和製MESSでMSX1 その６

ほとんどの実装はSC-3000そのままなのですが、PSGとJOYSTICKの部分は、ほとんどPHC-25そのままです(笑)

msx1.cpp

/*
	ASCII MSX1 Emulator 'yaMSX1'
	Skelton for retropc emulator

	Author : tanam
	Date   : 2013.06.29-

	[ virtual machine ]
*/

#include "msx1.h"
#include "../../emu.h"
#include "../device.h"
#include "../event.h"

#include "../datarec.h"
#include "../i8251.h"
#include "../i8255.h"
#include "../io.h"
#include "../ym2203.h"
#include "../tms9918a.h"
#include "../upd765a.h"
#include "../z80.h"

#include "joystick.h"
#include "keyboard.h"
#include "memory.h"

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

VM::VM(EMU* parent_emu) : emu(parent_emu)
{
	// create devices
	first_device = last_device = NULL;
	dummy = new DEVICE(this, emu);	// must be 1st device
	event = new EVENT(this, emu);	// must be 2nd device
	
///	drec = new DATAREC(this, emu);
	sio = new I8251(this, emu);
	pio_k = new I8255(this, emu);
	pio_f = new I8255(this, emu);
	io = new IO(this, emu);
	psg = new YM2203(this, emu);
	vdp = new TMS9918A(this, emu);
///	fdc = new UPD765A(this, emu);
	cpu = new Z80(this, emu);
	
	joystick = new JOYSTICK(this, emu);
	keyboard = new KEYBOARD(this, emu);
	memory = new MEMORY(this, emu);
	
	// set contexts
	event->set_context_cpu(cpu);
	event->set_context_sound(psg);
	
///	drec->set_context_out(pio_k, SIG_I8255_PORT_B, 0x80);
	pio_k->set_context_port_c(keyboard, SIG_KEYBOARD_COLUMN, 0x0f, 0);
///	pio_k->set_context_port_c(drec, SIG_DATAREC_REMOTE, 0x08, 0);
///	pio_k->set_context_port_c(drec, SIG_DATAREC_OUT, 0x10, 0);
///	pio_f->set_context_port_c(fdc, SIG_UPD765A_MOTOR_NEG, 2, 0);
///	pio_f->set_context_port_c(fdc, SIG_UPD765A_TC, 4, 0);
///	pio_f->set_context_port_c(fdc, SIG_UPD765A_RESET, 8, 0);
	pio_f->set_context_port_a(memory, SIG_MEMORY_SEL, 0xff, 0);
	vdp->set_context_irq(cpu, SIG_CPU_IRQ, 1);
///	fdc->set_context_irq(pio_f, SIG_I8255_PORT_A, 1);
///	fdc->set_context_index(pio_f, SIG_I8255_PORT_A, 4);
#ifdef _FDC_DEBUG_LOG
	fdc->set_context_cpu(cpu);
#endif
	joystick->set_context_psg(psg);	
	keyboard->set_context_cpu(cpu);
	keyboard->set_context_pio(pio_k);
	
	// cpu bus
	cpu->set_context_mem(memory);
	cpu->set_context_io(io);
	cpu->set_context_intr(dummy);
	
	// i/o bus
	io->set_iomap_range_rw(0x98, 0x99, vdp);
	io->set_iomap_range_rw(0xa9, 0xab, pio_k);
///	io->set_iomap_range_rw(0xe0, 0xe3, fdc);
	io->set_iomap_range_rw(0xa8, 0xa8, pio_f);
	io->set_iomap_range_rw(0x80, 0x88, sio);

	io->set_iomap_alias_w(0xa0, psg, 0);	// PSG ch
	io->set_iomap_alias_w(0xa1, psg, 1);	// PSG data
	io->set_iomap_alias_r(0xa2, psg, 1);	// PSG data

	// 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();
	}
}

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

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

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

int VM::access_lamp()
{
	return 0;
///	uint32 status = fdc->read_signal(0);
///	return (status & (1 | 4)) ? 1 : (status & (2 | 8)) ? 2 : 0;
}

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

void VM::initialize_sound(int rate, int samples)
{
	// init sound manager
	event->initialize_sound(rate, samples);
	
	// init sound gen
	psg->init(rate, 3579545, 8000, 0, 0);
}

uint16* VM::create_sound(int* extra_frames)
{
	return event->create_sound(extra_frames);
}

int VM::sound_buffer_ptr()
{
	return event->sound_buffer_ptr();
}

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

void VM::open_cart(int drv, _TCHAR* file_path)
{
	if(drv == 0) {
		memory->open_cart(file_path);
		reset();
	}
}

void VM::close_cart(int drv)
{
	if(drv == 0) {
		memory->close_cart();
		reset();
	}
}

bool VM::cart_inserted(int drv)
{
	if(drv == 0) {
		return memory->cart_inserted();
	} else {
		return false;
	}
}

void VM::open_disk(int drv, _TCHAR* file_path, int offset)
{
	fdc->open_disk(drv, file_path, offset);
}

