main.c

#include "fxcg\display.h"
#include "fxcg\keyboard.h"
#include "fxcg\rtc.h"
#include "fxcg\file.h"
#include "keyboard_syscalls.h"
#include "string.h"
#include "stdint.h"
#include "stdlib.h"
#include "ctype.h"
#include "math.h"
#include "stdio.h"

int clock_m = 0, clock_t = 0;
int r_a = 0, r_b = 0, r_c = 0, r_d = 0, r_e = 0, r_h = 0, r_l = 0, r_f = 0, r_pc = 0, r_sp = 0, r_m = 0, r_t = 0, r_ime = 0, r_i = 0, r_r = 0;
int Z80_halt = 0, Z80_stop = 0;
int r_hl = 0;


const int MMU_bios[256] = {
    0x31, 0xFE, 0xFF, 0xAF, 0x21, 0xFF, 0x9F, 0x32, 0xCB, 0x7C, 0x20, 0xFB, 0x21, 0x26, 0xFF, 0x0E,
    0x11, 0x3E, 0x80, 0x32, 0xE2, 0x0C, 0x3E, 0xF3, 0xE2, 0x32, 0x3E, 0x77, 0x77, 0x3E, 0xFC, 0xE0,
    0x47, 0x11, 0x04, 0x01, 0x21, 0x10, 0x80, 0x1A, 0xCD, 0x95, 0x00, 0xCD, 0x96, 0x00, 0x13, 0x7B,
    0xFE, 0x34, 0x20, 0xF3, 0x11, 0xD8, 0x00, 0x06, 0x08, 0x1A, 0x13, 0x22, 0x23, 0x05, 0x20, 0xF9,
    0x3E, 0x19, 0xEA, 0x10, 0x99, 0x21, 0x2F, 0x99, 0x0E, 0x0C, 0x3D, 0x28, 0x08, 0x32, 0x0D, 0x20,
    0xF9, 0x2E, 0x0F, 0x18, 0xF3, 0x67, 0x3E, 0x64, 0x57, 0xE0, 0x42, 0x3E, 0x91, 0xE0, 0x40, 0x04,
    0x1E, 0x02, 0x0E, 0x0C, 0xF0, 0x44, 0xFE, 0x90, 0x20, 0xFA, 0x0D, 0x20, 0xF7, 0x1D, 0x20, 0xF2,
    0x0E, 0x13, 0x24, 0x7C, 0x1E, 0x83, 0xFE, 0x62, 0x28, 0x06, 0x1E, 0xC1, 0xFE, 0x64, 0x20, 0x06,
    0x7B, 0xE2, 0x0C, 0x3E, 0x87, 0xF2, 0xF0, 0x42, 0x90, 0xE0, 0x42, 0x15, 0x20, 0xD2, 0x05, 0x20,
    0x4F, 0x16, 0x20, 0x18, 0xCB, 0x4F, 0x06, 0x04, 0xC5, 0xCB, 0x11, 0x17, 0xC1, 0xCB, 0x11, 0x17,
    0x05, 0x20, 0xF5, 0x22, 0x23, 0x22, 0x23, 0xC9, 0xCE, 0xED, 0x66, 0x66, 0xCC, 0x0D, 0x00, 0x0B,
    0x03, 0x73, 0x00, 0x83, 0x00, 0x0C, 0x00, 0x0D, 0x00, 0x08, 0x11, 0x1F, 0x88, 0x89, 0x00, 0x0E,
    0xDC, 0xCC, 0x6E, 0xE6, 0xDD, 0xDD, 0xD9, 0x99, 0xBB, 0xBB, 0x67, 0x63, 0x6E, 0x0E, 0xEC, 0xCC,
    0xDD, 0xDC, 0x99, 0x9F, 0xBB, 0xB9, 0x33, 0x3E, 0x3c, 0x42, 0xB9, 0xA5, 0xB9, 0xA5, 0x42, 0x4C,
    0x21, 0x04, 0x01, 0x11, 0xA8, 0x00, 0x1A, 0x13, 0xBE, 0x20, 0xFE, 0x23, 0x7D, 0xFE, 0x34, 0x20,
    0xF5, 0x06, 0x19, 0x78, 0x86, 0x23, 0x05, 0x20, 0xFB, 0x86, 0x20, 0xFE, 0x3E, 0x01, 0xE0, 0x50
};

