8086simu.cpp

#include <vector>
#include <iostream>
#include <fstream>
#include <string>
#include <cstdlib>
#include <cstdio>

#include "instruction.h"
#include "register.h"

using namespace std;

const unsigned memory_size = 64*1024; // because 64K is enough for every thing

int regs[14];
vector<char> memory(memory_size);
bool runing = true;

#include "cpu_run.h"

void run_file(const char * file_name)
{
    ifstream is;
    is.open(file_name, ifstream::in);
    if (is.bad())
    {
        printf("not good file: %s\n", file_name);
        exit(1);
    }
    char c;
    printf("load:\n");
    int i = 0;
    while (is.good()) {
        if (is.get(c))
        {
            if (is.good())
            {
                memory.push_back(c);
                if (i % 2)
                    printf("|%02X|\n",c&0xFF);
                else
                    printf("|%02X",c&0xFF);
            } else {
                break;
            }
        }
        i++;
    };
    // return;

    regs[IP] = 0;
    regs[CS] = 0;
    cpu_run();
}
int main(int argc, char const *argv[])
{
    static_assert(sizeof(char) == 1, "char is 8 bit");
    static_assert(sizeof(int)  >= 2, "int bigger than 16 bit");
    static_assert((int)(char)0xFF == -1, "char to int");
    run_file(argv[1]);
    return 0;
}