source/src/vm/mycomz80a/mycomz80a.cpp

   1 /*
   2         Japan Electronics College MYCOMZ-80A Emulator 'eMYCOMZ-80A'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2009.05.13-
   6
   7         [ virtual machine ]
   8 */
   9
  10 #include "mycomz80a.h"
  11 #include "../../emu.h"
  12 #include "../device.h"
  13 #include "../event.h"
  14
  15 #include "../datarec.h"
  16 #include "../hd46505.h"
  17 #include "../i8255.h"
  18 #include "../io.h"
  19 #include "../msm58321.h"
  20 #include "../sn76489an.h"
  21 #include "../z80.h"
  22
  23 #ifdef USE_DEBUGGER
  24 #include "../debugger.h"
  25 #endif
  26
  27 #include "display.h"
  28 #include "keyboard.h"
  29 #include "memory.h"
  30
  31 #include "../../fileio.h"
  32
  33 // ----------------------------------------------------------------------------
  34 // initialize
  35 // ----------------------------------------------------------------------------
  36
  37 VM::VM(EMU* parent_emu) : emu(parent_emu)
  38 {
  39         // create devices
  40         first_device = last_device = NULL;
  41         dummy = new DEVICE(this, emu);  // must be 1st device
  42         event = new EVENT(this, emu);   // must be 2nd device
  43
  44         drec = new DATAREC(this, emu);
  45         crtc = new HD46505(this, emu);
  46         pio1 = new I8255(this, emu);
  47         pio2 = new I8255(this, emu);
  48         pio3 = new I8255(this, emu);
  49         io = new IO(this, emu);
  50         rtc = new MSM58321(this, emu);  // MSM5832
  51         psg = new SN76489AN(this, emu);
  52         cpu = new Z80(this, emu);
  53
  54         display = new DISPLAY(this, emu);
  55         keyboard = new KEYBOARD(this, emu);
  56         memory = new MEMORY(this, emu);
  57
  58         // set contexts
  59         event->set_context_cpu(cpu);
  60         event->set_context_sound(psg);
  61
  62         //      00      out     system control
  63         //      01      in/out  vram data
  64         //      02      out     crtc addr
  65         //      03      in/out  crtc data
  66         //      04-07   in/ou   pio1
  67         //              pa0-7   out     vram addr low, psg data
  68         //              pb0-7   in      keyboard data
  69         //              pc0-2   out     vram addr high
  70         //              pc3     out     fdc format write
  71         //              pc4     in      keyboard s2
  72         //              pc5     in      keyboard s3
  73         //              pc6     in      keyboard s4 (motor on/off)
  74         //              pc7     in      keyboard s5 (slow)
  75         //      08-0b   in/ou   pio2
  76         //              pa0     in      keyboard strobe (1=pressed)
  77         //              pa1     in      keyboard shift (1=pressed)
  78         //              pa2     in      cmt in
  79         //              pa3-6   in      printer ctrl
  80         //              pa7     in      crtc disptmg
  81         //              pb0-7   out     printer data
  82         //              pc0     out     printer strobe
  83         //              pc1     out     printer reset
  84         //              pc2     out     cmt out
  85         //              pc3     out     cmt remote
  86         //              pc4     out     psg we
  87         //              pc5     out     psg cs
  88         //              pc6     out     display chr/cg (0=chr,1=cg)
  89         //              pc7     out     display freq (0=80column,1=40column)
  90         //      0c-0f   in/ou   pio3
  91         //              pa0-6   in      fdc control
  92         //              pb0-3   in/out  rtc data
  93         //              pc0-3   out     rtc address
  94         //              pc4     out     rtc hold
  95         //              pc5     out     rtc rd
  96         //              pc6     out     rtc wr
  97         //              pc7     out     rtc cs
  98         drec->set_context_out(pio2, SIG_I8255_PORT_A, 4);
  99         crtc->set_context_disp(pio2, SIG_I8255_PORT_A, 0x80);
 100         pio1->set_context_port_a(display, SIG_DISPLAY_ADDR_L, 0xff, 0);
 101         pio1->set_context_port_a(psg, SIG_SN76489AN_DATA, 0xff, 0);
 102         pio1->set_context_port_c(display, SIG_DISPLAY_ADDR_H, 7, 0);
 103         pio2->set_context_port_c(drec, SIG_DATAREC_OUT, 4, 0);
 104         pio2->set_context_port_c(drec, SIG_DATAREC_REMOTE, 8, 0);
 105         pio2->set_context_port_c(psg, SIG_SN76489AN_WE, 0x10, 0);
 106         pio2->set_context_port_c(psg, SIG_SN76489AN_CS, 0x20, 0);
 107         pio2->set_context_port_c(display, SIG_DISPLAY_MODE, 0xc0, 0);
 108         pio3->set_context_port_b(rtc, SIG_MSM58321_DATA, 0x0f, 0);
 109         pio3->set_context_port_c(rtc, SIG_MSM5832_ADDR, 0x0f, 0);
 110         pio3->set_context_port_c(rtc, SIG_MSM5832_HOLD, 0x10, 0);
 111         pio3->set_context_port_c(rtc, SIG_MSM58321_READ, 0x20, 0);
 112         pio3->set_context_port_c(rtc, SIG_MSM58321_WRITE, 0x40, 0);
 113         pio3->set_context_port_c(rtc, SIG_MSM58321_CS, 0x80, 0);
 114         rtc->set_context_data(pio3, SIG_I8255_PORT_B, 0x0f, 0);
 115
 116         display->set_regs_ptr(crtc->get_regs());
 117         keyboard->set_context_cpu(cpu);
 118         keyboard->set_context_pio1(pio1);
 119         keyboard->set_context_pio2(pio2);
 120
 121         // cpu bus
 122         cpu->set_context_mem(memory);
