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    I grab close to everything from Farnell Element...

    I grab close to everything from Farnell Element 14 ... here the french page with 536 ohm , you can get all quantity you want :)
    https://fr.farnell.com/w/search/prl/resultats?st=536+ohm

    But...
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    Yes Frank , the resistor value are the same when...

    Yes Frank , the resistor value are the same when you add more stage ( 1 x 536 and 1 x 270 ohm ).
    Just bad that i cant help for the VGA code on Teensy :) , i was more involved in STM32 in the past ,...
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    Hi Frank , this schematic is my R2R DAC for get...

    Hi Frank ,
    this schematic is my R2R DAC for get better colors.
    The original pin description is on Jean Marc Github for the VGA library here :
    https://github.com/Jean-MarcHarvengt/VGA_t4
    And the...
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    Hi Jean Marc :) Yea , 12bit VGA can be fun to...

    Hi Jean Marc :)
    Yea , 12bit VGA can be fun to try , but the thing with FlexIO without the right pins coming out will be tricky ;)
    I get one of the PMOD Digital Video Interface , as you probably...
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    Hi :) For HDMI it can be possible to use the...

    Hi :)
    For HDMI it can be possible to use the PMOD Digital Video Interface ...
    https://cdn.shopify.com/s/files/1/1069/4424/products/pmod-hdmi_1024x1024.jpg?v=1562216081

    You can get it here : ...
  6. Hi Jean Marc , I just fond out for audio , i...

    Hi Jean Marc ,
    I just fond out for audio , i activated the commented MQS in your code.
    But it was allot of noise , so i made a filter and now everything goes well ;)
  7. I forget to ask you about audio :) On github i...

    I forget to ask you about audio :)
    On github i read that you use MSQ for audio.
    Do you use MSQR , MSQL or both ?
    If i understand correctly , all i have to do is to connect a little audio amplifier...
  8. That's it :) on gameboy emulator :...

    That's it :)
    on gameboy emulator :
    myTimer.begin(vblCount, 40000); <--- i set it to 20000 and it's more like the expected speed :)
    VID_FRAME_SKIP 0x1 give a little boost too ....
    To test the...
  9. Hi , i tested some of the emulators , they are...

    Hi ,
    i tested some of the emulators , they are working up to one (.... problem.....) ,
    It seems that all emulators are slower than normal , can it be that the T41 is not set at 600Mhz ?
    In the...
  10. I found why it was not working correctly :) It...

    I found why it was not working correctly :)
    It was here ...


    #ifdef HAS_T4_VGA
    #define PIN_JOY2_A1X A3
    #define PIN_JOY2_A2Y A2
    #define PIN_JOY2_BTN 14
    #define PIN_KEY_USER1 22...
  11. Hi , i have do like you said and everything is...

    Hi ,
    i have do like you said and everything is working up to the joybut and the 3 user keys.(they work on a test sketch i have do just for testing the analog joy and the buttons).
    The Emulators...
  12. Hi , thanks for all this information's :) I use...

    Hi , thanks for all this information's :)
    I use the ILI9341 , so i will then not connect the MISO , TFT_RST will then be connected to VCC.
    For the user button that is conflicting with TFT_CS i will...
  13. Hello Jean Marc :) I just have a question...

    Hello Jean Marc :)

    I just have a question about pin-out when i want to use a SPI TFT LCD.
    As i see , the 2 user keys are in conflict with TFT_RST and TFT_CD , the I2S audio data pin is in...
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    Hi :) I have made your change , it's strange...

    Hi :)
    I have made your change , it's strange like this ... he he
    I check on wiki for the original Amiga res , it is :

    Games use less to get more colors , it's difficult to create a resolution...
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    Hi Jean Marc :) I found another screen for VGA...

    Hi Jean Marc :)
    I found another screen for VGA testing , now it's OK , the auto correction work and the left part of screen is finally filled :)
    On Amiga workbench , the bottom pixels are off...
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    Hello Jean Marc :) I'm back home and tested...

    Hello Jean Marc :)

    I'm back home and tested what you say , it change nothing for the drift to right.
    It's not just on emulator but generic , it do also the same with the demo program.

