To get around that limitation, all of the code is loaded into the microcontroller’s RAM. The downside is that you can’t access the Pico’s onboard flash when the chip is running that fast. ![]() The secret to getting it to work is the overclocking potential of the Pico, which he says has been pushed to 400 MHz for this particular application. had done something similar with FPGAs in the past, but the far cheaper and easier to work with Pi Pico makes this version particularly appealing. With the Pi Pico standing in for the original ROM, updating firmware takes a fraction of the time and doesn’t require you to actually disconnect any of the hardware. Which is why has come up with the PicoROM, a way to emulate a ROM chip using the Raspberry Pi Pico. ![]() ![]() Pulling the chip, flashing it, and sticking it back into the socket each time you change a line isn’t anyone’s idea of a good time. If you’ve ever worked on a system that loads its software from a ROM or EPROM, you know how much of a hassle it can be to make frequent changes to the code.
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