2 Homebrew Z80 TV GAME SYSTEM Emulator 'eZ80TVGAME'
4 Author : Takeda.Toshiya
10 // http://w01.tp1.jp/~a571632211/z80tvgame/index.html
16 #define SET_BANK(s, e, w, r) { \
17 int sb = (s) >> 12, eb = (e) >> 12; \
18 for(int i = sb; i <= eb; i++) { \
22 wbank[i] = (w) + 0x1000 * (i - sb); \
27 rbank[i] = (r) + 0x1000 * (i - sb); \
32 void MEMORY::initialize()
34 memset(rom, 0xff, sizeof(rom));
35 memset(rdmy, 0xff, sizeof(rdmy));
38 SET_BANK(0x0000, 0x7fff, wdmy, rom);
39 SET_BANK(0x8000, 0xdfff, ram, ram);
40 SET_BANK(0xe000, 0xffff, wdmy, rdmy);
47 memset(ram, 0, sizeof(ram));
50 void MEMORY::write_data8(uint32_t addr, uint32_t data)
53 wbank[addr >> 12][addr & 0xfff] = data;
56 uint32_t MEMORY::read_data8(uint32_t addr)
59 return rbank[addr >> 12][addr & 0xfff];
62 void MEMORY::open_cart(const _TCHAR* file_path)
64 FILEIO* fio = new FILEIO();
66 if(fio->Fopen(file_path, FILEIO_READ_BINARY)) {
67 memset(rom, 0xff, sizeof(rom));
68 fio->Fread(rom, sizeof(rom), 1);
75 void MEMORY::close_cart()
77 memset(rom, 0xff, sizeof(rom));
81 void MEMORY::draw_screen()
84 emu->set_vm_screen_lines(210);
86 scrntype_t col_w = RGB_COLOR(255, 255, 255);
89 emu->set_vm_screen_lines(210);
90 for(int y = 0, offset = 0x403c; y < 210; y++, offset += 30) {
91 scrntype_t* dest = emu->get_screen_buffer(y) - 30;
92 // (30 * 8 - 176) / 2 = 32
93 for(int x = 32; x < 240 - 32; x++) {
94 uint8_t val = ram[offset + (x >> 3)];
95 uint8_t bit = 1 << (x & 7);
96 dest[x] = (val & bit) ? col_w : col_b;
101 #define STATE_VERSION 1
103 bool MEMORY::process_state(FILEIO* state_fio, bool loading)
105 if(!state_fio->StateCheckUint32(STATE_VERSION)) {
108 if(!state_fio->StateCheckInt32(this_device_id)) {
111 state_fio->StateArray(ram, sizeof(ram), 1);
112 state_fio->StateValue(inserted);