    I don't...
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    Hi Jean Marc , I have check your VGA driver but...

    Hi Jean Marc ,
    I have check your VGA driver but i have to admit ,the way it's done, it's too complex for me :D
    I have then test on STM32 for try to shift the screen to right , i don't have...
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    Just tested on Turrican , it work :D Image...

    Just tested on Turrican , it work :D
    Image quality is great , i just get some horizontal line sometimes , but actually i don't have sound that come out of the pcm5102 , i will check my connection...
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    Hi , I tested your last version from Github ,...

    Hi ,
    I tested your last version from Github , the mouse act correctly this time.
    Thanks :)
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    It's me again :) Just a question about the Amiga...

    It's me again :)
    Just a question about the Amiga and or ST emulator.
    Allot of games and apps use 2 or more disk (adf) , is it a way to have more than one adf disk file linked at start of the...
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    I think i found a bug with the mouse. When you...

    I think i found a bug with the mouse.
    When you click on a mouse button it release alone and not when you release the button yourself.
    The 2 mouse buttons act like that , i see this in amiga...
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    Hi , You where right , it was the 3 buttons ,...

    Hi ,
    You where right , it was the 3 buttons , as i used other buttons on this test board connection was inverted ,it was like the 3 buttons was constantly pressed , now everything is ok.
    Thanks ;)
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    Thanks for this information , Arduino output ,...

    Thanks for this information ,

    Arduino output , compiled as smallest code (it's in french)


    Le croquis utilise 1069568 octets (13%) de l'espace de stockage de programmes. Le maximum est de...
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    Hi Jean Marc ;) I'm back to home and finished...

    Hi Jean Marc ;)
    I'm back to home and finished the teensy test-board , i get your latest source and see you added the mouse , what is the pins to use for the mouse ?
    Actually the USB port got the...
  25. Hi ;) With the schematic it's allot easier to...

    Hi ;)
    With the schematic it's allot easier to see how everything is connected together :)
    But i see that you are using the pins D34 to D37 for the external joystick , this pins are connected to the...
  26. Are you going to use the PCM5102 for audio ? If...

    Are you going to use the PCM5102 for audio ?
    If yes , let me know , so i will look to add it on the new test board i have to do later this week :)
  27. Hi Jean Marc, Is it possible for you to made a...

    Hi Jean Marc,
    Is it possible for you to made a real schematic ?
    From the PCB it's not really easy to know the connection if we do it on a test board ;)

    Thanks.
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    Hi Jean Marc :) I will finish some code for my...

    Hi Jean Marc :)
    I will finish some code for my LCD Maximite 2 on STM32 first on this board ( https://www.waveshare.com/product/mcu-tools/development-boards/stm32-open/openh743i-c-package-b.htm ) and...
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    Hi Jean Marc :) I just tested your new lib , it...

    Hi Jean Marc :)
    I just tested your new lib , it work well.
    But i have to compile for 'smallest code' , in other mode they are more glitch in screen.
    640x480 is one of the mode that work at best...
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    Great to ear it finally work :) I have code...

    Great to ear it finally work :)
    I have code other project in that time (colour maximite 2 with 1024x600 LCD)
    Last code was : https://drive.google.com/file/d/1cuT6xqE7OqCBtNcQd_AwLePSVZRvaxpo/view...
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    Hi , to overcome the tiny 320x240 SPI LCD ,...

    Hi ,
    to overcome the tiny 320x240 SPI LCD , have you consider to use something like this chip ? :
    http://www.vlsi.fi/en/products/vs23s010.html
    I don't know the max res we can get but it's for...
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    Hi Jean Marc :) Any news on the project ? , i...

    Hi Jean Marc :)
    Any news on the project ? , i have work on some other project and hope you advance in your VGA problems ...
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    Hi , I finally made the drawfullpolygon , it...

    Hi ,
    I finally made the drawfullpolygon , it seem to work now :)
    Code is here :
    https://drive.google.com/file/d/1cuT6xqE7OqCBtNcQd_AwLePSVZRvaxpo/view?usp=sharing

    Cheers.
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    I just get my new scope :) I see that after the...

