/**
 * @file GPIO.hpp
 * @brief Logical types for the YMF262 pin-control interface (used by GPIO policies).
 */
#ifndef GPIO_HPP
#define GPIO_HPP

/** @brief Logical activation state of a control line (CS, WR, IC...). */
enum class State{
    ACTIVE,     ///< Line asserted (the policy maps this to the correct electrical level)
    INACTIVE    ///< Line deasserted
};


/** @brief Selects what the data bus carries (drives the A0 line). */
enum class Port{
    DATA,      ///< Bus carries a data value
    ADDRESS    ///< Bus carries a register address
};

/** @brief Selects the register bank / array (drives the A1 line). */
enum class Bank{
    BANK_0, ///< First register array
    BANK_1, ///< Second register array (OPL3 extended registers)
};

#endif