongsagon/tt07-tiniest-gpu: A tiniest GPU that can render only two texture mapped trianglesA tiniest GPU that can render only two texture mapped triangles - GitHub - pongsagon/tt07-tiniest-gpu: A tiniest GPU that can render only two texture mapped triangles 010
Pongsagon vichit @mattdiygraphics.bsky.social · 01/04/2025Thanks for the blog. Two questions sir. 1. When writing pixels from 16 rasterizers, do you write to the same framebuffer or do you have 16 little framebuffers that stitched into one. 2. if 16 rasterizers need texture data, how do you plan to distribute the data. Many thanks 110
Pongsagon vichit @mattdiygraphics.bsky.social · 22/12/2024Thanks. Hard to find tutorial on AXI and SoC. 110
Pongsagon vichit @mattdiygraphics.bsky.social · 18/12/2024Happy to see you post again. Looking forward to it. 110
