reading php terminal-gameboy-emulator
Post on 14-Apr-2017
2.944 Views
Preview:
TRANSCRIPT
Reading php-terminal-gameboy-emulator
Digital Circus, Inc. HASEGAWA Tomki
HASEGAWA Tomoki
@tomzoh
Web / iOS App Development,
Rental Kart Race, Beer, IoT crafting, …
hasegawatomoki
Digital Circus, Inc. Vice-master CTO
Tokyo, Japan
Interests
・Web Development
・Mobile Apps Development
・ Service
（ ）
（iOS, Android)
（http://appbuilder.jp）
Twitter: @tomzoh
Twitter: @tomzoh
Today’s theme
Reading php-terminal-gameboy-emulator
Today’s theme
Reading php-terminal-gameboy-emulator
By Transfrom JPEG version and remove white background. Original by Evan-Amos. - Media:Game-Boy-FL.jpg, Public Domain, https://commons.wikimedia.org/w/index.php?curid=37808150
23, February
😮
😮
😮
Awesome!!
😮
Awesome!!
Waste of talent!!
😮
Awesome!!
Waste of talent!! Cool!!
Source Files
Source Files
It’s PHP !
Source Files
It’s PHP !
We can read it.
Source Files
It’s PHP !
Yes, We can!
We can read it.
Source Files
It’s PHP !
Yes, We can!
Yes, We can!
We can read it.
Today’s theme
Reading php-terminal-gameboy-emulator
Components of GAMEBOY
• CPU / Memory • Display • Sound • Buttons • Communication Port
Components of GAMEBOY
• CPU / Memory • Display • Sound • Buttons • Communication Port
Buttons
Buttons - Keyboard.php<?php namespace GameBoy;
class Keyboard { public $core; public $file; public $keyPressing = null; public $started = false;
public function __construct(Core $core) { $this->core = $core; exec('stty -icanon'); $this->file = fopen('php://stdin', 'r'); stream_set_blocking($this->file, false); }
public function check() { $key = fread($this->file, 1);
Buttons - Keyboard.php<?php namespace GameBoy;
class Keyboard { public $core; public $file; public $keyPressing = null; public $started = false;
public function __construct(Core $core) { $this->core = $core; exec('stty -icanon'); $this->file = fopen('php://stdin', 'r'); stream_set_blocking($this->file, false); }
public function check() { $key = fread($this->file, 1);
How to sense buttons
How to sense buttons
$this->file = fopen('php://stdin', 'r');
How to sense buttons
$this->file = fopen('php://stdin', 'r');
$key = fread($this->file, 1);
Simple
CPU / Memory
CPU
SHARP LR35902 instruction set
http://www.pastraiser.com/cpu/gameboy/gameboy_opcodes.html
1byte instructions Prefix CB instructions
144 instructions 256 instructions+
= 400 instructions
SHARP LR35902 resistors
http://www.pastraiser.com/cpu/gameboy/gameboy_opcodes.html
15 … 8 7 … 0A FB CH L
15 … 8 7 … 0SP (Stack Pointer)
PC (Program Counter)
8bit / 16bit resistors
16bit resistors
Flag registor
7 6 5 4 3 2 1 0Z N H C 0 0 0 0
• Z - Zero Flag • N - Subtract Flag • H - Half Carry Flag • C - Carry Flag • 0 - Not uses, always zero
Instruction in memory
0x0000 0x0001 0x0002 0x003 0x004 0x005 0x0301
0x01 0x01 0x03 0x3e 0x99 0x02 0x99
LD BC, d16 0x0301 LD A, d8 0x99 LD (BC), A
Data
Instruction
x0 x1 x2 xE
0x 3xLD BC, d16
3 12 - - - -
NOP 1 4
- - - -
LD (BC), A 1 8
- - - -
Address
LD A, d8 2 8
- - - -
Instruction in memory
0x0000 0x0001 0x0002 0x003 0x004 0x005 0x0301
0x01 0x01 0x03 0x3e 0x99 0x02 0x99
LD BC, d16 0x0301 LD A, d8 0x99 LD (BC), A
Data
Instruction
x0 x1 x2 xE
0x 3xLD BC, d16
3 12 - - - -
NOP 1 4
- - - -
LD (BC), A 1 8
- - - -Length in bytes
Address
LD A, d8 2 8
- - - -
Instruction in memory
