Coldcard Internal Documentation

These docs are meant for you hackers out there... but also for anyone who wants to understand why it's safe to put your moneys into Coldcard.

pin-entry.md Huge and detailed discussion of PIN codes and the security element that holds the secrets.
dev-access.md How developers can modify Coldcard to extend it.
memory-map.md Memory map highlights
backup-files.md Some details of our encrypted backup files.
electrum-usage.md Importing seed words into Electrum for funds usage (and other tips).
bitcoin-core-usage.md How to use with Bitcoin Core.
limitations.md Documented limitations, policy choices, and TODO items.
paperwallet.pdf Example paper wallet template file.
seed-xor.md More about Seed XOR feature, including fully worked Seed XOR example, and useful XOR lookup chart.
menu-tree.txt Dump of the menu system. Incomplete, may be out of date.
nfc-coldcard.md NFC Specification for COLDCARD interoperability.