cpu_8080.h

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#ifndef CPU_8080_H
#define CPU_8080_H
 
#include <inttypes.h>
#include "memory_8080.h"
 
#define UNUSED __attribute__((unused))
 
typedef struct {
    uint8_t carry;  
    uint8_t aux;    
    uint8_t sign;   
    uint8_t zero;   
    uint8_t parity; 
} program_status_word;
 
typedef enum {
    SIGN_FLAG   = 1 << 0,
    ZERO_FLAG   = 1 << 1,
    AUX_FLAG    = 1 << 3,
    PARITY_FLAG = 1 << 5,
    CARRY_FLAG  = 1 << 7,
} flag_bits;
# define ALL_BUT_AUX_FLAG (SIGN_FLAG | ZERO_FLAG | PARITY_FLAG | CARRY_FLAG)
 
typedef enum {
    NZ_check    = 0x0, 
    Z_check     = 0x1, 
    NC_check    = 0x2, 
    C_check     = 0x3, 
    PO_check    = 0x4, 
    PE_check    = 0x5, 
    P_check     = 0x6, 
    M_check     = 0x7, 
} condition_flags;
 
typedef struct {
 
    union{
        struct {
            uint8_t C;      
            uint8_t B;      
            uint8_t E;      
            uint8_t D;      
            uint8_t L;      
            uint8_t H;      
        };
        struct {
            uint16_t BC;    
            uint16_t DE;    
            uint16_t HL;    
        };
    };
    // TODO: Add The memory ref reg 6!?
    uint8_t ACC;                
    program_status_word PSW;    
 
    uint16_t SP;    
    uint16_t PC;    
    uint8_t intt;    //(Don't know if works)
    uint8_t pend_intt; 
 
 
    uint8_t (*IN_Func)(uint8_t);
    void (*OUT_Func)(uint8_t, uint8_t);
 
 
    v_memory mem; 
    uint16_t rom_size; 
    uint8_t halt; 
} cpu_state;
 
cpu_state* init_cpu_8080(uint16_t pc, uint8_t (*in_cb)(uint8_t), void (*out_cb)(uint8_t, uint8_t));
 
int exec_inst(cpu_state* cpu);
 
int decompile_inst(cpu_state* cpu, uint16_t* next_inst);
 
void io_machine_OUT(uint8_t port, uint8_t data);
 
uint8_t io_machine_IN(uint8_t port);
 
void print_state(const cpu_state cpu);
 
#endif