Loading a Program from SD card

Projects Programming
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Can anyone link to an example of loading a program from SD card..

This has been a basic thing in computing since DOS, but i never seen the comcept covered in Arduino Land, I want to run a code section, and when i run out of memory for that code section, or what to switch over to a new task, i just go to the disk and load in the new code section and keep on rolling... i mean we used to do this with the AppleIIE and 5.25 floppy drives back in the day...

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The architecture of the AVR processors does not allow running code from RAM, hence the only way to do what you want would be very clumsy - using a second processor to read the SD, burn that code to flash, and restart the AVR !

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what about ESP32?

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