SVI-3x8エミュレータをつくる その３

メモリーマップを見直して以下に対応しました。

https://www.msx.org/news/en/nyyrikki-msx-rom-loader-svi

msx_ex.cpp

/*
	Common Source Code Project
	SVI-3x8

	Origin : src/vm/msx/msx_ex.cpp

	modified by tanam
	Date   : 2018.12.09-

	[ virtual machine ]
*/

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

#include "../datarec.h"
#include "../i8255.h"
#include "../io.h"
#include "../noise.h"
#include "../not.h"
#include "../ay_3_891x.h"
#include "../pcm1bit.h"
#include "../tms9918a.h"
#include "../z80.h"

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

#include "joystick.h"
#include "keyboard.h"
#include "memory_ex.h"
#ifdef USE_PRINTER
#include "printer.h"
#include "../prnfile.h"
#endif

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

VM::VM(EMU* parent_emu) : VM_TEMPLATE(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);
	drec->set_context_noise_play(new NOISE(this, emu));
	drec->set_context_noise_stop(new NOISE(this, emu));
	drec->set_context_noise_fast(new NOISE(this, emu));
	pio = new I8255(this, emu);
	io = new IO(this, emu);
	not_remote = new NOT(this, emu);
	psg = new AY_3_891X(this, emu);
	pcm = new PCM1BIT(this, emu);
	vdp = new TMS9918A(this, emu);
	cpu = new Z80(this, emu);
	
	joystick = new JOYSTICK(this, emu);
	keyboard = new KEYBOARD(this, emu);
	memory = new MEMORY_EX(this, emu);
#ifdef USE_PRINTER
	printer = new PRINTER(this, emu);
#endif
	
	// set contexts
	event->set_context_cpu(cpu);
	event->set_context_sound(psg);
	event->set_context_sound(pcm);
	event->set_context_sound(drec);
	event->set_context_sound(drec->get_context_noise_play());
	event->set_context_sound(drec->get_context_noise_stop());
	event->set_context_sound(drec->get_context_noise_fast());	
	drec->set_context_ear(psg, SIG_AY_3_891X_PORT_A, 0x80);
	pio->set_context_port_c(keyboard, SIG_KEYBOARD_COLUMN, 0x0f, 0);
	pio->set_context_port_c(not_remote, SIG_NOT_INPUT, 0x10, 0);
	not_remote->set_context_out(drec, SIG_DATAREC_REMOTE, 1);
	pio->set_context_port_c(drec, SIG_DATAREC_MIC, 0x20, 0);
	pio->set_context_port_c(pcm, SIG_PCM1BIT_SIGNAL, 0x80, 0);
	psg->set_context_port_b(memory, SIG_MEMORY_SEL, 0x0f, 0);
	vdp->set_context_irq(cpu, SIG_CPU_IRQ, 1);
	
	joystick->set_context_psg(psg);
	joystick->set_context_memory(memory);
	keyboard->set_context_pio(pio);
	
#ifdef USE_PRINTER
	if(config.printer_type == 0) {  
		printer->set_context_prn(new PRNFILE(this, emu));
	} else {
		printer->set_context_prn(printer);
	}
#endif

	// cpu bus
	cpu->set_context_mem(memory);
	cpu->set_context_io(io);
	cpu->set_context_intr(dummy);
#ifdef USE_DEBUGGER
	cpu->set_context_debugger(new DEBUGGER(this, emu));
#endif
	
	// i/o bus
	io->set_iomap_range_w(0x80, 0x81, vdp);
	io->set_iomap_range_r(0x84, 0x85, vdp);
	io->set_iomap_range_w(0x94, 0x97, pio);
	io->set_iomap_range_r(0x99, 0x9a, pio);
	io->set_iomap_alias_w(0x88, psg, 0);	// PSG ch
	io->set_iomap_alias_w(0x8c, psg, 1);	// PSG data
	io->set_iomap_alias_r(0x90, psg, 1);	// STICK
	io->set_iomap_alias_rw(0x98, memory, 0);	// STRIG
#ifdef USE_PRINTER
	io->set_iomap_range_rw(0x10, 0x11, printer);
#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();
	}
}

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

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

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

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

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

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

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

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

int VM::get_sound_buffer_ptr()
{
	return event->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) {
	psg->set_volume(1, decibel_l, decibel_r);
	} else if(ch == 1) {
		pcm->set_volume(0, decibel_l, decibel_r);
	} else if(ch == 2) {
		drec->set_volume(0, decibel_l, decibel_r);
	} else if(ch == 6) {
		drec->get_context_noise_play()->set_volume(0, decibel_l, decibel_r);
		drec->get_context_noise_stop()->set_volume(0, decibel_l, decibel_r);
		drec->get_context_noise_fast()->set_volume(0, decibel_l, decibel_r);
	}
}
#endif

