Forum Rule: Always post complete source code & details to reproduce any issue!

Search:

Type: Posts; User: Jean-Marc

Page 1 of 3 1 2 3

Search: Search took 0.00 seconds.

  1. Replies
    11
    Views
    747

    Hi bloodline, Just discovered this mail thread...

    Hi bloodline,

    Just discovered this mail thread today.
    Nice project to restart an amiga emulator from scratch.

    I was also my dream to run an Amiga on the T4.0
    I had troubles to port UAE for...
  2. Replies
    1
    Views
    114

    Amiga emulation on Teensy 4.1

    Happy to share the initial code and the video of the UAE Amiga emulator running on the Teensy 4.1 + PSRAM.
    2MB chip ram and 4 MB fast ram now mapped on the PSRAM.
    Impressive performance of the...
  3. Replies
    783
    Views
    26,837

    Fantastic!!! Commodore amiga emulation working...

    Fantastic!!!
    Commodore amiga emulation working full speed now on the T4.1.
    No need to split the 512k memory in 2 parts to fit it with all pointers boundary issue...
    And I can even go for 1MB...
  4. Replies
    783
    Views
    26,837

    Michael, Thanks again! The ground pin was indeed...

    Michael,
    Thanks again! The ground pin was indeed the problem. Not the 3.3 v. The one on the corner is ok. not the one next to 3.3 v at opposite side.
  5. Replies
    783
    Views
    26,837

    Hi Michael and mjs513 I also have the same...

    Hi Michael and mjs513

    I also have the same white wire but no 3.3v there for me.
    Or the wire is not soldered properly or the side connected to the pin is the issue.
    Or may be ground is the issue...
  6. Replies
    783
    Views
    26,837

    Hi, I finally received the pre-sample last...

    Hi,
    I finally received the pre-sample last Thursday. This w-e I soldered the psram and the test went ok. Then I decided to solder the header pin and test my Amiga emulator port now running on the...
  7. Replies
    783
    Views
    26,837

    Hi Paul, Great job again! I think a lot of...

    Hi Paul,

    Great job again!
    I think a lot of people were waiting for a T3.6 form factor again.
    I am very impatient to experiment with the QSPI memory chip on that device...
    Any clue of the device...
  8. MSX2 emulation and mini-computer station with casing for the T4

    I updated the MCUME project with MSX1/2 emulation.
    I finally created a standalone version on the multi computer station, working on battery with keyboard.
    Tell me what you think about it!
    All...
  9. Great job!

    Great job!
  10. Replies
    26
    Views
    2,036

    That would be great and a valid reason for me to...

    That would be great and a valid reason for me to move to a larger pinout. I experimented with self made flex PCB to access bottom tracks of the T4. I was surprised how easy it was but at the end I...
  11. Replies
    26
    Views
    2,036

    I still did no perform the experiment suggested....

    I still did no perform the experiment suggested. Shame on me.

    Currently I use the PSRAM mainly as extra memory from where I mostly read.
    I write one time to it and then I only read from it (for...
  12. @Frank, thanks a lot for the library. You...

    @Frank, thanks a lot for the library.
    You implemented the T4.0 software reset function that many people were looking for.
    Great work!
  13. Replies
    26
    Views
    2,036

    it is indeed a not as fast as the specs indicates...

    it is indeed a not as fast as the specs indicates but it starts failing at higher clock frequency.
    Probably best to use Quad SPI mode as alternative. I don't know how to use it on the teensy. May be...
  14. Replies
    26
    Views
    2,036

    I meant 16 bytes + the 5 bytes overhead (1 com +...

    I meant 16 bytes + the 5 bytes overhead (1 com + 3 add + 1 wait) but still below 4us total (2.4us at 70MHz if I am correct)
  15. Replies
    26
    Views
    2,036

    Thanks a lot for the spec hidden detail but by...

    Thanks a lot for the spec hidden detail but by luck the current page size in the driver is 16 bytes.
    So it reads max 16bytes in an SPI transaction (always from a 16 Bytes page boundary, at 0, 16,...
  16. Replies
    26
    Views
    2,036

    Code is within every emulator but I created a...

