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67 lines
1.4 KiB
C++
67 lines
1.4 KiB
C++
//
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// Z80.hpp
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// Clock Signal
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//
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// Created by Thomas Harte on 14/05/2017.
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// Copyright © 2017 Thomas Harte. All rights reserved.
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//
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#ifndef Z80_hpp
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#define Z80_hpp
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#include <cstdint>
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namespace Z80 {
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/*
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The list of registers that can be accessed via @c set_value_of_register and @c set_value_of_register.
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*/
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enum Register {
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ProgramCounter,
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StackPointer,
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A, Flags, AF,
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B, C, BC,
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D, E, DE,
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H, L, HL,
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ADash, FlagsDash, AFDash,
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BDash, CDash, BCDash,
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DDash, EDash, DEDash,
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HDash, LDash, HLDash,
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IXh, IXl, IX,
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IYh, IYl, IY,
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R, I,
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};
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/*
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Flags as defined on the Z80; can be used to decode the result of @c get_flags or to form a value for @c set_flags.
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*/
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enum Flag: uint8_t {
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Sign = 0x80,
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Zero = 0x40,
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Bit5 = 0x20,
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HalfCarry = 0x10,
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Bit3 = 0x08,
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Parity = 0x04,
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Overflow = 0x04,
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Subtract = 0x02,
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Carry = 0x01
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};
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/*!
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Subclasses will be given the task of performing bus operations, allowing them to provide whatever interface they like
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between a Z80 and the rest of the system. @c BusOperation lists the types of bus operation that may be requested.
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@c None is reserved for internal use. It will never be requested from a subclass. It is safe always to use the
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isReadOperation macro to make a binary choice between reading and writing.
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*/
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enum BusOperation {
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Read, ReadOpcode, Write, Input, Output, Interrupt, BusRequest, None
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};
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}
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#endif /* Z80_hpp */
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