    I just get my new scope :)
    I see that after the last pixel from the last line you just wait 6 lines for the V front porch ... it have to be 11 (for 640 x 480) , the vsync itself is OK with 2 lines....
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    Hi , i continued with functions in VGA_T4 , now...

    Hi ,
    i continued with functions in VGA_T4 , now you can use polygon too :)
    draw_h_line , draw_v_line mod to accept negative length value.
    I will try to do a drawfilledpolygon but i got some...
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    What you explain with the 2D HW Block is like it...

    What you explain with the 2D HW Block is like it work on STM32F7xx / H7xx with the LTDC and DMA2D ;) ... but you need to have the corresponding pins available ...
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    Hi , I optimized the drawcircle , the test if...

    Hi ,

    I optimized the drawcircle , the test if pixels x,y was > to 0 is now useless because it's tested in drawpixel.
    The precalculed sin/cos and ABS declaration are now in VGA_t4.h , so they are...
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    With byte decomposed in 2 parts it will not be...

    With byte decomposed in 2 parts it will not be easy to resolve for the DMA.
    And use a little SPI LCD for Amiga emulator it's not the ideal way :)
    A SPI LCD with more resolution will become too slow...
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    I just found my Ellipse bug :) replace ...

    I just found my Ellipse bug :)

    replace
    rad2 = radius1;
    with
    rad2 = radius2;

    that's it :rolleyes:
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    Hi , i've found bug in VGA_T4 , i corrected it ,...

    Hi , i've found bug in VGA_T4 , i corrected it , that was the pixel who can go out the screen and it append some time a freeze from the T41. Now it's OK :)
    I made 2 new easy function :

    void...
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    Hi :) I just tested your new VGA_T4 lib , now...

    Hi :)
    I just tested your new VGA_T4 lib , now the 640x480 is perfect , it's just little blue but no more pixel shift ;)
    Your code is so far away from what i understand on T41 !! , where do you get...
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    Well , i'm not good enough with this MCU to tell...

    Well , i'm not good enough with this MCU to tell you if it's ok or not for triggering 2 FLEXIO with only one signal :)
    But for the FLEXIO3 it's sure that it will slow down everything without DMA....
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    I just got a stupid idea ... but not sure that's...

    I just got a stupid idea ... but not sure that's so stupid :) and go in a total reverse way than VGA ...
    As all this emulator emulate ooOOooOOooLD machines , and all this old (computer) have use PAL...
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    Pins 48 to 54 are in use for the PSRAM , so ,...

    Pins 48 to 54 are in use for the PSRAM , so , it's not possible to use them :)
    I have take a look at the LCDIF pins with the nxp pin tool , all what we need is on FLEXIO2 but some pins are not...
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    Some times ago , Bitluni made allot of test about...

    Some times ago , Bitluni made allot of test about VGA on ESP32 MCU.
    https://github.com/bitluni/ESP32Lib

    I compiled all timing and put them in a PDF that you can take here :...
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    Hi , I don't have try char actually , just have...

    Hi ,
    I don't have try char actually , just have try to have better image , it's like the FlexIO1 and FlexIO2 are shifted on 2 pixels , but i don't understand how all it's done ...
    If you have some...
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    Hi :) I was involved in the 1st Maximite and...

    Hi :)

    I was involved in the 1st Maximite and Colour Maximite , and was so to say my job to made and fix keyboard for some country.
    After that my work evolved and i was no more able to stay active...
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    The VGA Standard say to output vsync every...

    The VGA Standard say to output vsync every 16.6832mS that is 1000/16.6832 = 59.94Hz
    I don't have made any PCB here :o , i just take my 8 year old R2R VGA DAC PCB and fitted the some resistances that...
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    Hi :) I have now 640x480 full screen ,...

    Hi :)

    I have now 640x480 full screen , apparently the left black border was from reading empty memory (i think) , i shifted the start address from FlexIO memory start and the black band vanished ...
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    On my scope it measure 29.9Hz for the vsync (see...

    On my scope it measure 29.9Hz for the vsync (see the picture).
    And is bad that the DMA is too slow , will be good to see the max speed reach from the DMA at outputting FlexIO bytes.
    The 548x480...
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