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Q5K: Quake level viewer in 5K LUTs on a low cost, low power ice40 up5k #fpga! Custom #GPU, @risc_v CPU and SOC, capable of rendering #Quake's level with lightmaps.
How? Thread 👇
(Written in #Silice, here running on the #mch2022 badge fpga)
How? Thread 👇
(Written in #Silice, here running on the #mch2022 badge fpga)
The (tiny) GPU is my DMC-1 (Doom-Meets-Comanche) GPU, which also powers the Doomchip-onice demos (remember? Doom with a terrain!!).
It targets the ice40 UP5K, an entry-level fpga with great support from the Open Source toolchain #yosys/#nextpnr.
2/n
It targets the ice40 UP5K, an entry-level fpga with great support from the Open Source toolchain #yosys/#nextpnr.
2/n
There were four main hardware changes to enable Quake level rendering:
1) 32-bits per-column depth,
2) streaming of level data from QPI memory (SPIflash on icebreaker, PSRAM on mch2022 badge),
3) multi-texturing for lightmaps (!!)
3/n
1) 32-bits per-column depth,
2) streaming of level data from QPI memory (SPIflash on icebreaker, PSRAM on mch2022 badge),
3) multi-texturing for lightmaps (!!)
3/n
