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About rpflaum

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  1. rpflaum

    USB controller / wing

    Please share the OV7670 controller+USB also Thanks
  2. rpflaum

    J1 Forth CPU on Papilio Duo

    I would be interested in participating in a sub -forum on the J1 on Duo
  3. rpflaum

    J1 Forth CPU on Papilio Duo

    Hi James, I would like to give the J1 a spin. Thanks for your work on thus and Gameduino Bob
  4. rpflaum

    generic development board thoughts

    Jack, I think there is a lot to like about the LinkSprite board. It would be a good base to start from. I certainly would like to help support this effort by buying some if you put them up in the store. FPGA modules ( Xilinx and Altera) would be a good place to start to expand the idea. Let us know how we can help! Bob
  5. rpflaum

    generic development board thoughts

    @nilrods, I had no technical problems with the butterfly board. I thought the modular approach was the way to go. I still believe that modularity is a good way to go. As has been said it would certainly help keep down the number of boards one collects because of of being able to mix and match various peripheral circuits with the core FPGA and being able to upgrade the core when appropriate. I think Jack has done a fine job supporting the peripherals and would like to see an approach to make the core modular as well. Once again , I thank Jack for all he has done to support the community and look forward to being able to continue supporting him in his efforts. TrapperBob
  6. rpflaum

    generic development board thoughts

    Some of us who have the modular Butterfly Platform boards beg to differ. There were not enough of us though! Countinued thanks for your thoughtful designs and efforts Jack. We are behind you! TrapperBob
  7. rpflaum

    My DUO arrived today

    I received mine o\n Saturday.
  8. rpflaum

    Project Oberon on Papilio Pro?

    Magnus, Is this SRAM wing something you will be offering on your site for sale? TrapperBob
  9. rpflaum

    The next generation Papilio - help me shape it.

    Jack, I would love to work with one of the prototypes! Bob
  10. rpflaum

    SDRAM controller with consistent access time?

    What is typically done is to use a dcm to introduce a controlled phase shift/delay in the clock used in the output registers before sending it out of the fpga as the sdram clock. This dcm is fine-tuned to match the delays to get the proper setup and hold times.
  11. rpflaum

    SDRAM controller with consistent access time?

    Alex, I would answer yes to this offer!! "If anyone is keen I can make the entire zipped up project available (very small size)" Thanks Bob
  12. rpflaum

    The next generation Papilio - help me shape it.

    Black soldermask has exhibited process reliability issues reported by numerous sources
  13. rpflaum

    HDMI Wings

    Jack, have time to do some testing but not sure of timing to be on Skype. Please let me know how I can help. Bob
  14. rpflaum

    New to this tech.

    Puskyer, I took a look at the repository for zx_spectrum_48k_papilio_VGA : In the readme file it mentions "zx_spectrum_48k_papilio_VGA : for Papilio Pro with Arcade MegaWing. Because the external DRAM of the Papilio Pro is not used and there is not enough RAMB internal to the FPGA, this configuration of Spectrum only has 32K RAM. To do so, and in order for the project to synthesize, in file ram.v change reg [7:0] sram [0:32767]; to reg [7:0] sram [0:16387]; " Maybe this is the issue you are running into. It appears from your log that it is not finding enough sites(slices with FF) in the FPGA to put together the memory needed.
  15. Alex, I would have interest in following that!!