/*
	NEC PC-8801MA Emulator 'ePC-8801MA'
	NEC PC-8001mkIISR Emulator 'ePC-8001mkIISR'

	Author : Takeda.Toshiya
	Date   : 2012.02.16-

	[ virtual machine ]
*/

#include "pc8801.h"
#include "../../emu.h"
#include "../device.h"
#include "../event.h"

#include "../i8251.h"
#include "../i8255.h"
#include "../pcm1bit.h"
//#include "../pcpr201.h"
#include "../prnfile.h"
#include "../upd1990a.h"
#include "../ym2203.h"
#include "../z80.h"

#include "../disk.h"
#include "../noise.h"
#include "../pc80s31k.h"
#include "../upd765a.h"

#ifdef USE_DEBUGGER
#include "../debugger.h"
#endif

#ifdef SUPPORT_PC88_PCG8100
#include "../i8253.h"
#endif

#include "pc88.h"

// ----------------------------------------------------------------------------
// initialize
// ----------------------------------------------------------------------------

VM::VM(EMU* parent_emu) : emu(parent_emu)
{
	// check configs
	boot_mode = config.boot_mode;
	
	// create devices
	first_device = last_device = NULL;
	dummy = new DEVICE(this, emu);	// must be 1st device
	
	pc88event = new EVENT(this, emu);
	pc88event->set_device_name(_T("Event Manager (PC-8801)"));
//	pc88event->set_frames_per_sec(60);
//	pc88event->set_lines_per_frame(260);
	dummy->set_device_name(_T("1st Dummy"));
	pc88 = new PC88(this, emu);

  #if defined(_PC8001) || defined(_PC8001MK2) || defined(_PC8001SR)
	pc88->set_device_name(_T("PC8001 MAIN"));
  #else
	pc88->set_device_name(_T("PC8801 MAIN"));
  #endif
//	pc88->set_context_event_manager(pc88event);
	pc88sio = new I8251(this, emu);
//	pc88sio->set_device_name(_T("8251 SIO (PC-8801)"));
//	pc88sio->set_context_event_manager(pc88event);
	pc88pio = new I8255(this, emu);
//	pc88pio->set_device_name(_T("8255 PIO (PC-8801)"));
//	pc88pio->set_context_event_manager(pc88event);
	pc88pcm = new PCM1BIT(this, emu);
//	pc88pcm->set_device_name(_T("1-Bit PCM Sound (PC-8801)"));
//	pc88pcm->set_context_event_manager(pc88event);
	pc88rtc = new UPD1990A(this, emu);
//	pc88rtc->set_device_name(_T("uPD1990A RTC (PC-8801)"));
//	pc88rtc->set_context_event_manager(pc88event);
	// config.sound_device_type
	// 	0: 44h:OPNA A4h:None		PC-8801FH/MH or later
	// 	1: 44h:OPN  A4h:None		PC-8801mkIISR/TR/MR/FR
	// 	2: 44h:OPN  A4h:OPNA		PC-8801mkIISR/TR/MR/FR + PC-8801-23
	pc88opn = new YM2203(this, emu);
//	pc88opn->set_context_event_manager(pc88event);
#ifdef USE_SOUND_TYPE
#ifdef SUPPORT_PC88_OPNA
	pc88opn->is_ym2608 = (config.sound_type == 0);
#endif
#ifdef SUPPORT_PC88_SB2
	if(config.sound_type == 2) {
		pc88sb2 = new YM2203(this, emu);
#ifdef SUPPORT_PC88_OPNA
		pc88sb2->is_ym2608 = true;
#endif
    #ifdef SUPPORT_PC88_OPNA
		pc88sb2->set_device_name(_T("YM2608 OPNA(SB2)"));
    #else
		pc88sb2->set_device_name(_T("YM2203 OPN(SB2)"));
    #endif
//		pc88sb2->set_context_event_manager(pc88event);
	} else {
		pc88sb2 = NULL;
	}
#endif
#endif
	if(config.printer_type == 0) {
		pc88prn = new PRNFILE(this, emu);
//		pc88prn->set_context_event_manager(pc88event);
//	} else if(config.printer_type == 1) {
//		pc88prn = new PCPR201(this, emu);
//		pc88prn->set_context_event_manager(pc88event);
	} else {
		pc88prn = dummy;
	}