0x0000 0x0001 0x0002 0x003 0x004 0x005 0x0301
0x01 0x01 0x03 0x3e 0x99 0x02 0x99
LD BC, d16 0x0301 LD A, d8 0x99 LD (BC), A
Data
Instruction
x0 x1 x2 xE
0x 3xLD BC, d16
3 12 - - - -
NOP 1 4
- - - -
LD (BC), A 1 8
- - - -Duration in cyclesLength in bytes
Address
LD A, d8 2 8
- - - -
Instruction in memory
0x0000 0x0001 0x0002 0x003 0x004 0x005 0x0301
0x01 0x01 0x03 0x3e 0x99 0x02 0x99
LD BC, d16 0x0301 LD A, d8 0x99 LD (BC), A
Data
Instruction
x0 x1 x2 xE
0x 3xLD BC, d16
3 12 - - - -
NOP 1 4
- - - -
LD (BC), A 1 8
- - - -Duration in cycles
Flags affected
Length in bytes
Address
LD A, d8 2 8
- - - -
Instruction in memory
0x0000 0x0001 0x0002 0x003 0x004 0x005 0x0301
0x01 0x01 0x03 0x3e 0x99 0x02 0x99
LD BC, d16 0x0301 LD A, d8 0x99 LD (BC), A
Data
Instruction
x0 x1 x2 xE
0x 3xLD BC, d16
3 12 - - - -
NOP 1 4
- - - -
LD (BC), A 1 8
- - - -
Address
LD A, d8 2 8
- - - -
Instruction in memory
0x0000 0x0001 0x0002 0x003 0x004 0x005 0x0301
0x01 0x01 0x03 0x3e 0x99 0x02 0x99
LD BC, d16 0x0301 LD A, d8 0x99 LD (BC), A
Data
Instruction
x0 x1 x2 xE
0x 3xLD BC, d16
3 12 - - - -
NOP 1 4
- - - -
LD (BC), A 1 8
- - - -
Address
LD A, d8 2 8
- - - -
PC (Program Counter)
Instruction in memory
0x0000 0x0001 0x0002 0x003 0x004 0x005 0x0301
0x01 0x01 0x03 0x3e 0x99 0x02 0x99
LD BC, d16 0x0301 LD A, d8 0x99 LD (BC), A
Data
Instruction
Load 0x0301 into BC resistor
x0 x1 x2 xE
0x 3xLD BC, d16
3 12 - - - -
NOP 1 4
- - - -
LD (BC), A 1 8
- - - -
Address
LD A, d8 2 8
- - - -
PC (Program Counter)
Instruction in memory
0x0000 0x0001 0x0002 0x003 0x004 0x005 0x0301
0x01 0x01 0x03 0x3e 0x99 0x02 0x99
LD BC, d16 0x0301 LD A, d8 0x99 LD (BC), A
Data
Instruction
x0 x1 x2 xE
0x 3xLD BC, d16
3 12 - - - -
NOP 1 4
- - - -
LD (BC), A 1 8
- - - -
Address
LD A, d8 2 8
- - - -
PC (Program Counter)
Instruction in memory
0x0000 0x0001 0x0002 0x003 0x004 0x005 0x0301
0x01 0x01 0x03 0x3e 0x99 0x02 0x99
LD BC, d16 0x0301 LD A, d8 0x99 LD (BC), A
Data
Instruction
x0 x1 x2 xE
0x 3xLD BC, d16
3 12 - - - -
NOP 1 4
- - - -
LD (BC), A 1 8
- - - -
Address
LD A, d8 2 8
- - - -
Load 0x99 into A resistor
PC (Program Counter)
Instruction in memory
0x0000 0x0001 0x0002 0x003 0x004 0x005 0x0301
0x01 0x01 0x03 0x3e 0x99 0x02 0x99
LD BC, d16 0x0301 LD A, d8 0x99 LD (BC), A
Data
Instruction
x0 x1 x2 xE
0x 3xLD BC, d16
3 12 - - - -
NOP 1 4
- - - -
LD (BC), A 1 8
- - - -
Address
LD A, d8 2 8
- - - -
PC (Program Counter)
Instruction in memory
0x0000 0x0001 0x0002 0x003 0x004 0x005 0x0301
0x01 0x01 0x03 0x3e 0x99 0x02 0x99
LD BC, d16 0x0301 LD A, d8 0x99 LD (BC), A
Data
Instruction
Load A resistor’s value into memory indicates with BC resistor
x0 x1 x2 xE
0x 3xLD BC, d16
3 12 - - - -
NOP 1 4
- - - -
LD (BC), A 1 8
- - - -
Address
LD A, d8 2 8
- - - -
PC (Program Counter)
CPU - Opcode.php<?php namespace GameBoy;
class Opcode { public $functionsArray = [];
public function __construct() { //NOP //#0x00: $this->functionsArray[] = function ($parentObj) { //Do Nothing... }; //LD BC, nn //#0x01: $this->functionsArray[] = function ($parentObj) {
CPU - Opcode.php<?php namespace GameBoy;
class Opcode { public $functionsArray = [];
public function __construct() { //NOP //#0x00: $this->functionsArray[] = function ($parentObj) { //Do Nothing... }; //LD BC, nn //#0x01: $this->functionsArray[] = function ($parentObj) {
x0 x1 x2
0xLD BC, d16
