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mkarlsson last won the day on March 30 2019

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About mkarlsson

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  1. See comment #3 that states that the MS Natural Keyboard 4000 does NOT work with the USB-to-PS/2 adapter.
  2. Most likely the problem is with the USB-to-PS/2 dongle. The simple passive USB-to-PS/2 dongle only works if the keyboard can switch to use PS/2 protocol. See Magnus
  3. mkarlsson


    ISE on Win10 is broken and wont work unless you takes a few steps. See this post:
  4. mkarlsson

    SRAM timing

    Looks like you have the polarity of /OE wrong - it should be high when writing and low when reading. Magnus
  5. mkarlsson

    Unable to program FPGA on Duo

    No need to use the Oracle VM to run ISE on Win10, just follow these steps: 1) Install ISE14.7 for Windows (Embedded Edition) on your Win10 computer 2) Go to C:\Xilinx\14.7\ISE_DS\ISE\lib\nt64 (assuming 64-bit Win10) and rename libPortability.dll to libPortability_orig.dll 3) Make a copy of libPortabilityNOSH.dll and rename it libPortability.dll 4) Go to C:\Xilinx\14.7\ISE_DS\EDK\lib\nt64 and rename libPortability.dll to libPortability_orig.dll 5) Copy libPortability.dll from C:\Xilinx\14.7\ISE_DS\ISE\lib\nt64 to C:\Xilinx\14.7\ISE_DS\EDK\lib\nt64 6) Run ISE and install your license file etc. You should now have a working version of ISE on your Win10 computer. Magnus
  6. mkarlsson

    Place:1108 in a XC6SLX16-CSG324

    Here is the problem - you take the signal from the button connected to pin C4 and use that as a clock for the ledst0 flip-flop. This is not how you use an FPGA. Pin C4 is not a clock input pin, which cause the error 1108 you see, and logic signals like btnl should not be used as a clock. FPGAs are intended to be used for synchronous logic designs where a large number of flip-flops are clocked with a common clock. In order to make this possible the clock is distributed to all the flip-flops in this clock domain using special clock buffers and clock networks. The source of the clock is typically coming from an input pin on the FPGA and only a select few pins can be used as clock input. The input clock can be used as is or can be feed to a clock management tile that has resources like PLLs and DCMs that allow you to create a clock with different clock frequency. The Nexys3 board has a 100 MHz clock input signal connected to pin V10 that can be used as system clock. This is what the Nexys3 manual states: Try this code instead: .ucf file: BTW, your switch might "bounce", so you might have to de-bounce the signal from the switch. See What is debouncing? Magnus
  7. mkarlsson

    Changing the clock frequency

    No, the CMT can't do that. If some part of the logic needs to advance at a slow rate, the common way to do that is to use a clock-enable signal, i.e. clock the logic with the system clock (say 32 MHz) and then generate a clock-enable signal using a counter (in your case a 23-bit counter) that resets at the period you want (in your case at 6399999). The clock-enable signal is true when the counter is at the max value (in your case 6399999) and is used to qualify the clocking of the slow circuit. Hope this helps
  8. mkarlsson


    Cool! Yeah, winter is Sweden is not for the faint. As for Arty, I do have one too, and to make it a bit more useful I designed a pmod add-on board with the stuff missing compared to Pipistrello.
  9. mkarlsson


    Most issues now fixed, like intro music and intermission music. Complete project can be downloaded here: Doom first level video (youtube)
  10. mkarlsson


    Got the OPL2 integrated into the Doom project. Still a few rough edges but getting close... Doom on FPGA board (youtube)
  11. mkarlsson


    Well, I do have a github account but have been bad at updating it. The opl3 code for pipistrello can be downloaded here: The latest doom bitfile for pipistrello is here: The latest doom c source code is here: Without support for Spartan6 in Vivado and no more updates for ISE, the old Spartan6 boards are unfortunately getting obsolete, and with the subsidized pricing of the Digilent Arty boards etc. there is very little incentive for me to develop Artix7-based replacement boards Kalmar is a nice place with a castle and all. We have an apartment in Örebro that we use as a home base in Sweden.
  12. mkarlsson

    SoundBlaster FM HDL

    I think I nuked too many files in the ipcore_dir folder for it to compile so I just downloaded the whole project again, this time with all the files. If you have problems building it just re-download the zip file. Magnus
  13. mkarlsson

    SoundBlaster FM HDL

    Here is a video of it running on a Pepino LX9 board: If you have a Pepino LX9 board and want to try it, here is how: Download the zip file and unzip it somewhere Place the files in the dro directory on a micro-sd card and put it in the sd-card socket on Pepino Open up a terminal (like Putty) at 115200 baud connected to the Pepino board Load or flash the bitfile opl2player.bit in the opl2player director At the promt on the terminal, enter the name of the dro-file you want to play (it will loop forever). Stop it by entering S. BTW, the code should work on a Papilio Pro by modifying the .ucf file to match the pins for the sd-card and audio wings and re-synthesize. Magnus
  14. mkarlsson

    SoundBlaster FM HDL

    Bringing this old thread back to life... In my quest to get a fully working version of Doom (including music) running on Pipistrello I found Greg's OPL3 project and decided to port it to Verilog as he mentioned above, and got it running on Pipistrello, as well as an OPL2 version running on Pepino LX9 (100% of slices occupied!). It uses a Microblaze_mcs processor with 32K ram to play .dro files. Here is a link to a zip file with the Pepino_lx9 project (including Verilog sources and a simple dro-file player): Video of it running on Pipistrello: Cheers, Magnus
  15. mkarlsson


    Hi Alex, long time no hear.. I made the opposite trip some 30 years ago (Sweden to US) but still have my roots there and go back several times a year (actually going there this coming Wednesday). I finally got around to work on one of my old projects that I left unfinished - Doom running on Pipistrello. The project was based on a port of Chocolate Doom to the NIOS soft processor by two guys from Finland and I got it to sort of work but had not realized how much they had sacrificed to get it to work on NIOS. The sound system was completely hacked up (8 channel stereo sound effects cut down to a single mono channel with no volume control) and the game crashed at the end of the first level due to non-implemented stuff. So I put back the original code from Chocolate Doom so the game worked and got the full sound system working by porting over the sound mixing from the Linux version of doom. I also added mouse support so the game is now really playable. The only thing really missing now is to play the music tracks. They were implemented in a format similar to MIDI and played on DOS via an OPL2 or OPL3 chip found on some sound cards. I looked around I found that Greg Taylor had done a clone of OPL3 using systemVerilog running on a ZYBO board so I decided to try a port of that code to plain Verilog (since ISE do not support systemVerilog). After some stuggle (systemVerilog has some powerful features that are hard to replicate in Verilog) I got it to work - both the full OPL3 and cut-down version that only support the OPL2 features (Doom only use the OPL2 subset). The OPL2 version fits in an LX9 together with a Microblaze_mcs system. Here is a link to a video showing it running: Next thing is to incorporate it into the doom version. Cheers, Magnus