    Code is within every emulator but I created a separate project at:
    https://github.com/Jean-MarcHarvengt/psramips6404
  17. More emulators ported to the derived project ...

    More emulators ported to the derived project
    Recently added PC engine, Gameboy, Sega Master System, Megadrive and AtariST using external a PSRAM module.....
  18. There are many on PC. I used Speccy the most...

    There are many on PC. I used Speccy the most known. Also nice FPGA projects.

    In meanwhile, I could ported more emulators to the Teensy 4.0 using a PSRAM module.

    Recently added PC engine,...
  19. Replies
    26
    Views
    2,036

    More emulators using the PSRAM module on the...

    More emulators using the PSRAM module on the Teensy 4.0.
    Next to PC engine now Gameboy, Sega Master System, Megadrive and AtariST are using it.
    I had to struggle a week with the SW before figuring...
  20. It will be a challenge as USB stack takes about...

    It will be a challenge as USB stack takes about 50KBytes. Will have to gain 50k ram for the emulator but nice project for Christmas holidays...

    In the meanwhile more emulators ported to Teensy4....
  21. Replies
    26
    Views
    2,036

    Here are few pictures of the T4+PSRAM piggy back...

    Here are few pictures of the T4+PSRAM piggy back and the PCB breaking board I created for the emulation project
    18157
    18158
    With both the ILI9341 + the SD card (from the ILI) on SPI0, I cannot go...
  22. Replies
    26
    Views
    2,036

    Hi, I tried on another setup where only the...

    Hi,

    I tried on another setup where only the ILI9341 (2.2") was connected on SPI0.
    I can reach 100MHz clock in DMA and I also did not notice any issue without DMA.
    This w-e I will create a PCB...
  23. Replies
    26
    Views
    2,036

    As I also have the SD card on the same bus as the...

    As I also have the SD card on the same bus as the display, the load is probably slightly different.
  24. Replies
    26
    Views
    2,036

    Thanks for the tip. My understanding from the...

    Thanks for the tip.
    My understanding from the post is that the ILI9341 was running at about 40MHz with the old limit.

    With the change I can set it up to 60MHz for the display and same for the...
  25. Should be doable. With a bit more memory, USB...

    Should be doable. With a bit more memory, USB midi could be used. I will put it on my TODO list. Resolution might be the biggest problem.
  26. Replies
    26
    Views
    2,036

    if I run the tool of Kurt I get: FlexRAM...

    if I run the tool of Kurt I get:

    FlexRAM section ITCM+DTCM = 512 KB
    Config : aaaaaaff
    ITCM : 110976 B (84.67% of 128 KB)
    DTCM : 377536 B (96.01% of 384 KB)
    Available for Stack:...
  27. Replies
    0
    Views
    675

    PC Engine emulation on Teensy4

    Now added PC Engine support in MCUME
    https://youtu.be/Ot9RgDMqdF4
  28. Replies
    4
    Views
    637

    I am not an expert of SMD soldering but I managed...

    I am not an expert of SMD soldering but I managed to solder it without any problem. I use flux. It helps a lot for me as I don't have specific equipment for SMD. No issue with MSL also.

    The PC...
  29. Replies
    26
    Views
    2,036

    PC Engine emulator, PSRAM experiment

    I would like to share my first experience using PSRAM (SPI RAM) on the Teensy 4.0.

    Few weeks ago I decided to port one more emulator core to my MCUME project....
  30. Replies
    4
    Views
    637

    I bought them at Electrodragon....

    I bought them at Electrodragon.
    https://www.electrodragon.com/product/2pcs-ipus-ips6404-iot-ram/
    The SMD package 3.3v version.
    I am from Belgium. It took 2-3 weeks.
    I ordered 8 and I got...
  31. What exactly happens if you compile for smallest...

    What exactly happens if you compile for smallest code size? Is all code remaining in Flash? So is it like every function was labeled PROGMEM? It typically free up RAM for me.
  32. Hi Paul, Talking about FlexSPI, anyone already...

    Hi Paul,
    Talking about FlexSPI, anyone already tried to mmap another SPI device as PSRAM, in another region. For the SPI flash, is every block/page read cached in the FASTRUN too?
  33. Replies
    4
    Views
    637

    MMAP an external SPI device on the T4.0

    I am currently experimenting with PSRAM on the Teensy 4.0.

