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