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fixed tab alignment for better readability
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ArthurFerreira2 2021-07-07 19:56:19 +02:00 committed by GitHub
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2 changed files with 1165 additions and 993 deletions
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puce65c02.cpp
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puce65c02.h
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@ -1,6 +1,5 @@
/* /*
puce65c02, a WDC 65c02 cpu emulator, based on puce6502 by the same author puce65c02, a WDC 65c02 cpu emulator, based on puce6502 by the same author
Last modified 1st of July 2021 Last modified 1st of July 2021
Copyright (c) 2021 Arthur Ferreira (arthur.ferreira2@gmail.com) Copyright (c) 2021 Arthur Ferreira (arthur.ferreira2@gmail.com)
@ -10,7 +9,7 @@
in the Software without restriction, including without limitation the rights in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions: furnished to do so, subject to the following conditions :
The above copyright notice and this permission notice shall be included in The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software. all copies or substantial portions of the Software.
@ -24,17 +23,12 @@
THE SOFTWARE. THE SOFTWARE.
*/ */
/*
This version is slightly modified for reinette IIe, a french Apple IIe
emulator using SDL2 (https://github.com/ArthurFerreira2/reinette-IIe).
Please download the latest version from
https://github.com/ArthurFerreira2/puce65c02
*/
#ifndef _PUCE65C02_H #ifndef _PUCE65C02_H
#define _PUCE65C02_H #define _PUCE65C02_H
#include <cstdint>
typedef enum {run, step, stop, wait} status; typedef enum {run, step, stop, wait} status;
#define CARRY 0x01 #define CARRY 0x01
@ -46,45 +40,49 @@ typedef enum {run, step, stop, wait} status;
#define OFLOW 0x40 #define OFLOW 0x40
#define SIGN 0x80 #define SIGN 0x80
typedef struct Pbits_t {
uint8_t C : 1; // Carry
uint8_t Z : 1; // Zero
uint8_t I : 1; // Interupt disabled
uint8_t D : 1; // Decimal
uint8_t B : 1; // Break
uint8_t U : 1; // Undefined
uint8_t V : 1; // Overflow
uint8_t S : 1; // Sign
} Pbits;
class puce65c02 { class puce65c02 {
private: public:
uint16_t PC; // Program Counter
uint8_t A, X, Y, SP; // Accumulator, X and y indexes and Stack Pointer unsigned long long int ticks;
// private:
status state;
uint16_t PC; // Program Counter
uint8_t A, X, Y, SP; // Accumulator, X and y indexes and Stack Pointer
union { union {
uint8_t byte; uint8_t byte;
Pbits bits; struct {
} P; // Processor Status uint8_t C : 1; // Carry
uint8_t Z : 1; // Zero
uint8_t I : 1; // Interupt disabled
uint8_t D : 1; // Decimal
uint8_t B : 1; // Break
uint8_t U : 1; // Undefined
uint8_t V : 1; // Overflow
uint8_t S : 1; // Sign
};
} P; // Processor Status
public: public:
unsigned long long int ticks; puce65c02() { ticks = 0; RST(); }
puce65c02(uint16_t address) { ticks = 0; RST(); PC = address; }
status state;
puce65c02();
~puce65c02(); ~puce65c02();
uint16_t getPC() { return PC; };
void setPC(uint16_t address) { PC = address; };
void RST(); void RST();
void IRQ(); void IRQ();
void NMI(); void NMI();
uint16_t exec(unsigned long long int cycleCount); uint16_t exec(unsigned long long int cycleCount);
uint16_t getPC(); #if __TESTS__
void setPC(uint16_t address); void dasm(uint16_t address);
void printRegs();
int getRegs(char* buffer); int getRegs(char* buffer);
int getCode(uint16_t address, char* buffer, int size, int numLines); int getCode(uint16_t address, char* buffer, int size, int numLines);
#endif
}; };
#endif #endif