    I finally got an IPS6404 (8MB RAM) working on the SPI2 bus of the Teensy4.0.
    Speed can still be improved but I am not using DMA transfer...
  34. Replies
    21
    Views
    1,976

    This is indeed the Arm7 procedure working on the...

    This is indeed the Arm7 procedure working on the T3.6 but not working on the T4.
    No progress so far.
  35. Replies
    179
    Views
    18,356

    For the teensy 5.0 for sure 2 full SPI busses...

    For the teensy 5.0 for sure 2 full SPI busses next to the on board uSD. One of the SPI could be pre-wired to smd pads where a psram could be optionally soldered.

    I would reconsider the flash...
  36. Not tried on the T3.5 (I don't have one) but it...

    Not tried on the T3.5 (I don't have one) but it now works on more platforms including the cheap and great Teensy4.0 allowing AtariST emulation

    https://github.com/Jean-MarcHarvengt/MCUME/
  37. Replies
    4,367
    Views
    529,383

    Great! Mjs513 posted some info in the Teensy4...

    Great! Mjs513 posted some info in the Teensy4 software restart thread. It seems that every attempt to restart the T4 results in a shutdown? Not clear what the reason is and if there is already a...
  38. Replies
    21
    Views
    1,976

    Same behaviour as with wdog sample of tonton81 I...

    Same behaviour as with wdog sample of tonton81 I had posted the question yesterday in the teensy beta thread, Tonton81 did react and will have a look later. Thanks to all.
  39. Replies
    4,367
    Views
    529,383

    Some correction, I see the callback message but...

    Some correction, I see the callback message but no reset occurs (monitor output greyed out)

    also you have to adapt the code for the macro WDOG_WCR_WT as below I guess else it does not compile...
  40. Replies
    4,367
    Views
    529,383

    Happy that you reacted and sorry for the...

    Happy that you reacted and sorry for the confusion.

    Again, my gall is to generate a reset of the T4 by software (reboot the same flashed image)
    I indeed tried your example on the Teensy4.0. I use...
  41. Replies
    4,367
    Views
    529,383

    Anyone know how to trigger a reset of the Teensy4...

    Anyone know how to trigger a reset of the Teensy4 in software?
    I tried WDOG but not clear where the WDOG would be locked during startup code (I don't see in the code)

    I also tried the arm v7...
  42. Replies
    21
    Views
    1,976

    SCB_AIRCR = 0x5FA0004; while (true) { ...

    SCB_AIRCR = 0x5FA0004;
    while (true) {
    ;
    }
    Also not working on the T4
  43. Replies
    21
    Views
    1,976

    I asso don't see why I would unlock the WDOG. I...

    I asso don't see why I would unlock the WDOG.
    I don't see it locked in startup code?
  44. Replies
    21
    Views
    1,976

    Also tried below procedure but no luck (see 1060...

    Also tried below procedure but no luck (see 1060 manual)

    *(volatile uint32_t *)0x400BC004 = 0xD928C520;
    while((*(volatile uint32_t *)0x400BC000 & (1UL<<11) )==0);
    *(volatile uint32_t...
  45. Replies
    21
    Views
    1,976

    I saw it also yesterday by accident. That does...

    I saw it also yesterday by accident.
    That does not work for me. The project is blocking the T4.
    I think it was developed for the T4beta1 using the 1052
  46. Replies
    21
    Views
    1,976

    Soft reboot on Teensy4.0

    Is there a way to trigger a reboot of the teensy 4.0 from the code? E.g. using watchdog? Anyone implemented it already?
  47. Play old Arcade Classics on the Teensy4.0

    I just published the video today:

    https://youtu.be/q_BFhx5OfPc
    https://youtu.be/MSNT9EDy8uM

    Visit the project here:
    https://github.com/Jean-MarcHarvengt/teensyMAME

    Sound yet to come...
  48. Source code published...

    Source code published
    https://github.com/Jean-MarcHarvengt/teensyMAME
    https://youtu.be/q_BFhx5OfPc
    https://youtu.be/MSNT9EDy8uM
  49. 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...
  50. 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...
Results 1 to 50 of 101
Page 1 of 3 1 2 3