source/src/vm/mz3500/mz3500.cpp

   1 /*
   2         SHARP MZ-3500 Emulator 'EmuZ-3500'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2010.08.31-
   6
   7         [ virtual machine ]
   8 */
   9
  10 #include "mz3500.h"
  11 #include "../../emu.h"
  12 #include "../device.h"
  13 #include "../event.h"
  14
  15 #include "../disk.h"
  16 #include "../i8251.h"
  17 #include "../i8253.h"
  18 #include "../i8255.h"
  19 #include "../io.h"
  20 #include "../pcm1bit.h"
  21 #include "../upd1990a.h"
  22 #include "../upd7220.h"
  23 #include "../upd765a.h"
  24 #include "../z80.h"
  25
  26 #ifdef USE_DEBUGGER
  27 #include "../debugger.h"
  28 #endif
  29
  30 #include "main.h"
  31 #include "sub.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         // for main cpu
  45         io = new IO(this, emu);
  46         fdc = new UPD765A(this, emu);
  47         cpu = new Z80(this, emu);
  48         main = new MAIN(this, emu);
  49
  50         // for sub cpu
  51         sio = new I8251(this, emu);
  52         pit = new I8253(this, emu);
  53         pio = new I8255(this, emu);
  54         subio = new IO(this, emu);
  55         pcm = new PCM1BIT(this, emu);
  56         rtc = new UPD1990A(this, emu);
  57         gdc_chr = new UPD7220(this, emu);
  58         gdc_gfx = new UPD7220(this, emu);
  59         subcpu = new Z80(this, emu);
  60         sub = new SUB(this, emu);
  61
  62         // set contexts
  63         event->set_context_cpu(cpu);
  64         event->set_context_cpu(subcpu);
  65         event->set_context_sound(pcm);
  66
  67         // mz3500sm p.59
  68         fdc->set_context_irq(main, SIG_MAIN_INTFD, 1);
  69         fdc->set_context_drq(main, SIG_MAIN_DRQ, 1);
  70         fdc->set_context_index(main, SIG_MAIN_INDEX, 1);
  71
  72         // mz3500sm p.72,77
  73         sio->set_context_rxrdy(subcpu, SIG_CPU_NMI, 1);
  74
  75         // mz3500sm p.77
  76         // i8253 ch.0 -> i8251 txc,rxc
  77         pit->set_context_ch1(pcm, SIG_PCM1BIT_SIGNAL, 1);
  78         pit->set_context_ch2(pit, SIG_I8253_GATE_1, 1);
  79         pit->set_constant_clock(0, 2450000);
  80         pit->set_constant_clock(1, 2450000);
  81         pit->set_constant_clock(2, 2450000);
  82
  83         // mz3500sm p.78,80,81
  84         // i8255 pa0-pa7 -> printer data
  85         pio->set_context_port_b(rtc, SIG_UPD1990A_STB, 0x01, 0);
  86         pio->set_context_port_b(rtc, SIG_UPD1990A_C0,  0x02, 0);
  87         pio->set_context_port_b(rtc, SIG_UPD1990A_C1,  0x04, 0);
  88         pio->set_context_port_b(rtc, SIG_UPD1990A_C2,  0x08, 0);
  89         pio->set_context_port_b(rtc, SIG_UPD1990A_DIN, 0x10, 0);
  90         pio->set_context_port_b(rtc, SIG_UPD1990A_CLK, 0x20, 0);
  91         pio->set_context_port_b(main, SIG_MAIN_SRDY, 0x40, 0);
  92         pio->set_context_port_b(sub, SIG_SUB_PIO_PM, 0x80, 0);  // P/M: CG Selection
  93         pio->set_context_port_c(sub, SIG_SUB_KEYBOARD_DC, 0x01, 0);
  94         pio->set_context_port_c(sub, SIG_SUB_KEYBOARD_STC, 0x02, 0);
  95         pio->set_context_port_c(sub, SIG_SUB_KEYBOARD_ACKC, 0x04, 0);
  96         // i8255 pc3 <- intr (not use ???)
