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https://github.com/ArthurFerreira2/puce65c02.git
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89 lines
2.6 KiB
C++
89 lines
2.6 KiB
C++
/*
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puce65c02, a WDC 65c02 cpu emulator, based on puce6502 by the same author
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Last modified 1st of July 2021
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Copyright (c) 2021 Arthur Ferreira (arthur.ferreira2@gmail.com)
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions :
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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#ifndef _PUCE65C02_H
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#define _PUCE65C02_H
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#include <cstdint>
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typedef enum {run, step, stop, wait} status;
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#define CARRY 0x01
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#define ZERO 0x02
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#define INTR 0x04
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#define DECIM 0x08
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#define BREAK 0x10
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#define UNDEF 0x20
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#define OFLOW 0x40
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#define SIGN 0x80
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class puce65c02 {
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public:
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unsigned long long int ticks;
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// private:
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status state;
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uint16_t PC; // Program Counter
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uint8_t A, X, Y, SP; // Accumulator, X and y indexes and Stack Pointer
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union {
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uint8_t byte;
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struct {
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uint8_t C : 1; // Carry
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uint8_t Z : 1; // Zero
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uint8_t I : 1; // Interupt disabled
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uint8_t D : 1; // Decimal
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uint8_t B : 1; // Break
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uint8_t U : 1; // Undefined
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uint8_t V : 1; // Overflow
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uint8_t S : 1; // Sign
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};
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} P; // Processor Status
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public:
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puce65c02() { ticks = 0; RST(); }
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puce65c02(uint16_t address) { ticks = 0; RST(); PC = address; }
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~puce65c02();
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uint16_t getPC() { return PC; };
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void setPC(uint16_t address) { PC = address; };
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void RST();
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void IRQ();
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void NMI();
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uint16_t exec(unsigned long long int cycleCount);
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#if __TESTS__
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void dasm(uint16_t address);
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void printRegs();
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int getRegs(char* buffer);
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int getCode(uint16_t address, char* buffer, int size, int numLines);
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#endif
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};
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#endif
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