billautomata

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About billautomata

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  1. billautomata

    looking to contribute, also some questions (vga, audio, general)

    that's great about skype, thanks for the information! I'm going to be gone all week, but when I come back I am going to be supercharged to help write documentation and example programs.
  2. billautomata

    looking to contribute, also some questions (vga, audio, general)

    I'm going to EyeO Festival (http://eyeofestival.com/) tomorrow. On Wednesday, during the lunchtime show and tell, I'm going to do an animated slideshow presentation using the Papilio One 500k running ZPUino, about how great the PapilioOne and the ZPUino is. I'll post pictures when I get back. =) I run linux, so no skype for me. I'll see how it runs in a windows VM.
  3. billautomata

    VN VGA Controller

    I'm going to try this weekend on my 500k, I'll give you the results. Looking through the example pde has me excited.
  4. billautomata

    looking to contribute, also some questions (vga, audio, general)

    Seems like big VGA operations are not allowed, and the move functions are preferred. What else should I stay away from? I'm having trouble testing if too many draws per horizontal line causes flicker... I see in the VHDL it operates at a specific Hz, I'm going to see what I can do with a timer based interrupt.
  5. billautomata

    looking to contribute, also some questions (vga, audio, general)

    Sounds great! Is there some sort of standard practice that I am not aware of regarding getting good video performance? I have a fun little nBody simulation going but there is some serious flicker. Do VGA draw commands happen asynchronously from the CPU itself? What could I do to correct the tearing?
  6. billautomata

    looking to contribute, also some questions (vga, audio, general)

    my first documented project is going to be a sequencer/synth that uses the YM2149. I can easily find documentation about the use of the registers on the yamaha chip, but I can't find anything about how to use/address the SID that is said to be in the .bit file.
  7. This is really fantastic, I have tried a number of VGA boards and the papilio 500k running the ZPUino seems to be the ideal solution for me getting into VHDL and fpga technology. While the ISE downloads I have a ton of questions. A little backstory, I'm an artist that makes interactive installations using projectors and computers with hefty gpus hooked up to external interfaces (usually arduino driven) all running under a few processing or openframeworks applcations managing everything. I do a lot of interactive scientific simulations with physics engines and particle systems. It's great, and everyone loves the big openGL monsters I create, but there is a problem in that I cannot sell these things when people inevitably ask me to buy it. I can't reasonably sell someone my computer lab they see dragged into the gallery. My goal is to create a standard rig, much like the papilio 500k + arcadewing, that I can create external analog or digital controls, write some cool software, and end up with a plug and play rich media installation where no laptop is involved. I plan on sitting down with my freshman EE digital design textbook, the zpuino-HDL, and try to build a modified custom .BIT file to load with the papilio loader. Questions:: Where can I find documentation about the 8bit 160x120 vga controller? While going through the zetris and jsw code I see calls to REGISTER(VGABASE,4) macros. I have a strong C background and I know my fair share of java, but we are closer to the metal than I usually get. It seems if I want to do a VGA sync so I lose the flicker I get when I draw to the screen I would mask some bits into a register just right and I would get the desired behavior out of the hardware (ex. wait until previous draw command completed). I seem to be able to use the values of registers in my code as if they were integers. Is my understanding accurate? How exactly does the VHDL code and the compiler interface like that? Where can I find the list of the behaviors of the registers? Would I cross reference the memory addresses called in zpuino.h and registers.h with the VHDL code for those modules? Where can I find this information about the behavior of the SID or YM2149 modules? I have what I have gathered from zetris and jsw, but I'd love the entire reference. I'm looking to contribute to this project. I'm really impressed with what I have seen so far, and I would love to write documentation and tutorials while I learn the more advanced concepts.