  97         pio->set_context_port_c(pcm, SIG_PCM1BIT_MUTE, 0x10, 0);
  98         // i8255 pc5 -> printer strobe
  99         // i8255 pc6 <- printer ack
 100         pio->set_context_port_c(sub, SIG_SUB_PIO_OBF, 0x80, 0);
 101
 102         // mz3500sm p.80,81
 103         rtc->set_context_dout(sub, SIG_SUB_RTC_DOUT, 1);
 104
 105         gdc_chr->set_vram_ptr(sub->get_vram_chr(), 0x1000);
 106         sub->set_sync_ptr_chr(gdc_chr->get_sync());
 107         sub->set_ra_ptr_chr(gdc_chr->get_ra());
 108         sub->set_cs_ptr_chr(gdc_chr->get_cs());
 109         sub->set_ead_ptr_chr(gdc_chr->get_ead());
 110
 111         gdc_gfx->set_vram_ptr(sub->get_vram_gfx(), 0x20000);
 112         sub->set_sync_ptr_gfx(gdc_gfx->get_sync());
 113         sub->set_ra_ptr_gfx(gdc_gfx->get_ra());
 114         sub->set_cs_ptr_gfx(gdc_gfx->get_cs());
 115         sub->set_ead_ptr_gfx(gdc_gfx->get_ead());
 116
 117         // mz3500sm p.23
 118         subcpu->set_context_busack(main, SIG_MAIN_SACK, 1);
 119
 120         main->set_context_cpu(cpu);
 121         main->set_context_subcpu(subcpu);
 122         main->set_context_fdc(fdc);
 123
 124         sub->set_context_main(main);
 125         sub->set_ipl(main->get_ipl());
 126         sub->set_common(main->get_common());
 127
 128         // mz3500sm p.17
 129         io->set_iomap_range_rw(0xec, 0xef, main);       // reset int0
 130         io->set_iomap_range_rw(0xf4, 0xf7, fdc);        // fdc: f4h,f6h = status, f5h,f7h = data
 131         io->set_iomap_range_rw(0xf8, 0xfb, main);       // mfd interface
 132         io->set_iomap_range_rw(0xfc, 0xff, main);       // memory mpaper
 133
 134         // mz3500sm p.18
 135         subio->set_iomap_range_rw(0x00, 0x0f, sub);     // int0 to main (set flipflop)
 136         subio->set_iomap_range_rw(0x10, 0x1f, sio);
 137         subio->set_iomap_range_rw(0x20, 0x2f, pit);
 138         subio->set_iomap_range_rw(0x30, 0x3f, pio);
 139         subio->set_iomap_range_r(0x40, 0x4f, sub);      // input port
 140         subio->set_iomap_range_w(0x50, 0x5f, sub);      // crt control i/o
 141         subio->set_iomap_range_rw(0x60, 0x6f, gdc_gfx);
 142         subio->set_iomap_range_rw(0x70, 0x7f, gdc_chr);
 143
 144         // cpu bus
 145         cpu->set_context_mem(main);
 146         cpu->set_context_io(io);
 147         cpu->set_context_intr(main);
 148 #ifdef USE_DEBUGGER
 149         cpu->set_context_debugger(new DEBUGGER(this, emu));
 150 #endif
 151
 152         subcpu->set_context_mem(sub);
 153         subcpu->set_context_io(subio);
 154         subcpu->set_context_intr(sub);
 155 #ifdef USE_DEBUGGER
 156         subcpu->set_context_debugger(new DEBUGGER(this, emu));
 157 #endif
 158
 159         // initialize all devices
 160         for(DEVICE* device = first_device; device; device = device->next_device) {
 161                 device->initialize();
 162         }
 163         for(int i = 0; i < 4; i++) {
 164                 fdc->set_drive_type(i, DRIVE_TYPE_2DD);
 165         }
 166 }
 167
 168 VM::~VM()
 169 {
 170         // delete all devices
 171         for(DEVICE* device = first_device; device;) {
 172                 DEVICE *next_device = device->next_device;
 173                 device->release();
 174                 delete device;
 175                 device = next_device;
 176         }
 177 }
 178
 179 DEVICE* VM::get_device(int id)
 180 {
 181         for(DEVICE* device = first_device; device; device = device->next_device) {
 182                 if(device->this_device_id == id) {