 123         cpu->set_context_io(io);
 124         cpu->set_context_intr(dummy);
 125 #ifdef USE_DEBUGGER
 126         cpu->set_context_debugger(new DEBUGGER(this, emu));
 127 #endif
 128
 129         // i/o bus
 130         io->set_iomap_single_w(0x00, memory);
 131         io->set_iomap_single_rw(0x01, display);
 132         io->set_iomap_range_rw(0x02, 0x03, crtc);
 133         io->set_iomap_range_rw(0x04, 0x07, pio1);
 134         io->set_iomap_range_rw(0x08, 0x0b, pio2);
 135         io->set_iomap_range_rw(0x0c, 0x0f, pio3);
 136
 137         // initialize all devices
 138         for(DEVICE* device = first_device; device; device = device->next_device) {
 139                 device->initialize();
 140         }
 141 }
 142
 143 VM::~VM()
 144 {
 145         // delete all devices
 146         for(DEVICE* device = first_device; device;) {
 147                 DEVICE *next_device = device->next_device;
 148                 device->release();
 149                 delete device;
 150                 device = next_device;
 151         }
 152 }
 153
 154 DEVICE* VM::get_device(int id)
 155 {
 156         for(DEVICE* device = first_device; device; device = device->next_device) {
 157                 if(device->this_device_id == id) {
 158                         return device;
 159                 }
 160         }
 161         return NULL;
 162 }
 163
 164 // ----------------------------------------------------------------------------
 165 // drive virtual machine
 166 // ----------------------------------------------------------------------------
 167
 168 void VM::reset()
 169 {
 170         // reset all devices
 171         for(DEVICE* device = first_device; device; device = device->next_device) {
 172                 device->reset();
 173         }
 174 }
 175
 176 void VM::run()
 177 {
 178         event->drive();
 179 }
 180
 181 double VM::frame_rate()
 182 {
 183         return event->frame_rate();
 184 }
 185
 186 // ----------------------------------------------------------------------------
 187 // debugger
 188 // ----------------------------------------------------------------------------
 189
 190 #ifdef USE_DEBUGGER
 191 DEVICE *VM::get_cpu(int index)
 192 {
 193         if(index == 0) {
 194                 return cpu;
 195         }
 196         return NULL;
 197 }
 198 #endif
 199
 200 // ----------------------------------------------------------------------------
 201 // draw screen
 202 // ----------------------------------------------------------------------------
 203
 204 void VM::draw_screen()
 205 {
 206         display->draw_screen();
 207 }
 208
 209 // ----------------------------------------------------------------------------
 210 // soud manager
 211 // ----------------------------------------------------------------------------
 212
 213 void VM::initialize_sound(int rate, int samples)
 214 {
 215         // init sound manager
 216         event->initialize_sound(rate, samples);
 217
 218         // init sound gen
 219         psg->init(rate, 2500800, 10000);
 220 }
 221
 222 uint16* VM::create_sound(int* extra_frames)
 223 {
 224         return event->create_sound(extra_frames);
 225 }
 226
 227 int VM::sound_buffer_ptr()
 228 {
 229         return event->sound_buffer_ptr();
 230 }
 231
 232 // ----------------------------------------------------------------------------
 233 // notify key
 234 // ----------------------------------------------------------------------------
 235
 236 void VM::key_down(int code, bool repeat)
 237 {
 238         keyboard->key_down(code);
 239 }
 240
 241 void VM::key_up(int code)
 242 {
 243         keyboard->key_up(code);
 244 }
 245
 246 // ----------------------------------------------------------------------------
 247 // user interface
 248 // ----------------------------------------------------------------------------
 249
 250 void VM::play_tape(_TCHAR* file_path)
 251 {
 252         drec->play_tape(file_path);
 253 //      drec->write_signal(SIG_DATAREC_REMOTE, 1, 1);
 254 }
 255
 256 void VM::rec_tape(_TCHAR* file_path)
 257 {
 258         drec->rec_tape(file_path);
 259 //      drec->write_signal(SIG_DATAREC_REMOTE, 1, 1);
 260 }
 261
 262 void VM::close_tape()
 263 {
 264         drec->close_tape();
 265 //      drec->write_signal(SIG_DATAREC_REMOTE, 0, 1);
 266 }
 267
 268 bool VM::tape_inserted()
 269 {
 270         return drec->tape_inserted();
 271 }
 272
 273 bool VM::now_skip()
 274 {
 275         return event->now_skip();
 276 }
 277
 278 void VM::update_config()
 279 {
 280         for(DEVICE* device = first_device; device; device = device->next_device) {
 281                 device->update_config();
 282         }
 283 }
 284
 285 #define STATE_VERSION   1
 286
 287 void VM::save_state(FILEIO* state_fio)
 288 {
 289         state_fio->FputUint32(STATE_VERSION);
 290
 291         for(DEVICE* device = first_device; device; device = device->next_device) {
 292                 device->save_state(state_fio);
 293         }
 294 }
 295
 296 bool VM::load_state(FILEIO* state_fio)
 297 {
 298         if(state_fio->FgetUint32() != STATE_VERSION) {
 299                 return false;
 300         }
 301         for(DEVICE* device = first_device; device; device = device->next_device) {
 302                 if(!device->load_state(state_fio)) {
 303                         return false;
 304                 }
 305         }
 306         return true;
 307 }
 308