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

void VM::open_cart(int drv, const _TCHAR* file_path)
{
	if(drv == 0) {
//		slot_cart[drv]->open_cart(file_path);
//		memory->set_context_slot(MAINROM_SLOT, slot_cart[0]);
		memory->open_cart(file_path);
	}

	reset();
}

void VM::close_cart(int drv)
{
	if(drv == 0) {
//		slot_cart[drv]->close_cart();
//		memory->set_context_slot(MAINROM_SLOT, slot_mainrom);
		memory->close_cart();
	}
	reset();
}

bool VM::is_cart_inserted(int drv)
{
	if(drv == 0) {
//		return slot_cart[drv]->is_cart_inserted();
		return memory->is_cart_inserted();
	} else {
		return false;
	}
}

void VM::play_tape(int drv, const _TCHAR* file_path)
{
	bool remote = drec->get_remote();
	
	if(drec->play_tape(file_path) && remote) {
		// if machine already sets remote on, start playing now
		push_play(drv);
	}
}

void VM::rec_tape(int drv, const _TCHAR* file_path)
{
	bool remote = drec->get_remote();
	
	if(drec->rec_tape(file_path) && remote) {
		// if machine already sets remote on, start recording now
		push_play(drv);
	}
}

void VM::close_tape(int drv)
{
	emu->lock_vm();
	drec->close_tape();
	emu->unlock_vm();
	drec->set_remote(false);
}

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

bool VM::is_tape_playing(int drv)
{
	return drec->is_tape_playing();
}

bool VM::is_tape_recording(int drv)
{
	return drec->is_tape_recording();
}

int VM::get_tape_position(int drv)
{
	return drec->get_tape_position();
}

const _TCHAR* VM::get_tape_message(int drv)
{
	return drec->get_message();
}

void VM::push_play(int drv)
{
	drec->set_remote(false);
	drec->set_ff_rew(0);
	drec->set_remote(true);
}

void VM::push_stop(int drv)
{
	drec->set_remote(false);
}

void VM::push_fast_forward(int drv)
{
	drec->set_remote(false);
	drec->set_ff_rew(1);
	drec->set_remote(true);
}

void VM::push_fast_rewind(int drv)
{
	drec->set_remote(false);
	drec->set_ff_rew(-1);
	drec->set_remote(true);
}

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

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

#define STATE_VERSION	5

bool VM::process_state(FILEIO* state_fio, bool loading)
{
	if(!state_fio->StateCheckUint32(STATE_VERSION)) {
		return false;
	}
	for(DEVICE* device = first_device; device; device = device->next_device) {
		const char *name = typeid(*device).name() + 6; // skip "class "
		int len = strlen(name);
		
		if(!state_fio->StateCheckInt32(len)) {
			return false;
		}
		if(!state_fio->StateCheckBuffer(name, len, 1)) {
			return false;
		}
		if(!device->process_state(state_fio, loading)) {
			return false;
		}
	}
	return true;
}

memory_ex.h

/*
	Common Source Code Project
	SVI-3x8

	Origin : src/vm/msx/memory.h

	modified by tanam
	Date   : 2018.12.09-

	[ memory ]
*/

#ifndef _MEMORY_EX_H_
#define _MEMORY_EX_H_

#include "../vm.h"
#include "../../emu.h"
#include "../device.h"

#define SIG_MEMORY_SEL	0

// memory bus
class MEMORY_EX : public DEVICE
{
private:
	uint8_t* wbank[8];
	uint8_t* rbank[8];
	uint8_t wdmy[0x2000];
	uint8_t rdmy[0x2000];
	uint8_t bio[0x8000];  /* BANK01 */
	uint8_t ram[0x8000];  /* BANK02 */
	uint8_t rom[0x8000];  /* BANK11 */
	uint8_t r12[0x8000];  /* BANK12 */
	uint8_t r21[0x8000];  /* BANK21 */
	uint8_t r22[0x8000];  /* BANK22 */
	uint8_t r31[0x8000];  /* BANK31 */
	uint8_t r32[0x8000];  /* BANK32 */
	bool inserted;
	uint8_t strig;
	
public:
	MEMORY_EX(VM_TEMPLATE* parent_vm, EMU* parent_emu) : DEVICE(parent_vm, parent_emu)
	{
		set_device_name(_T("Memory Bus"));
		strig=0xff;
	}
	~MEMORY_EX() {}
	
	// common functions
	void initialize();
	void reset();
	void write_data8(uint32_t addr, uint32_t data);
	uint32_t read_data8(uint32_t addr);
	uint32_t fetch_op(uint32_t addr, int* wait);
	bool process_state(FILEIO* state_fio, bool loading);
	void write_signal(int id, uint32_t data, uint32_t mask);
	uint32_t read_io8(uint32_t addr)
	{
		return strig;
	}
	void write_io8(uint32_t addr, uint32_t data)
	{
		strig = data;
	}
	// unique functions
	void open_cart(const _TCHAR *file_path);
	void close_cart();
	bool is_cart_inserted()
	{
		return inserted;
	}
	bool load_cart(const _TCHAR *file_path/*, uint8_t *rom*/);
};