	dummycpu = new DEVICE(this, emu);
	pc88cpu = new Z80(this, emu);
//	pc88cpu->set_context_event_manager(pc88event);
	dummycpu->set_device_name(_T("DUMMY CPU"));
	pc88cpu->set_device_name(_T("MAIN CPU(Z80)"));
	
	pc88sub = new PC80S31K(this, emu);
//	pc88sub->set_context_event_manager(pc88event);
	pc88pio_sub = new I8255(this, emu);
//	pc88pio_sub->set_context_event_manager(pc88event);
	pc88fdc_sub = new UPD765A(this, emu);
//	pc88fdc_sub->set_context_event_manager(pc88event);
	pc88noise_seek = new NOISE(this, emu);
//	pc88noise_seek->set_context_event_manager(pc88event);
	pc88noise_head_down = new NOISE(this, emu);
//	pc88noise_head_down->set_context_event_manager(pc88event);
	pc88noise_head_up = new NOISE(this, emu);
//	pc88noise_head_up->set_context_event_manager(pc88event);
	pc88cpu_sub = new Z80(this, emu);
//	pc88cpu_sub->set_context_event_manager(pc88event);

	pc88sub->set_device_name(_T("PC-80S31K FDD I/F"));
	pc88pio_sub->set_device_name(_T("i8255 PIO(FDD)"));
	pc88fdc_sub->set_device_name(_T("uPD765A FDC(FDD)"));
	pc88cpu_sub->set_device_name(_T("Z80 CPU(FDD)"));
#ifdef SUPPORT_PC88_PCG8100
	pc88pit = new I8253(this, emu);
//	pc88pit->set_context_event_manager(pc88event);
	pc88pcm0 = new PCM1BIT(this, emu);
//	pc88pcm->set_context_event_manager(pc88event);
	pc88pcm1 = new PCM1BIT(this, emu);
//	pc88pcm->set_context_event_manager(pc88event);
	pc88pcm2 = new PCM1BIT(this, emu);
//	pc88pcm->set_context_event_manager(pc88event);
	pc88pit->set_device_name(_T("i8253 PIT (PCG8100)"));
	pc88pcm0->set_device_name(_T("SOUND #1 (PCG8100)"));
	pc88pcm1->set_device_name(_T("SOUND #2 (PCG8100)"));
	pc88pcm2->set_device_name(_T("SOUND #3 (PCG8100)"));
#endif
	pc88event->set_context_sound(pc88noise_seek);
	pc88event->set_context_sound(pc88noise_head_down);
	pc88event->set_context_sound(pc88noise_head_up);
	
