If you want to use it like main memory, you need to use a pin-hogging form of memory, but plenty of ST's ARMs support it (the F10x series includes at least some chips that do, see chapter 21 in reference manual). This would be a good way to blow away the memory limit in an Espruino++ - I think you include the memory on the board, so the pins aren't as costly as if they were broken out
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If you want to use it like main memory, you need to use a pin-hogging form of memory, but plenty of ST's ARMs support it (the F10x series includes at least some chips that do, see chapter 21 in reference manual). This would be a good way to blow away the memory limit in an Espruino++ - I think you include the memory on the board, so the pins aren't as costly as if they were broken out