#endif

memory_ex.cpp

/*
	Common Source Code Project
	SVI-3x8

	Origin : src/vm/msx/memory_ex.cpp

	modified by tanam
	Date   : 2018.12.09-

	[ memory ]
*/

#include "memory_ex.h"

#define EVENT_CLOCK	0

#define SET_BANK(s, e, w, r) { \
	int sb = (s) >> 13, eb = (e) >> 13; \
	for(int i = sb; i <= eb; i++) { \
		if((w) == wdmy) { \
			wbank[i] = wdmy; \
		} else { \
			wbank[i] = (w) + 0x2000 * (i - sb); \
		} \
		if((r) == rdmy) { \
			rbank[i] = rdmy; \
		} else { \
			rbank[i] = (r) + 0x2000 * (i - sb); \
		} \
	} \
}

bool MEMORY_EX::load_cart(const _TCHAR *file_path)
{
	bool result = false;
	FILEIO* fio = new FILEIO();
	if(fio->Fopen(file_path, FILEIO_READ_BINARY)) {
		memset(rom, 0xff, sizeof(rom));
		fio->Fread(rom, sizeof(rom), 1);
		fio->Fread(r12, sizeof(r12), 1);
		SET_BANK(0x0000, 0x7fff, wdmy, rom);
		SET_BANK(0x8000, 0xffff, ram, ram);
		fio->Fclose();
		result = true;
	}
	delete fio;
	return result;
}

void MEMORY_EX::open_cart(const _TCHAR *file_path)
{
	if(load_cart(file_path)) {
		inserted = true;
	}
}

void MEMORY_EX::close_cart()
{
	SET_BANK(0x0000, 0x7fff, wdmy, bio);
	SET_BANK(0x8000, 0xffff, ram, ram);
	inserted = false;
}

// memory bus
void MEMORY_EX::initialize()
{
	memset(bio, 0xff, sizeof(bio));
	memset(rdmy, 0xff, sizeof(rdmy));
	memset(wdmy, 0xff, sizeof(wdmy));
	FILEIO* fio = new FILEIO();
	if((fio->Fopen(create_local_path(_T("SVI318.ROM")), FILEIO_READ_BINARY)) ||
	   (fio->Fopen(create_local_path(_T("SVI328.ROM")), FILEIO_READ_BINARY)) ||
	   (fio->Fopen(create_local_path(_T("SVI328a.ROM")), FILEIO_READ_BINARY))) {
		fio->Fread(bio, sizeof(bio), 1);
		fio->Fclose();
	}
	delete fio;	
	close_cart();
}

void MEMORY_EX::reset()
{
	if (!inserted) {
		memset(rom, 0xff, sizeof(rom));
		memset(r12, 0xff, sizeof(r12));
	}
	memset(ram, 0, sizeof(ram));
	memset(r21, 0, sizeof(r21));
	memset(r22, 0, sizeof(r22));
	memset(r31, 0, sizeof(r31));
	memset(r32, 0, sizeof(r32));
	return;
}

void MEMORY_EX::write_data8(uint32_t addr, uint32_t data)
{
	wbank[addr >> 13][addr & 0x1fff] = data;
}

uint32_t MEMORY_EX::read_data8(uint32_t addr)
{

	return rbank[addr >> 13][addr & 0x1fff];
}

void MEMORY_EX::write_signal(int id, uint32_t data, uint32_t mask) {
	if (data & 16) {
		if (data & 4) {
			SET_BANK(0x8000, 0xffff, ram, ram);
		} else {
			if (data % 2 == 1) {
				SET_BANK(0x8000, 0xffff, r22, r22);
			} else {
				SET_BANK(0x8000, 0xffff, rdmy,r12);
			}
		}
	} else {
		SET_BANK(0x8000, 0xffff, r32, r32);
	}
	data &= 0x0f;
	if (data==3 || data==7) {
		SET_BANK(0x0000, 0x7fff, r31, r31);
	} else if (data==13) {
		SET_BANK(0x0000, 0x7fff, r21, r21);
	} else {
		if (data % 2 == 1) {
			SET_BANK(0x0000, 0x7fff, wdmy,bio);
		} else {
			SET_BANK(0x0000, 0x7fff, wdmy,rom);
		}
	}
	return;
}

uint32_t MEMORY_EX::fetch_op(uint32_t addr, int* wait)
{
	*wait = 1;
	return read_data8(addr);
}

#define STATE_VERSION	1

bool MEMORY_EX::process_state(FILEIO* state_fio, bool loading)
{
	if(!state_fio->StateCheckUint32(STATE_VERSION)) {
		return false;
	}
	if(!state_fio->StateCheckInt32(this_device_id)) {
		return false;
	}
	state_fio->StateValue(inserted);
	// post process
	if(loading) {
		if(inserted) {
			SET_BANK(0x0000, 0x7fff, wdmy, rom);
			SET_BANK(0x8000, 0xffff, ram, ram);
		} else {
			SET_BANK(0x0000, 0x7fff, wdmy, bio);
			SET_BANK(0x8000, 0xffff, ram, ram);
		}
	}
	return true;
}