3 12 - - - -
NOP 1 4
- - - -
LD (BC), A 1 8
- - - -
CPU - Opcode.php<?php namespace GameBoy;
class Opcode { public $functionsArray = [];
public function __construct() { //NOP //#0x00: $this->functionsArray[] = function ($parentObj) { //Do Nothing... }; //LD BC, nn //#0x01: $this->functionsArray[] = function ($parentObj) {
Implementation of 0x00 NOP
x0 x1 x2
0xLD BC, d16
3 12 - - - -
NOP 1 4
- - - -
LD (BC), A 1 8
- - - -
CPU - Opcode.php<?php namespace GameBoy;
class Opcode { public $functionsArray = [];
public function __construct() { //NOP //#0x00: $this->functionsArray[] = function ($parentObj) { //Do Nothing... }; //LD BC, nn //#0x01: $this->functionsArray[] = function ($parentObj) {
x0 x1 x2
0xLD BC, d16
3 12 - - - -
NOP 1 4
- - - -
LD (BC), A 1 8
- - - -
Implementation of 0x01 LD BC, d16
//LD BC, nn //#0x01: $this->functionsArray[] = function ($parentObj) { $parentObj->registerC = $parentObj->memoryReader[$parentObj->programCounter]($parentObj, $parentObj->programCounter); $parentObj->registerB = $parentObj->memoryRead(($parentObj->programCounter + 1) & 0xFFFF);
$parentObj->programCounter = ($parentObj->programCounter + 2) & 0xFFFF; };
Implementation of LD BC, d16
0x0000 0x0001 0x0002 0x003 0x004 0x005 0x0301
0x01 0x01 0x03 0x3e 0x99 0x02 0x99
LD BC, d16 0x0301 LD A, d8 0x99 LD (BC), A
Data
Instruction
Address
PC (Program Counter)
//LD BC, nn //#0x01: $this->functionsArray[] = function ($parentObj) { $parentObj->registerC = $parentObj->memoryReader[$parentObj->programCounter]($parentObj, $parentObj->programCounter); $parentObj->registerB = $parentObj->memoryRead(($parentObj->programCounter + 1) & 0xFFFF);
$parentObj->programCounter = ($parentObj->programCounter + 2) & 0xFFFF; };
Implementation of LD BC, d16
0x0000 0x0001 0x0002 0x003 0x004 0x005 0x0301
0x01 0x01 0x03 0x3e 0x99 0x02 0x99
LD BC, d16 0x0301 LD A, d8 0x99 LD (BC), A
Data
Instruction
Address
PC (Program Counter)
C
//LD BC, nn //#0x01: $this->functionsArray[] = function ($parentObj) { $parentObj->registerC = $parentObj->memoryReader[$parentObj->programCounter]($parentObj, $parentObj->programCounter); $parentObj->registerB = $parentObj->memoryRead(($parentObj->programCounter + 1) & 0xFFFF);
$parentObj->programCounter = ($parentObj->programCounter + 2) & 0xFFFF; };
Implementation of LD BC, d16
0x0000 0x0001 0x0002 0x003 0x004 0x005 0x0301
0x01 0x01 0x03 0x3e 0x99 0x02 0x99
LD BC, d16 0x0301 LD A, d8 0x99 LD (BC), A
Data
Instruction
Address
PC (Program Counter)
B
//LD BC, nn //#0x01: $this->functionsArray[] = function ($parentObj) { $parentObj->registerC = $parentObj->memoryReader[$parentObj->programCounter]($parentObj, $parentObj->programCounter); $parentObj->registerB = $parentObj->memoryRead(($parentObj->programCounter + 1) & 0xFFFF);
$parentObj->programCounter = ($parentObj->programCounter + 2) & 0xFFFF; };
Implementation of LD BC, d16
0x0000 0x0001 0x0002 0x003 0x004 0x005 0x0301
0x01 0x01 0x03 0x3e 0x99 0x02 0x99
LD BC, d16 0x0301 LD A, d8 0x99 LD (BC), A
Data
Instruction
Address
PC (Program Counter)
Implementation of JP a16
x3
cxJP a16 3 16 - - - -
Implementation of JP a16
x3
cxJP a16 3 16 - - - -
Jump to address a16
Implementation of JP a16
x3
cxJP a16 3 16 - - - -
Jump to address a16
0x0000 0x0001 0x0002
0xc3 0x29 0x03
JP a16 0x0329
Data
Instruction
Address
Implementation of JP a16