	pc88event->set_context_cpu(dummycpu, 3993624 / 4);
#ifdef SUPPORT_PC88_HIGH_CLOCK
	pc88event->set_context_cpu(pc88cpu, (config.cpu_type != 0) ? 3993624 : 7987248);
#else
	pc88event->set_context_cpu(pc88cpu, 3993624);
#endif
	pc88event->set_context_cpu(pc88cpu_sub, 3993624);
	pc88event->set_context_sound(pc88opn);
#ifdef SUPPORT_PC88_SB2
	if(pc88sb2 != NULL) {
		pc88event->set_context_sound(pc88sb2);
	}
#endif
	pc88event->set_context_sound(pc88pcm);
#ifdef SUPPORT_PC88_PCG8100
	pc88event->set_context_sound(pc88pcm0);
	pc88event->set_context_sound(pc88pcm1);
	pc88event->set_context_sound(pc88pcm2);
#endif
	pc88->set_context_cpu(pc88cpu);
	pc88->set_context_opn(pc88opn);
#ifdef SUPPORT_PC88_SB2
	pc88->set_context_sb2(pc88sb2);
#endif
	pc88->set_context_pcm(pc88pcm);
	pc88->set_context_pio(pc88pio);
	pc88->set_context_prn(pc88prn);
	pc88->set_context_rtc(pc88rtc);
	pc88->set_context_sio(pc88sio);
#ifdef SUPPORT_PC88_PCG8100
	pc88->set_context_pcg_pit(pc88pit);
	pc88->set_context_pcg_pcm0(pc88pcm0);
	pc88->set_context_pcg_pcm1(pc88pcm1);
	pc88->set_context_pcg_pcm2(pc88pcm2);
#endif
	pc88cpu->set_context_mem(pc88);
	pc88cpu->set_context_io(pc88);
	pc88cpu->set_context_intr(pc88);
#ifdef USE_DEBUGGER
	pc88cpu->set_context_debugger(new DEBUGGER(this, emu));
#endif
	pc88opn->set_context_irq(pc88, SIG_PC88_SOUND_IRQ, 1);
#ifdef SUPPORT_PC88_SB2
	if(pc88sb2 != NULL) {
		pc88sb2->set_context_irq(pc88, SIG_PC88_SB2_IRQ, 1);
	}
#endif
	pc88sio->set_context_rxrdy(pc88, SIG_PC88_USART_IRQ, 1);
	pc88sio->set_context_out(pc88, SIG_PC88_USART_OUT);
	
	pc88sub->set_context_cpu(pc88cpu_sub);
	pc88sub->set_context_fdc(pc88fdc_sub);
	pc88sub->set_context_pio(pc88pio_sub);
	pc88pio->set_context_port_a(pc88pio_sub, SIG_I8255_PORT_B, 0xff, 0);
	pc88pio->set_context_port_b(pc88pio_sub, SIG_I8255_PORT_A, 0xff, 0);
	pc88pio->set_context_port_c(pc88pio_sub, SIG_I8255_PORT_C, 0x0f, 4);
	pc88pio->set_context_port_c(pc88pio_sub, SIG_I8255_PORT_C, 0xf0, -4);
	pc88pio->clear_ports_by_cmdreg = true;
	pc88pio_sub->set_context_port_a(pc88pio, SIG_I8255_PORT_B, 0xff, 0);
	pc88pio_sub->set_context_port_b(pc88pio, SIG_I8255_PORT_A, 0xff, 0);
	pc88pio_sub->set_context_port_c(pc88pio, SIG_I8255_PORT_C, 0x0f, 4);
	pc88pio_sub->set_context_port_c(pc88pio, SIG_I8255_PORT_C, 0xf0, -4);
	pc88pio_sub->clear_ports_by_cmdreg = true;
	pc88fdc_sub->set_context_irq(pc88cpu_sub, SIG_CPU_IRQ, 1);
	pc88fdc_sub->set_context_noise_seek(pc88noise_seek);
	pc88fdc_sub->set_context_noise_head_down(pc88noise_head_down);
	pc88fdc_sub->set_context_noise_head_up(pc88noise_head_up);
	pc88cpu_sub->set_context_mem(pc88sub);
	pc88cpu_sub->set_context_io(pc88sub);
	pc88cpu_sub->set_context_intr(pc88sub);
#ifdef USE_DEBUGGER
	pc88cpu_sub->set_context_debugger(new DEBUGGER(this, emu));
#endif
	
#ifdef SUPPORT_PC88_PCG8100
	pc88pit->set_context_ch0(pc88pcm0, SIG_PCM1BIT_SIGNAL, 1);
	pc88pit->set_context_ch1(pc88pcm1, SIG_PCM1BIT_SIGNAL, 1);
	pc88pit->set_context_ch2(pc88pcm2, SIG_PCM1BIT_SIGNAL, 1);
	pc88pit->set_constant_clock(0, 3993624);
	pc88pit->set_constant_clock(1, 3993624);
	pc88pit->set_constant_clock(2, 3993624);
#endif
	
