source/src/vm/pc8201/pc8201.cpp

   1 /*
   2         NEC PC-8201 Emulator 'ePC-8201'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2009.03.31-
   6
   7         [ virtual machine ]
   8 */
   9
  10 #include "pc8201.h"
  11 #include "../../emu.h"
  12 #include "../device.h"
  13 #include "../event.h"
  14
  15 #include "../datarec.h"
  16 #include "../i8080.h"
  17 #include "../i8155.h"
  18 #include "../io.h"
  19 #include "../pcm1bit.h"
  20 #include "../upd1990a.h"
  21
  22 #ifdef USE_DEBUGGER
  23 #include "../debugger.h"
  24 #endif
  25
  26 #include "cmt.h"
  27 #include "keyboard.h"
  28 #include "lcd.h"
  29 #include "memory.h"
  30
  31 // ----------------------------------------------------------------------------
  32 // initialize
  33 // ----------------------------------------------------------------------------
  34
  35 VM::VM(EMU* parent_emu) : emu(parent_emu)
  36 {
  37         // create devices
  38         first_device = last_device = NULL;
  39         dummy = new DEVICE(this, emu);  // must be 1st device
  40         event = new EVENT(this, emu);   // must be 2nd device
  41
  42         drec = new DATAREC(this, emu);
  43         cpu = new I8080(this, emu);
  44         pio = new I8155(this, emu);
  45         io = new IO(this, emu);
  46         pcm = new PCM1BIT(this, emu);
  47         rtc = new UPD1990A(this, emu);
  48
  49         cmt = new CMT(this, emu);
  50         keyboard = new KEYBOARD(this, emu);
  51         lcd = new LCD(this, emu);
  52         memory = new MEMORY(this, emu);
  53
  54         // set contexts
  55         event->set_context_cpu(cpu);
  56         event->set_context_sound(pcm);
  57
  58         drec->set_context_out(cpu, SIG_I8085_SID, 1);
  59         cpu->set_context_sod(cmt, SIG_CMT_SOD, 1);
  60         pio->set_context_port_a(rtc, SIG_UPD1990A_C0, 1, 0);
  61         pio->set_context_port_a(rtc, SIG_UPD1990A_C1, 2, 0);
  62         pio->set_context_port_a(rtc, SIG_UPD1990A_C2, 4, 0);
  63         pio->set_context_port_a(rtc, SIG_UPD1990A_CLK, 8, 0);
  64         pio->set_context_port_a(rtc, SIG_UPD1990A_DIN, 0x10, 0);
  65         pio->set_context_port_a(keyboard, SIG_KEYBOARD_COLUMN_L, 0xff, 0);
  66         pio->set_context_port_a(lcd, SIG_LCD_CHIPSEL_L, 0xff, 0);
  67         pio->set_context_port_b(keyboard, SIG_KEYBOARD_COLUMN_H, 1, 0);
  68         pio->set_context_port_b(lcd, SIG_LCD_CHIPSEL_H, 3, 0);
  69         pio->set_context_port_b(pcm, SIG_PCM1BIT_MUTE, 0x20, 0);
  70         pio->set_context_timer(pcm, SIG_PCM1BIT_SIGNAL, 1);
  71         pio->set_constant_clock(CPU_CLOCKS);
  72         rtc->set_context_dout(pio, SIG_I8155_PORT_C, 1);
  73         rtc->set_context_tp(cpu, SIG_I8085_RST7, 1);
  74
  75         memory->set_context_cmt(cmt);
  76         memory->set_context_drec(drec);
  77         memory->set_context_rtc(rtc);
  78
  79         // cpu bus
  80         cpu->set_context_mem(memory);
  81         cpu->set_context_io(io);
  82         cpu->set_context_intr(io);
  83 #ifdef USE_DEBUGGER
  84         cpu->set_context_debugger(new DEBUGGER(this, emu));
  85 #endif
  86
  87         // i/o bus
  88         io->set_iomap_range_w(0x90, 0x9f, memory);
  89         io->set_iomap_range_rw(0xa0, 0xaf, memory);
  90         io->set_iomap_range_rw(0xb0, 0xbf, pio);
  91         io->set_iomap_range_r(0xe0, 0xef, keyboard);
  92         io->set_iomap_range_rw(0xf0, 0xff, lcd);
  93
  94         // initialize all devices
  95         for(DEVICE* device = first_device; device; device = device->next_device) {
  96                 device->initialize();
  97         }
  98         rtc->write_signal(SIG_UPD1990A_STB, 0, 0);
  99 }
 100
 101 VM::~VM()
 102 {
