# PC/SC (smart cards) extension (optional)

- CMake option: FUN_WITH_PCSC=ON
- Purpose: Access smart card readers/cards via PC/SC (pcsclite).
- Homepage: https://pcsclite.apdu.fr/

Opcodes:
- OP_PCSC_ESTABLISH: returns context id (>0) or 0
- OP_PCSC_RELEASE: pops ctx id; returns 1/0
- OP_PCSC_LIST_READERS: pops ctx id; returns array of reader names
- OP_PCSC_CONNECT: pops reader, ctx id; returns handle (>0) or 0
- OP_PCSC_DISCONNECT: pops handle id; returns 1/0
- OP_PCSC_TRANSMIT: pops apdu, handle id; returns map with data/SW/rc

Notes:
- Requires PC/SC lite development headers/libs.
- Behavior and availability depend on platform and reader drivers.