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  1. Hi, You can find the example that blocks the...

    Hi,

    You can find the example that blocks the Teensy4.0 at startup (needs a button press) in my MAME port git project.

    https://github.com/Jean-MarcHarvengt/teensyMAME

    load teensyMAMEClassic2...
  2. hi Mike, About the SPI display you should use...

    hi Mike,
    About the SPI display you should use DMA mode on the T4 (and T3.6)
    There are various versions on the T4 forum but the one you can find in the MCUME project is derived from the one of Frank...
  3. I can provide you a sample but indeed, you could...

    I can provide you a sample but indeed, you could only warn the user as the stack usage for the remaining memory will be application dependent.
  4. That makes sense. Paul once indicated that the...

    That makes sense. Paul once indicated that the second 512KB was almost available for malloc at the exception of a library/driver using a bit of DMAMEM.
    My experience is that as soon an application...
  5. no, don't dream ;-) Only early 80ths classics...

    no, don't dream ;-)
    Only early 80ths classics are working (dig dug, moon patrol, pacman...). Even Xevious is problematic.
    The main issue is that Mame expands all GFXs to min 8bits per pixel in RAM...
  6. Hi Mike, So you are actually the person that did...

    Hi Mike,
    So you are actually the person that did the initial Atmega port but also the T3.6 with spi RAM. I indeed started from that version. I have a greetings section at the bottom of the page, I...
  7. https://github.com/Jean-MarcHarvengt...ster/README...

    https://github.com/Jean-MarcHarvengt...ster/README.md

    Here you can find few emulators that I ported to the teensy4. 8086 was one of them. You can try changing the HDD image for this particular...
  8. MAME (Multiple Arcade Machine Emulator) ported to Teensy4.0

    Initial port available soon.
    Only very basic classics as pacman, galaxian, galaga... (more fancy classics will require some serious redesign dur to lack of memory)
    No sound yet
    Picture will be...
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    Atari 520ST emulator on Teensy4.0

    MCUME multi-systems emulator has been upgraded to support Teensy4.0 and ST7789 Display.
    Now with Atari 520ST support (Motorola 68k core running full speed!)...
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    As promised, MCUME multi systems emulator updated...

    As promised, MCUME multi systems emulator updated to Teensy4.0 and ST7789.
    Now with Atari 520ST support (Motorola 68k core running full speed!)...
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    MQS sound is now ok. With pin10 mono (not using...

    MQS sound is now ok. With pin10 mono (not using pin 12). I am still interested to know how to disable fully MQS on pin 12 in case I would use MISO one day.
    I now soldered the SD using SDIO iso SPI....
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    Thanks for the tip. Mono sound is is enough. If I...

    Thanks for the tip. Mono sound is is enough. If I could use pin 10 only for audio (CS can be whatever pin) and disable MQS on pin 11.
    As soon the SPI init is called, MQS sound stops. I guess I need...
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    Thank you Manitou! I never noticed it was on the...

    Thank you Manitou! I never noticed it was on the card. It works also for me with the guitar sample. I thought it was on pin 2 (out2). You know if it can be reconfigured somewhere else. 10 and 12 are...
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    Hi Frank, Is the MQS output still supported in...

    Hi Frank,

    Is the MQS output still supported in the Audio library for the T4?
    On what pin does it output sound? I tried pin2 with 100uF (+ at pin 2 side), speaker in series to ground but I hear...
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    Sorry, just saw this link now:...

    Sorry, just saw this link now:
    https://www.pjrc.com/breakout-board-for-teensy-4-0/
    Thanks Paul.
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    Hi Kurt, Not sure if you tried yourself to...

    Hi Kurt,
    Not sure if you tried yourself to connect the 4pin SDIO at the bottom (8pins) to a micro SD.
    Could somebody help me to find the type of connector required for the SDIO pins, the one use...
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    Hi Paul, is the PWM audio output working in...

    Hi Paul,

    is the PWM audio output working in the Audio lib on the T4? I have a compilation error with the T4 but not with the T3.6?
    I am not familiar with using PWM as for audio output. Is there a...
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    Congratulations for the great job! Many people...

    Congratulations for the great job!
    Many people were waiting for this milestone.
    And I am really amazed by its price.
    Very competitive and unique for many points.

    I wish the T4 a very successful...
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    @manitou,@wmxz, Is there a way to specify the CS...

    @manitou,@wmxz,
    Is there a way to specify the CS when using uSDFS in SPI mode (audio board or when using the SD of the ili9341 display) iso the Sdio build-in pins? A bit like SD lib does?
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    If someone wants to try the emulators on the T4,...

    If someone wants to try the emulators on the T4, use teensyMCUME on https://github.com/Jean-MarcHarvengt
    Pinout file is included. For more details, use the doc in espMCUME. At the exception of...
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    Thanks, I had noticed that you could also use...

    Thanks, I had noticed that you could also use uSDFS with the SD card but when I tried it was not working. May be it is because of my card. I use to format it Fat on the Mac. I will try again when I...
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    I have tried USDFS with USB MSC library, it goes...

    I have tried USDFS with USB MSC library, it goes very well. I created a small app on the ILi9341 to browse files from USB and SD card (using Sdio connected of the break out board). For the SD file...
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    Talking back about the cache management, I also...

    Talking back about the cache management, I also had the issue using the SD card library to load content into OCRAM. I just wrap up the file.read in a custom function that reads in everything in...
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    Thanks for your advice Paul, it did help. I now...

    Thanks for your advice Paul, it did help.
    I now have a picture for the Atari520ST emulator port. I still miss 8K to allocate outside the OCRAM but I can now see how fast the T4 is compare to the...
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    I just received my T4b2 from Robin on Tuesday....

