source/src/vm/ys6464a/ys6464a.cpp

   1 /*
   2         SHINKO SANGYO YS-6464A Emulator 'eYS-6464A'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2009.12.30 -
   6
   7         [ virtual machine ]
   8 */
   9
  10 #include "ys6464a.h"
  11 #include "../../emu.h"
  12 #include "../device.h"
  13 #include "../event.h"
  14
  15 #include "../io.h"
  16 #include "../i8255.h"
  17 #include "../memory.h"
  18 #include "../pcm1bit.h"
  19 #include "../z80.h"
  20
  21 #include "display.h"
  22 #include "keyboard.h"
  23
  24 // ----------------------------------------------------------------------------
  25 // initialize
  26 // ----------------------------------------------------------------------------
  27
  28 VM::VM(EMU* parent_emu) : emu(parent_emu)
  29 {
  30         // create devices
  31         first_device = last_device = NULL;
  32         dummy = new DEVICE(this, emu);  // must be 1st device
  33         event = new EVENT(this, emu);   // must be 2nd device
  34
  35         io = new IO(this, emu);
  36         pio = new I8255(this, emu);
  37         memory = new MEMORY(this, emu);
  38 //      pcm = new PCM1BIT(this, emu);
  39         cpu = new Z80(this, emu);
  40
  41         display = new DISPLAY(this, emu);
  42         keyboard = new KEYBOARD(this, emu);
  43
  44         // set contexts
  45         event->set_context_cpu(cpu);
  46 //      event->set_context_sound(pcm);
  47
  48 //      pio->set_context_port_b(pcm, SIG_PCM1BIT_SIGNAL, 0x01, 0);
  49         pio->set_context_port_b(display, SIG_DISPLAY_PORT_B, 0xf0, 0);
  50         pio->set_context_port_c(display, SIG_DISPLAY_PORT_C, 0xf0, 0);
  51         pio->set_context_port_c(keyboard, SIG_KEYBOARD_PORT_C, 0xf0, 0);
  52         keyboard->set_context_pio(pio);
  53
  54         // cpu bus
  55         cpu->set_context_mem(memory);
  56         cpu->set_context_io(io);
  57         cpu->set_context_intr(dummy);
  58
  59         // memory bus
  60         memset(ram, 0, sizeof(ram));
  61         memset(rom, 0xff, sizeof(rom));
  62
  63         memory->read_bios(_T("MON.ROM"), rom, sizeof(rom));
  64
  65         memory->set_memory_r(0x0000, 0x1fff, rom);
  66         memory->set_memory_r(0x2000, 0x3fff, rom);
  67         memory->set_memory_r(0x4000, 0x5fff, rom);
  68         memory->set_memory_r(0x6000, 0x7fff, rom);
  69         memory->set_memory_rw(0x8000, 0x9fff, ram);
  70         memory->set_memory_rw(0xa000, 0xbfff, ram);
  71         memory->set_memory_rw(0xc000, 0xdfff, ram);
  72         memory->set_memory_rw(0xe000, 0xffff, ram);
  73
  74         // i/o bus
  75         io->set_iomap_range_w(0xf8, 0xfb, pio);
  76         io->set_iomap_range_r(0xf8, 0xfb, pio);
  77
  78         // initialize all devices
  79         for(DEVICE* device = first_device; device; device = device->next_device) {
  80                 device->initialize();
  81         }
  82 }
  83
  84 VM::~VM()
  85 {
  86         // delete all devices
  87         for(DEVICE* device = first_device; device;) {
  88                 DEVICE *next_device = device->next_device;
  89                 device->release();
  90                 delete device;
  91                 device = next_device;
  92         }
  93 }
  94
  95 DEVICE* VM::get_device(int id)
  96 {
  97         for(DEVICE* device = first_device; device; device = device->next_device) {
  98                 if(device->this_device_id == id) {
  99                         return device;
 100                 }
 101         }
 102         return NULL;
 103 }
 104
 105 // ----------------------------------------------------------------------------
 106 // drive virtual machine
 107 // ----------------------------------------------------------------------------
 108
 109 void VM::reset()
 110 {
 111         // reset all devices
 112         for(DEVICE* device = first_device; device; device = device->next_device) {
 113                 device->reset();
 114         }
 115 }
 116
 117 void VM::run()
 118 {
 119         event->drive();
 120 }
 121
 122 // ----------------------------------------------------------------------------
 123 // draw screen
 124 // ----------------------------------------------------------------------------
 125
 126 void VM::draw_screen()
 127 {
 128         display->draw_screen();
 129 }
 130
 131 // ----------------------------------------------------------------------------
 132 // soud manager
 133 // ----------------------------------------------------------------------------
 134
 135 void VM::initialize_sound(int rate, int samples)
 136 {
 137         // init sound manager
 138         event->initialize_sound(rate, samples);
 139
 140         // init sound gen
 141 //      pcm->initialize_sound(rate, 8000);
 142 }
 143
 144 uint16* VM::create_sound(int* extra_frames)
 145 {
 146         return event->create_sound(extra_frames);
 147 }
 148
 149 int VM::get_sound_buffer_ptr()
 150 {
 151         return event->get_sound_buffer_ptr();
 152 }
 153
 154 // ----------------------------------------------------------------------------
 155 // user interface
 156 // ----------------------------------------------------------------------------
 157
 158 void VM::load_binary(int drv, const _TCHAR* file_path)
 159 {
 160         if(drv == 0) {
 161                 memory->read_image(file_path, ram, sizeof(ram));
 162         }
 163 }
 164
 165 void VM::save_binary(int drv, const _TCHAR* file_path)
 166 {
 167         if(drv == 0) {
 168                 memory->write_image(file_path, ram, sizeof(ram));
 169         }
 170 }
 171
 172 bool VM::is_frame_skippable()
 173 {
 174         return event->is_frame_skippable();
 175 }
 176
 177 void VM::update_config()
 178 {
 179         for(DEVICE* device = first_device; device; device = device->next_device) {
 180                 device->update_config();
 181         }
 182 }
 183