 183                         return device;
 184                 }
 185         }
 186         return NULL;
 187 }
 188
 189 // ----------------------------------------------------------------------------
 190 // drive virtual machine
 191 // ----------------------------------------------------------------------------
 192
 193 void VM::reset()
 194 {
 195         // reset all devices
 196         for(DEVICE* device = first_device; device; device = device->next_device) {
 197                 device->reset();
 198         }
 199
 200         // set busreq of sub cpu
 201         subcpu->write_signal(SIG_CPU_BUSREQ, 1, 1);
 202 }
 203
 204 void VM::run()
 205 {
 206         event->drive();
 207 }
 208
 209 double VM::frame_rate()
 210 {
 211         return event->frame_rate();
 212 }
 213
 214 // ----------------------------------------------------------------------------
 215 // debugger
 216 // ----------------------------------------------------------------------------
 217
 218 #ifdef USE_DEBUGGER
 219 DEVICE *VM::get_cpu(int index)
 220 {
 221         if(index == 0) {
 222                 return cpu;
 223         } else if(index == 1) {
 224                 return subcpu;
 225         }
 226         return NULL;
 227 }
 228 #endif
 229
 230 // ----------------------------------------------------------------------------
 231 // draw screen
 232 // ----------------------------------------------------------------------------
 233
 234 void VM::draw_screen()
 235 {
 236         sub->draw_screen();
 237 }
 238
 239 int VM::access_lamp()
 240 {
 241         uint32 status = fdc->read_signal(0);
 242         return (status & (1 | 4)) ? 1 : (status & (2 | 8)) ? 2 : 0;
 243 }
 244
 245 // ----------------------------------------------------------------------------
 246 // soud manager
 247 // ----------------------------------------------------------------------------
 248
 249 void VM::initialize_sound(int rate, int samples)
 250 {
 251         // init sound manager
 252         event->initialize_sound(rate, samples);
 253
 254         // init sound gen
 255         pcm->init(rate, 8000);
 256 }
 257
 258 uint16* VM::create_sound(int* extra_frames)
 259 {
 260         return event->create_sound(extra_frames);
 261 }
 262
 263 int VM::sound_buffer_ptr()
 264 {
 265         return event->sound_buffer_ptr();
 266 }
 267
 268 // ----------------------------------------------------------------------------
 269 // notify key
 270 // ----------------------------------------------------------------------------
 271
 272 void VM::key_down(int code, bool repeat)
 273 {
 274         sub->key_down(code);
 275 }
 276
 277 void VM::key_up(int code)
 278 {
 279         sub->key_up(code);
 280 }
 281
 282 // ----------------------------------------------------------------------------
 283 // user interface
 284 // ----------------------------------------------------------------------------
 285
 286 void VM::open_disk(int drv, _TCHAR* file_path, int offset)
 287 {
 288         fdc->open_disk(drv, file_path, offset);
 289 }
 290
 291 void VM::close_disk(int drv)
 292 {
 293         fdc->close_disk(drv);
 294 }
 295
 296 bool VM::disk_inserted(int drv)
 297 {
 298         return fdc->disk_inserted(drv);
 299 }
 300
 301 bool VM::now_skip()
 302 {
 303         return event->now_skip();
 304 }
 305
 306 void VM::update_config()
 307 {
 308         for(DEVICE* device = first_device; device; device = device->next_device) {
 309                 device->update_config();
 310         }
 311 }
 312