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

bool VM::disk_inserted(int drv)
{
	return fdc->disk_inserted(drv);
}

void VM::play_tape(_TCHAR* file_path)
{
	drec->play_tape(file_path);
}

void VM::rec_tape(_TCHAR* file_path)
{
	drec->rec_tape(file_path);
}

void VM::close_tape()
{
	drec->close_tape();
}

bool VM::tape_inserted()
{
	return drec->tape_inserted();
}

bool VM::now_skip()
{
	return event->now_skip();
}

void VM::update_config()
{
	for(DEVICE* device = first_device; device; device = device->next_device) {
		device->update_config();
	}
}

msx1.h

/*
	ASCII MSX1 Emulator 'yaMSX1'
	Skelton for retropc emulator

	Author : tanam
	Date   : 2013.06.29-

	[ virtual machine ]
*/

#ifndef _MSX1_H_
#define _MSX1_H_

#define DEVICE_NAME		"ASCII MSX1"
#define CONFIG_NAME		"msx1"
#define CONFIG_VERSION		0x02

// device informations for virtual machine
#define FRAMES_PER_SEC		60
#define LINES_PER_FRAME		262
#define CPU_CLOCKS		3579545
#define SCREEN_WIDTH		256
#define SCREEN_HEIGHT		192
#define TMS9918A_VRAM_SIZE	0x4000
#define TMS9918A_LIMIT_SPRITES
#define MAX_DRIVE		4

// device informations for win32
#define MIN_WINDOW_WIDTH	320
#define USE_CART1
#define USE_FD1
#define USE_TAPE
#define USE_ALT_F10_KEY
#define USE_AUTO_KEY		5
#define USE_AUTO_KEY_RELEASE	8
#define USE_ACCESS_LAMP

#include "../../common.h"

class EMU;
class DEVICE;
class EVENT;

class DATAREC;
class I8251;
class I8255;
class IO;
class YM2203;
class TMS9918A;
class UPD765A;
class Z80;

class JOYSTICK;
class KEYBOARD;
class MEMORY;

class VM
{
protected:
	EMU* emu;
	
	// devices
	EVENT* event;
	
	DATAREC* drec;
	I8251* sio;
	I8255* pio_k;
	I8255* pio_f;
	IO* io;
	YM2203* psg;
	TMS9918A* vdp;
	UPD765A* fdc;
	Z80* cpu;
	
	JOYSTICK* joystick;
	KEYBOARD* keyboard;
	MEMORY* memory;
	
public:
	// ----------------------------------------
	// initialize
	// ----------------------------------------
	
	VM(EMU* parent_emu);
	~VM();
	
	// ----------------------------------------
	// for emulation class
	// ----------------------------------------
	
	// drive virtual machine
	void reset();
	void run();
	
	// draw screen
	void draw_screen();
	int access_lamp();
	
	// sound generation
	void initialize_sound(int rate, int samples);
	uint16* create_sound(int* extra_frames);
	int sound_buffer_ptr();
		
	// user interface
	void open_cart(int drv, _TCHAR* file_path);
	void close_cart(int drv);
	bool cart_inserted(int drv);
	void open_disk(int drv, _TCHAR* file_path, int offset);
	void close_disk(int drv);
	bool disk_inserted(int drv);
	void play_tape(_TCHAR* file_path);
	void rec_tape(_TCHAR* file_path);
	void close_tape();
	bool tape_inserted();
	bool now_skip();
	
	void update_config();
	
	// ----------------------------------------
	// for each device
	// ----------------------------------------
	
	// devices
	DEVICE* get_device(int id);
	DEVICE* dummy;
	DEVICE* first_device;
	DEVICE* last_device;
};

#endif

joystick.cpp

/*
	ASCII MSX1 Emulator 'yaMSX1'
	Skelton for retropc emulator

	Author : tanam
	Date   : 2013.06.29-

	[ joystick ]
*/

#include "joystick.h"
#include "../ym2203.h"

void JOYSTICK::initialize()
{
	joy_stat = emu->joy_buffer();
	
	// register event to update the key status
	register_frame_event(this);
}

void JOYSTICK::event_frame()
{
///	d_psg->write_signal(SIG_YM2203_PORT_A, ~(joy_stat[0] & 0x1f), 0xff);
	d_psg->write_signal(SIG_YM2203_PORT_A, ~(joy_stat[0] & 0x3f), 0xff);
	d_psg->write_signal(SIG_YM2203_PORT_B, ~(joy_stat[1] & 0x1f), 0xff);
}