	// initialize all devices
	for(DEVICE* device = first_device; device; device = device->next_device) {
		device->initialize();
	}
}

VM::~VM()
{
	// delete all devices
	for(DEVICE* device = first_device; device;) {
		DEVICE *next_device = device->next_device;
		device->release();
		delete device;
		device = next_device;
	}
}

DEVICE* VM::get_device(int id)
{
	for(DEVICE* device = first_device; device; device = device->next_device) {
		if(device->this_device_id == id) {
			return device;
		}
	}
	return NULL;
}

// ----------------------------------------------------------------------------
// drive virtual machine
// ----------------------------------------------------------------------------

void VM::reset()
{
	// reset all devices
	for(DEVICE* device = first_device; device; device = device->next_device) {
		device->reset();
	}
	for(DEVICE* device = first_device; device; device = device->next_device) {
		device->reset();
	}
	
	// initial device settings
	pc88opn->set_reg(0x29, 3); // for Misty Blue
	pc88pio->write_signal(SIG_I8255_PORT_C, 0, 0xff);
	pc88pio_sub->write_signal(SIG_I8255_PORT_C, 0, 0xff);
}

void VM::run()
{
	pc88event->drive();
}

double VM::get_frame_rate()
{
	return pc88event->get_frame_rate();
}

// ----------------------------------------------------------------------------
// debugger
// ----------------------------------------------------------------------------

#ifdef USE_DEBUGGER
DEVICE *VM::get_cpu(int index)
{
	if(index == 0) {
		return pc88cpu;
	} else if(index == 1) {
		return pc88cpu_sub;
	}
	return NULL;
}
#endif

// ----------------------------------------------------------------------------
// draw screen
// ----------------------------------------------------------------------------

void VM::draw_screen()
{
	pc88->draw_screen();
}

// ----------------------------------------------------------------------------
// soud manager
// ----------------------------------------------------------------------------

void VM::initialize_sound(int rate, int samples)
{
	// init sound manager
	pc88event->initialize_sound(rate, samples);
	
	// init sound gen
#ifdef SUPPORT_PC88_OPNA
	if(pc88opn->is_ym2608) {
		pc88opn->initialize_sound(rate, 7987248, samples, 0, 0);
	} else
#endif
	pc88opn->initialize_sound(rate, 3993624, samples, 0, 0);
#ifdef SUPPORT_PC88_SB2
	if(pc88sb2 != NULL) {
#ifdef SUPPORT_PC88_OPNA
		if(pc88sb2->is_ym2608) {
			pc88sb2->initialize_sound(rate, 7987248, samples, 0, 0);
		} else
#endif
		pc88sb2->initialize_sound(rate, 3993624, samples, 0, 0);
	}
#endif
	pc88pcm->initialize_sound(rate, 8000);
#ifdef SUPPORT_PC88_PCG8100
	pc88pcm0->initialize_sound(rate, 8000);
	pc88pcm1->initialize_sound(rate, 8000);
	pc88pcm2->initialize_sound(rate, 8000);
#endif
}

uint16_t* VM::create_sound(int* extra_frames)
{
	return pc88event->create_sound(extra_frames);
}

