#doomchip - Twitter Hashtag

about 4 years ago

2/ The Silice repo contains many other projects, including a basic version of the #doomchip ... 😜 https://t.co/s2K1CyePiP

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Sylvain Lefebvre @sylefeb

over 4 years ago

@risc_v (Oh and yes, it does relate to the #doomchip-onice)

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Sylvain Lefebvre @sylefeb

over 4 years ago

@BrunoLevy01 Current #doomchip status: game levels, sprites, and a terrain on an unmodified icebreaker FPGA (+ oled screen). Wait, what, a terrain? Yup 😋. Not far from a playable game, but not the original, complete remake using original game data. https://t.co/76lf2e2Yc0

Sylvain Lefebvre @sylefeb

over 4 years ago

Progress on sprites for the #doomchip on-ice! Finally found the time to solve the issues with sprites disappearing. (Doom recreation with a terrain on an #ice40 5K LUTs #fpga, written in #Silice)

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Sylvain Lefebvre @sylefeb

over 4 years ago

Great achievement and very interesting write up: https://t.co/yAvXdHX71b ; just read the rendering part. Great to see the use of column display lists (column draw calls in the #doomchip on-ice GPU follow from a similar analysis). Part on data compression looks very promising too!

graham sanderson

@kilograham5

over 4 years ago

Happy Pi Day! #RP2040 #Doom is here with the FULL DOS game experience 320x200 VGA, 9 channel music, sound effects, 1-4 players (I2C), USB keyboard, saved games, cheats, demos, all cut/end screens Fits all 9 shareware levels on 2M @RaspberryPi Pico! https://t.co/nT0cjIZkGs 1/4

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Sylvain Lefebvre @sylefeb

over 4 years ago

#Silice FireV now runs on #LiteX, but does it run Doom? Of course it does. (using @BrunoLevy01 excellent LiteX port, on @RadionaOrg #ulx3s). Intriguing: the FireV is usually the #doomchip Doom-demon. So this is the Doom-demon running Doom?!? Well ... yes (side note: its slooow)

sylefeb's tweet photo. #Silice FireV now runs on #LiteX, but does it run Doom? Of course it does. (using @BrunoLevy01 excellent LiteX port, on @RadionaOrg #ulx3s).

Intriguing: the FireV is usually the #doomchip Doom-demon. So this is the Doom-demon running Doom?!? Well ... yes (side note: its slooow) https://t.co/YjlNM1bO13

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Sylvain Lefebvre @sylefeb

over 4 years ago

I've put the slides of my #doomchip talk online: https://t.co/0KEAAI3m2T (link to talk recording on first slide). If you are wondering what a GPU for #Doom 1993 could have looked like, or are simply interested in Computer Graphics 'from scratch' (on #fpga), check it out!

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Sylvain Lefebvre @sylefeb

over 4 years ago

Writing a README and releasing the gate simulation repo, unless I decide to have some fun on the #doomchip. Undecided yet 😃 (btw, had my share of Verilator core dumps -- a strange one was a linker issue, as I was pre-compiling parts of the framework ; don't!).

Flux @WillFlux

over 4 years ago

It's been a while since I've asked this, so... What are you doing for #FPGAFriday? I found a bug in my Verilator graphics sims, which led to a fix in Verilog, which led to a core dump, which uncovered another issue that had been lurking for years. Unexciting yet satisfying. 😊

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Sylvain Lefebvre @sylefeb

over 4 years ago

Doing your own GPU on an #fpga? Curious about perspective correct texture mapping? For my #doomchip talk I made a @shadertoy just to demonstrate why it matters and how it's computed: https://t.co/wHgfItcdYU

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Sylvain Lefebvre @sylefeb

over 4 years ago

4/ If you'd like to know more about the #doomchip on-ice, I gave a detailed talk at #rc3nowhere: https://t.co/YfDoyNQjOT

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Sylvain Lefebvre @sylefeb

over 4 years ago

Progress on sprites for the #doomchip on-ice! Finally found the time to solve the issues with sprites disappearing. (Doom recreation with a terrain on an #ice40 5K LUTs #fpga, written in #Silice)

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Sylvain Lefebvre @sylefeb

over 4 years ago

5/ The IceV Dual powers my #doomchip 'on ice', a Doom-Comanche crossover #fpga console project (running on @1bitsquared icebreaker), about which I gave a talk at #rc3nowhere. Talk is here: https://t.co/YfDoyNQjOT

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Sylvain Lefebvre @sylefeb

over 4 years ago

And of course more is coming for the #doomchip in 2022!! (below: #doomchip SDRAM-edition on the #ulx3s)

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Sylvain Lefebvre @sylefeb

over 4 years ago

1/ These past few days I have been quite silent ... there was Xmas of course, but I was also busy recording a talk for #rC3nowhere about the #doomchip!! The talk is online here (raw version): https://t.co/YfDoyNQjOT

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Sylvain Lefebvre @sylefeb

over 4 years ago

This makes me very happy, successfully simulating a #Silice design I had not touched since 11 months (full #doomchip on SDRAM, with an early @riscv design in it). I was a bit worried, Silice has evolved quite a bit since ;)

sylefeb's tweet photo. This makes me very happy, successfully simulating a #Silice design I had not touched since 11 months (full #doomchip on SDRAM, with an early @riscv design in it). I was a bit worried, Silice has evolved quite a bit since ;) https://t.co/KCPTEq7nUY

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Sylvain Lefebvre @sylefeb

over 4 years ago

Here we go again, making sprite tables for the #doomchip 'on-ice'! (I love sprite tables, especially those multi-view sprites). This is all done by #Silice Lua pre-processor from the original game data.

sylefeb's tweet photo. Here we go again, making sprite tables for the #doomchip 'on-ice'! (I love sprite tables, especially those multi-view sprites). This is all done by #Silice Lua pre-processor from the original game data. https://t.co/rOTeG1dGEa

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Sylvain Lefebvre @sylefeb

over 4 years ago

This #FPGAFriday evening I'm polishing the #doomchip 'on-ice'. This precision issue was quite terrible! It was due to the v coordinate interpolator using too few bits. Well, that's fixed!🥳Now, why is there a black line near the bottom?😓

sylefeb's tweet photo. This #FPGAFriday evening I'm polishing the #doomchip 'on-ice'. This precision issue was quite terrible! It was due to the v coordinate interpolator using too few bits.
Well, that's fixed!🥳Now, why is there a black line near the bottom?😓 https://t.co/vD2V9qA4GG

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Sylvain Lefebvre @sylefeb

over 4 years ago

Tonight I've been implementing collisions in the #doomchip 'on-ice'. This is all done in the #riscv firmware, quite relaxing after all these SPIflash adventures!

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Sylvain Lefebvre @sylefeb

over 4 years ago

#doomchip 'on-ice' version, closer look at the SPIflash QPI texture access for terrain rendering. The raycaster accesses alternatively the heightmap and colormap. Everything has to be precisely orchestrated. Here, using #GTKwave to view signals simulated with #icarusverilog.

sylefeb's tweet photo. #doomchip 'on-ice' version, closer look at the SPIflash QPI texture access for terrain rendering. The raycaster accesses alternatively the heightmap and colormap. Everything has to be precisely orchestrated. Here, using #GTKwave to view signals simulated with #icarusverilog. https://t.co/p70Y7otely

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Sylvain Lefebvre @sylefeb

over 4 years ago

Finally got to implement an inverted clock with ice40 #fpga DDR primitives for the #icebreaker #doomchip . Texturing from SPIflash got twice as fast, just like that! (now running continuous QPI at peak 50MHz) https://t.co/Pj7yHNLTIX

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