char MMU_rom[] = "";
int MMU_eram[8192];
int MMU_wram[8192];
int MMU_zram[127] = {};

int MMU_inbios = 1;
int MMU_ie = 0;
int MMU_if = 0;


int GPU_scrnwidth = 160;
int GPU_scrnheight = 144;
int GPU_scrndata[160 * 144 * 2];
int GPU_vram[8192];
int GPU_oam[160] = {};
int GPU_reg[] = {};
int GPU_tilemap[512][8][8] = {};

int GPU_objdatax[40] = {};
int GPU_objdatay[40] = {};
int GPU_objdatatile[40] = {};
int GPU_objdatapalette[40] = {};
int GPU_objdatayflip[40] = {};
int GPU_objdataxflip[40] = {};
int GPU_objdataprio[40] = {};
int GPU_objdatanum[40] = {};


int GPU_objdatasorted[40] = {};
int GPU_palettebg[4] = {};
int GPU_paletteobj0[4] = {};
int GPU_paletteobj1[4] = {};
int GPU_scanrow[160] = {};

int GPU_curline = 0;
int GPU_curscan = 0;
int GPU_linemode = 0;
int GPU_modeclocks = 0;

int GPU_yscrl = 0;
int GPU_xscrl = 0;
int GPU_raster = 0;
int GPU_ints = 0;

int GPU_lcdon = 0;
int GPU_bgon = 0;
int GPU_objon = 0;
int GPU_winon = 0;

int GPU_objsize = 0;

int GPU_bgtilebase = 0x0000;
int GPU_bgmapbase = 0x1800;
int GPU_wintilebase = 0x1800;

int getCode(char a){
    char AlphabetU[26] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
    char AlphabetL[26] = "abcdefghijklmnopqrstuvwxyz";
    int codes[26] = {65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90};
    for(int i = 0; i < 26; i++){
        if(AlphabetL[i] == a || AlphabetU[i] == a)
            return codes[i];
    }
    return 0;
}


int MMU_rb(int addr) {

    switch(addr&0xF000)
    {
      // ROM bank 0
      case 0x0000:
        if(MMU_inbios)
    {
      if(addr<0x0100) return MMU_bios[addr];
      else if(r_pc == 0x0100)
      {
        MMU_inbios = 0;
      }
    }
    else
    {
      return getCode(MMU_rom[addr]);
    }

      case 0x1000:
      case 0x2000:
      case 0x3000:
        return getCode(MMU_rom[addr]);

      // ROM bank 1
      case 0x4000: case 0x5000: case 0x6000: case 0x7000:
        return getCode(MMU_rom[addr]);

      // VRAM
      case 0x8000: case 0x9000:
        return GPU_vram[addr&0x1FFF];

      // External RAM
      case 0xA000: case 0xB000:
        return MMU_eram[addr&0x1FFF];

      // Work RAM and echo
      case 0xC000: case 0xD000: case 0xE000:
        return MMU_wram[addr&0x1FFF];

      // Everything else
      case 0xF000:
        switch(addr&0x0F00)
    {
      // Echo RAM
      case 0x000: case 0x100: case 0x200: case 0x300:
      case 0x400: case 0x500: case 0x600: case 0x700:
      case 0x800: case 0x900: case 0xA00: case 0xB00:
      case 0xC00: case 0xD00:
        return MMU_wram[addr&0x1FFF];

          // OAM
      case 0xE00:
        return ((addr&0xFF)<0xA0) ? GPU_oam[addr&0xFF] : 0;

          // Zeropage RAM, I/O
      case 0xF00:
        if(addr > 0xFF7F) { return MMU_zram[addr&0x7F]; }
        else switch(addr&0xF0)
        {
        }
    }
    }
    return 0;
};

#include "GPU.c"
#include "MMU.c"
#include "z80.c"

int main(){
    return 0;
}