int VM::get_sound_buffer_ptr()
{
	return pc88event->get_sound_buffer_ptr();
}

#ifdef USE_SOUND_VOLUME
void VM::set_sound_device_volume(int ch, int decibel_l, int decibel_r)
{
	if(ch-- == 0) {
		pc88opn->set_volume(0, decibel_l, decibel_r);
	} else if(ch-- == 0) {
		pc88opn->set_volume(1, decibel_l, decibel_r);
#ifdef SUPPORT_PC88_OPNA
	} else if(ch-- == 0) {
		pc88opn->set_volume(2, decibel_l, decibel_r);
	} else if(ch-- == 0) {
		pc88opn->set_volume(3, decibel_l, decibel_r);
#endif
#ifdef SUPPORT_PC88_SB2
	} else if(ch-- == 0) {
		if(pc88sb2 != NULL) {
			pc88sb2->set_volume(0, decibel_l, decibel_r);
		}
	} else if(ch-- == 0) {
		if(pc88sb2 != NULL) {
			pc88sb2->set_volume(1, decibel_l, decibel_r);
		}
	} else if(ch-- == 0) {
		if(pc88sb2 != NULL) {
			pc88sb2->set_volume(2, decibel_l, decibel_r);
		}
	} else if(ch-- == 0) {
		if(pc88sb2 != NULL) {
			pc88sb2->set_volume(3, decibel_l, decibel_r);
		}
#endif
#ifdef SUPPORT_PC88_PCG8100
	} else if(ch-- == 0) {
		pc88pcm0->set_volume(0, decibel_l, decibel_r);
		pc88pcm1->set_volume(0, decibel_l, decibel_r);
		pc88pcm2->set_volume(0, decibel_l, decibel_r);
#endif
	} else if(ch-- == 0) {
		pc88pcm->set_volume(0, decibel_l, decibel_r);
	} else if(ch-- == 0) {
		pc88noise_seek->set_volume(0, decibel_l, decibel_r);
		pc88noise_head_down->set_volume(0, decibel_l, decibel_r);
		pc88noise_head_up->set_volume(0, decibel_l, decibel_r);
	}
}
#endif

// ----------------------------------------------------------------------------
// notify key
// ----------------------------------------------------------------------------

void VM::key_down(int code, bool repeat)
{
	pc88->key_down(code, repeat);
}

void VM::key_up(int code)
{
}

// ----------------------------------------------------------------------------
// user interface
// ----------------------------------------------------------------------------

void VM::open_floppy_disk(int drv, const _TCHAR* file_path, int bank)
{
	pc88fdc_sub->open_disk(drv, file_path, bank);
}

void VM::close_floppy_disk(int drv)
{
	pc88fdc_sub->close_disk(drv);
}

bool VM::is_floppy_disk_inserted(int drv)
{
	return pc88fdc_sub->is_disk_inserted(drv);
}

void VM::is_floppy_disk_protected(int drv, bool value)
{
	pc88fdc_sub->is_disk_protected(drv, value);
}

bool VM::is_floppy_disk_protected(int drv)
{
	return pc88fdc_sub->is_disk_protected(drv);
}

uint32_t VM::is_floppy_disk_accessed()
{
	return pc88fdc_sub->read_signal(0);
}

void VM::play_tape(int drv, const _TCHAR* file_path)
{
	pc88->play_tape(file_path);
}

void VM::rec_tape(int drv, const _TCHAR* file_path)
{
	pc88->rec_tape(file_path);
}

void VM::close_tape(int drv)
{
	pc88->close_tape();
}

bool VM::is_tape_inserted(int drv)
{
	return pc88->is_tape_inserted();
}

bool VM::is_frame_skippable()
{
//	return event->is_frame_skippable();
	return pc88->is_frame_skippable();
}

void VM::update_config()
{
	if(boot_mode != config.boot_mode) {
		// boot mode is changed !!!
		boot_mode = config.boot_mode;
		reset();
	} else {
		for(DEVICE* device = first_device; device; device = device->next_device) {
			device->update_config();
		}
	}
}

#define STATE_VERSION	7

void VM::save_state(FILEIO* state_fio)
{
	state_fio->FputUint32(STATE_VERSION);
	
	for(DEVICE* device = first_device; device; device = device->next_device) {
		device->save_state(state_fio);
	}
	state_fio->FputInt32(boot_mode);
}

bool VM::load_state(FILEIO* state_fio)
{
	if(state_fio->FgetUint32() != STATE_VERSION) {
		return false;
	}
	for(DEVICE* device = first_device; device; device = device->next_device) {
		if(!device->load_state(state_fio)) {
			return false;
		}
	}
	boot_mode = state_fio->FgetInt32();
	return true;
}