x3
cxJP a16 3 16 - - - -
Jump to address a16
0x0000 0x0001 0x0002
0xc3 0x29 0x03
JP a16 0x0329
Data
Instruction
Address
Jump to address 0x0329
Implementation of JP a16
x3
cxJP a16 3 16 - - - -
Jump to address a16
//JP nn //#0xC3: $this->functionsArray[] = function ($parentObj) { $parentObj->programCounter = ($parentObj->memoryRead(($parentObj->programCounter + 1) & 0xFFFF) << 8) + $parentObj->memoryReader[$parentObj->programCounter]($parentObj, $parentObj->programCounter); };
0x0000 0x0001 0x0002
0xc3 0x29 0x03
JP a16 0x0329
Data
Instruction
Address
Jump to address 0x0329
Run looppublic function executeIteration() { $op = 0;
while ($this->stopEmulator == 0) { $op = $this->memoryRead($this->programCounter); $this->programCounter = ($this->programCounter + 1) & 0xFFFF; $this->CPUTicks = $this->TICKTable[$op]; $this->OPCODE[$op]($this); $this->updateCore(); } }
Not difficult Simple, Easy
Let’s read php-terminal-gameboy-emulator
Thanks
@tomzoh
WE ARE HIRING Drupal / Mobile App EngineerDigital Circus, Inc. Tokyo, Japan@tomzoh
Links• https://en.wikipedia.org/wiki/Game_Boy
• http://www.pastraiser.com/cpu/gameboy/gameboy_opcodes.html
• http://gbdev.gg8.se/wiki/articles/The_Cartridge_Header
• http://gameboy.mongenel.com/dmg/asmmemmap.html
More FPS?
PHP5.5.30 OSX Native FPS: 4
PHP7.0.1 VirtualBox FPS: 14
Duration in cycles table
<?php namespace GameBoy;
class TickTables { public static $primary = [ //Number of machine cycles for each instruction: /* 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F*/ 1, 3, 2, 2, 1, 1, 2, 1, 5, 2, 2, 2, 1, 1, 2, 1, //0 1, 3, 2, 2, 1, 1, 2, 1, 3, 2, 2, 2, 1, 1, 2, 1, //1 2, 3, 2, 2, 1, 1, 2, 1, 2, 2, 2, 2, 1, 1, 2, 1, //2 2, 3, 2, 2, 3, 3, 3, 1, 2, 2, 2, 2, 1, 1, 2, 1, //3
Duration in cycles table
<?php namespace GameBoy;
class TickTables { public static $primary = [ //Number of machine cycles for each instruction: /* 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F*/ 1, 3, 2, 2, 1, 1, 2, 1, 5, 2, 2, 2, 1, 1, 2, 1, //0 1, 3, 2, 2, 1, 1, 2, 1, 3, 2, 2, 2, 1, 1, 2, 1, //1 2, 3, 2, 2, 1, 1, 2, 1, 2, 2, 2, 2, 1, 1, 2, 1, //2 2, 3, 2, 2, 3, 3, 3, 1, 2, 2, 2, 2, 1, 1, 2, 1, //3
1 machine cycle = 4 clocks
Duration in cycles table
<?php namespace GameBoy;
class TickTables { public static $primary = [ //Number of machine cycles for each instruction: /* 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F*/ 1, 3, 2, 2, 1, 1, 2, 1, 5, 2, 2, 2, 1, 1, 2, 1, //0 1, 3, 2, 2, 1, 1, 2, 1, 3, 2, 2, 2, 1, 1, 2, 1, //1 2, 3, 2, 2, 1, 1, 2, 1, 2, 2, 2, 2, 1, 1, 2, 1, //2 2, 3, 2, 2, 3, 3, 3, 1, 2, 2, 2, 2, 1, 1, 2, 1, //3
1 machine cycle = 4 clocks
x4
cxCALL NZ,a16
3 24/12 - - - -
Duration in cycles table
<?php namespace GameBoy;
class TickTables { public static $primary = [ //Number of machine cycles for each instruction: /* 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F*/ 1, 3, 2, 2, 1, 1, 2, 1, 5, 2, 2, 2, 1, 1, 2, 1, //0 1, 3, 2, 2, 1, 1, 2, 1, 3, 2, 2, 2, 1, 1, 2, 1, //1 2, 3, 2, 2, 1, 1, 2, 1, 2, 2, 2, 2, 1, 1, 2, 1, //2 2, 3, 2, 2, 3, 3, 3, 1, 2, 2, 2, 2, 1, 1, 2, 1, //3
1 machine cycle = 4 clocks
x4
cxCALL NZ,a16
3 24/12 - - - -Call address a16 if A resistor
is zero. It takes 24 clocks.
5月 チケット販売開始 /トーク募集開始6月上旬 トーク募集〆切 6月下旬 タイムテーブル決定
iOS Developers Conference Japan 2016 2016.08.20 https://iosdc.jp
スポンサー企業さま、大絶賛募集中
top related