 103         // delete all devices
 104         for(DEVICE* device = first_device; device;) {
 105                 DEVICE *next_device = device->next_device;
 106                 device->release();
 107                 delete device;
 108                 device = next_device;
 109         }
 110 }
 111
 112 DEVICE* VM::get_device(int id)
 113 {
 114         for(DEVICE* device = first_device; device; device = device->next_device) {
 115                 if(device->this_device_id == id) {
 116                         return device;
 117                 }
 118         }
 119         return NULL;
 120 }
 121
 122 // ----------------------------------------------------------------------------
 123 // drive virtual machine
 124 // ----------------------------------------------------------------------------
 125
 126 void VM::reset()
 127 {
 128         // reset all devices
 129         for(DEVICE* device = first_device; device; device = device->next_device) {
 130                 device->reset();
 131         }
 132 }
 133
 134 void VM::run()
 135 {
 136         event->drive();
 137 }
 138
 139 // ----------------------------------------------------------------------------
 140 // debugger
 141 // ----------------------------------------------------------------------------
 142
 143 #ifdef USE_DEBUGGER
 144 DEVICE *VM::get_cpu(int index)
 145 {
 146         if(index == 0) {
 147                 return cpu;
 148         }
 149         return NULL;
 150 }
 151 #endif
 152
 153 // ----------------------------------------------------------------------------
 154 // draw screen
 155 // ----------------------------------------------------------------------------
 156
 157 void VM::draw_screen()
 158 {
 159         lcd->draw_screen();
 160 }
 161
 162 // ----------------------------------------------------------------------------
 163 // soud manager
 164 // ----------------------------------------------------------------------------
 165
 166 void VM::initialize_sound(int rate, int samples)
 167 {
 168         // init sound manager
 169         event->initialize_sound(rate, samples);
 170
 171         // init sound gen
 172         pcm->init(rate, 8000);
 173 }
 174
 175 uint16* VM::create_sound(int* extra_frames)
 176 {
 177         return event->create_sound(extra_frames);
 178 }
 179
 180 int VM::sound_buffer_ptr()
 181 {
 182         return event->sound_buffer_ptr();
 183 }
 184
 185 // ----------------------------------------------------------------------------
 186 // notify key
 187 // ----------------------------------------------------------------------------
 188
 189 void VM::key_down(int code, bool repeat)
 190 {
 191         keyboard->key_down(code);
 192 }
 193
 194 void VM::key_up(int code)
 195 {
 196 }
 197
 198 // ----------------------------------------------------------------------------
 199 // user interface
 200 // ----------------------------------------------------------------------------
 201
 202 void VM::play_tape(_TCHAR* file_path)
 203 {
 204         cmt->close_tape();
 205         drec->play_tape(file_path);
 206 }
 207
 208 void VM::rec_tape(_TCHAR* file_path)
 209 {
 210         drec->close_tape();
 211         cmt->rec_tape(file_path);
 212 }
 213
 214 void VM::close_tape()
 215 {
 216         drec->close_tape();
 217         cmt->close_tape();
 218 }
 219
 220 bool VM::tape_inserted()
 221 {
 222         return drec->tape_inserted() || cmt->tape_inserted();
 223 }
 224
 225 bool VM::now_skip()
 226 {
 227         return event->now_skip();
 228 }
 229
 230 void VM::update_config()
 231 {
 232         for(DEVICE* device = first_device; device; device = device->next_device) {
 233                 device->update_config();
 234         }
 235 }
 236