    I just received my T4b2 from Robin on Tuesday.
    Amazing form factor!
    Will the ribbon be provided in the final product too?

    The card was just on time to understand properly the pinout. So, no I...
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    Hi Paul, I don't think it is a bad idea. I...

    Hi Paul,

    I don't think it is a bad idea.
    I guess cached/uncached memory is independent of DTCM/OCRAM
    That would mean that data and DMA buffers can end up in static variables (at least 128K for...
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    I am using MacOS 10.13.6 with Arduino IDE 1.8.5....

    I am using MacOS 10.13.6 with Arduino IDE 1.8.5.
    I did not try if the behavior was different with another OS as the T3.6 is still recognized correctly. Only the T4 is giving issues.
    Thanks!
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    BTW, I have again the same issue with the T4. No...

    BTW, I have again the same issue with the T4.
    No serial port detected at usb plug in.
    Button pressed for 15 secs, red LED for few secs (intensive light)

    But after, no sign of live.
    short press...
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    Hi Kurt, My experience with the ILI9341 and...

    Hi Kurt,

    My experience with the ILI9341 and the T4 (and T3.6 BTW) is that it is nice to switch between DMA and non DMA mode within your application.
    As the ILI9341 has both SD card reader and...
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    It got resurrect. Thanks a lot!

    It got resurrect.
    Thanks a lot!
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    Hi Frank, hi Paul, I now ported all emulators...

    Hi Frank, hi Paul,

    I now ported all emulators from the T3.6 to the T4, with the I2C keyboard support.

    https://github.com/Jean-MarcHarvengt/teensyMCUME
    Code can be compiled for both targets.
    ...
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    Hi Paul, hi everyone! I have been silent for...

    Hi Paul, hi everyone!

    I have been silent for some time since I received my T4 beta board. I apologize for this...

    In a first time I did observe from far away the great job achieved by the team...
  33. Cool Thank you Robin! Still busy to port the...

    Cool Thank you Robin!
    Still busy to port the building blocks to a new MCU, guess which one...;-)
  34. I moved the NES emulator to the NoFrendo emulator...

    I moved the NES emulator to the NoFrendo emulator core.
    It is running full speed with sound!
    At least it is possible to run 48k games on the TFT now. Unfortunately I miss some memory for the VGA...
  35. Thanks Robin, that's cool to be on the main...

    Thanks Robin, that's cool to be on the main page...!
  36. Hi Frank, I was so inspired by your great work...

    Hi Frank,

    I was so inspired by your great work that I decided to port part of your code to my latest project.
    I hope you have no objection.
    https://github.com/Jean-MarcHarvengt/espMCUME
    Via...
  37. Not as nice as your Teensy64 !! BTW, I always...

    Not as nice as your Teensy64 !!
    BTW, I always have a some disturbances on the VGA output...I am not sure if it is because the ILI9341 is disturbing the DMA/timer used for the VGA or something else....
  38. https://github.com/Jean-MarcHarvengt/TeensyCEC/blo...

    https://github.com/Jean-MarcHarvengt/TeensyCEC/blob/master/README.md
  39. [Posted] Atari 400/800 and 5200 emulator on Teensy 3.6

    2 new ported emulators...
    Once more with VGA and TFT support, sound and keyboard!
    https://youtu.be/CWJx-6N6_T4
    https://youtu.be/ICLHu_ZchQA
  40. Some videos: zx80 emulation: ...

    Some videos:
    zx80 emulation:
    https://youtu.be/yJ5W836Fotc
    zx81 emulation:
    https://youtu.be/tJCXZfJBch8
    https://youtu.be/mqkkq5ythQo
  41. Some videos: https://youtu.be/8kClavo3EOw...

    Some videos:
    https://youtu.be/8kClavo3EOw
    https://youtu.be/AmJvWGShbAc
  42. [Posted] ZX Spectrum Emulation on a Teensy 3.6 Microcontroller

    ZX Spectrum emulator with keyboard and YM/Buzzer sound support
    https://github.com/Jean-MarcHarvengt/TeensyCEC/blob/master/README.md
  43. [Posted] ZX80/ZX81 Emulation on a Teensy 3.6 Microcontroller

    ZX80/ZX81 emulator with keyboard, sound and hires modes support (ILI TFT and VGA out)
    https://github.com/Jean-MarcHarvengt/TeensyCEC/blob/master/README.md
  44. for the one interested in ZX spectrum emulation,...

    for the one interested in ZX spectrum emulation, I now added support for a custom I2C keyboard with 40 keys
  45. No, sorry for the confusion indeed...

    No, sorry for the confusion indeed...
  46. ZX spectrum core added

    ZX spectrum core added
  47. now added the support for Nintendo NES 32k games...

    now added the support for Nintendo NES 32k games in teensynes
  48. Did someone test the touch screen support code on...

    Did someone test the touch screen support code on the real Teensy64 hardware?
    https://github.com/Jean-MarcHarvengt/Teensy64

    In the meanwhile, I ported few other game console emulators (on my...
  49. [Posted] TeensyCEC: The teensy 3.6 Console Emulators Collection

    A new project featuring few emulators running full speed on the teensy 3.6 with ILI9341 and VGA display
    - Atari2600, Colecovision and Odyssey currently supported
    - NES is on its way

    Visit the...
  50. Hi, I forked the project, now you can see the...

    Hi,

    I forked the project, now you can see the changes.
    (I hope it is ok for Frank)

    https://github.com/Jean-MarcHarvengt/Teensy64/tree/master/Teensy64

    You might have some compilations error...
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