27 lines
758 B
C++
27 lines
758 B
C++
/**
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* @file GPIO.hpp
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* @brief Logical types for the YMF262 pin-control interface (used by GPIO policies).
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*/
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#ifndef GPIO_HPP
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#define GPIO_HPP
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/** @brief Logical activation state of a control line (CS, WR, IC...). */
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enum class State{
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ACTIVE, ///< Line asserted (the policy maps this to the correct electrical level)
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INACTIVE ///< Line deasserted
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};
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/** @brief Selects what the data bus carries (drives the A0 line). */
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enum class Port{
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DATA, ///< Bus carries a data value
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ADDRESS ///< Bus carries a register address
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};
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/** @brief Selects the register bank / array (drives the A1 line). */
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enum class Bank{
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BANK_0, ///< First register array
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BANK_1, ///< Second register array (OPL3 extended registers)
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};
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#endif |