Chip16 Official thread (Development/Suggestions)

[Prads]

^Looks awesome Ref.

As promised I have released I have released v0.01 of my chip16 compiler. Download link's here: http://code.google.com/p/chip16-dev-kit/

And here's the source code for Mega Man X 16 game:

//Mega Man X 16 Compiler Demo
//Written by Prads

Image imgLogo = "logo.bin", 200, 175;
Image imgStand = "stand.bin", 40, 48;
Image imgShoot = "shoot.bin", 40, 48;
Image imgDash = "dash.bin", 60, 39;
Image imgFly = "fly.bin", 40, 58;
Image imgStormEagle = "stormEagle.bin", 40, 41;
Image imgBullet = "bullet.bin", 4, 4;
Image imgWin = "win.bin", 66, 100;
Image imgLose = "lose.bin", 88, 73;
Image imgMoon = "moon.bin", 100, 102;

ConstString title = "Mega Man X 16 by Prads";
ConstString pressStart = "Press Start";
ConstString win = "You Win";
ConstString lose = "You Lose";

void main() {
	//Gamepad constants
	const UP = 1; const DOWN = 2; const LEFT = 4; const RIGHT = 8;
	const SELECT = 16; const START = 32; const A = 64; const B = 128;
	
	//Flip constants
	const FLIP_NONE = 0; const FLIP_VERTICAL = 1; const FLIP_HORIZONTAL = 2; const FLIP_BOTH = 3;
	
	//Game scenes constants
	const SCENE_START = 0; const SCENE_PLAY = 1; const SCENE_WIN = 2; const SCENE_LOSE = 3;
	
	//Character glide control
	const GLIDE_UP = 0; const GLIDE_DOWN = 1; const GLIDE_NONE = 2;
	
	//Character Bullet constants
	const BULLET_ACTIVE = 0; const BULLET_INACTIVE = 1;
	
	var scene = SCENE_START;	//Current game scene
	
	const PLAYER_STAND = 0; const PLAYER_SHOOT = 1; const PLAYER_DASH = 2; const PLAYER_FLY = 3;
	var playerX = 10; var playerY = 190;	//x and y coordinates of player
	var playerGlide = GLIDE_NONE;	//player glide control
	var playerSpriteType;	//player sprite control
	var playerBulletX; var playerBulletY; var playerBulletCtrl = BULLET_INACTIVE;
	
	var enemyY = 190;	//y coordinate of enemy
	var enemyGlide = GLIDE_UP;	//enemy glide control
	var enemyBulletX; var enemyBulletY; var enemyBulletCtrl = BULLET_INACTIVE;
	var enemyLife = 5;
	
	//Game's main loop
	while (1) {
		ClearScreen;
		
		//Game Scenes
		if (scene == SCENE_START) {		//Start Scene
			Draw(imgLogo, 60, 10);
			Print(title, 60, 200);
			Print(pressStart, 115, 215);
			if (GetController1 & START) {
				scene = SCENE_PLAY;
			}
		} else if (scene == SCENE_PLAY) {	//In Game Scene
			//Draw Background Moon
			Draw(imgMoon, 100, 50);
		
			//Get gamepad buttons
			if (playerGlide == GLIDE_NONE) {
				playerSpriteType = PLAYER_STAND;
			}
			if (playerGlide == GLIDE_NONE) {
				if(GetController1 & UP)) {
					playerGlide = GLIDE_UP;
					playerSpriteType = PLAYER_FLY;
				}
			} else if (playerGlide == GLIDE_UP) {
				if (playerY > 100) {
					playerY = playerY - 1;
				} else {
					playerGlide = GLIDE_DOWN;
				}
			} else {
				if (playerY < 190) {
					playerY = playerY + 1;
				} else {
					playerGlide = GLIDE_NONE;
				}
			}
			
			if (GetController1 & A) {
				if (playerBulletCtrl == BULLET_INACTIVE) {
					playerBulletCtrl = BULLET_ACTIVE;
					playerBulletX = playerX + 48;
					playerBulletY = playerY + 20;
				}
				playerSpriteType = PLAYER_SHOOT;
			} else if (GetController1 & LEFT) {
				playerX = playerX - 1;
				Flip(FLIP_HORIZONTAL);
				playerSpriteType = PLAYER_DASH;
			} else if (GetController1 & RIGHT) {
				playerX = playerX + 1;
				playerSpriteType = PLAYER_DASH;
			}
			
			//Draw Player Sprite
			if (playerSpriteType == PLAYER_STAND) {
				Draw(imgStand, playerX, playerY);
			} else if (playerSpriteType == PLAYER_SHOOT) {
				Draw(imgShoot, playerX, playerY);
			} else if (playerSpriteType == PLAYER_DASH) {
				Draw(imgDash, playerX, playerY);
			} else {
				Draw(imgFly, playerX, playerY);
			}
			
			//Draw Player Bullet
			if (playerBulletCtrl == BULLET_ACTIVE) {
				playerBulletX = playerBulletX + 3;
				if (playerBulletX >= 320) {
					playerBulletCtrl = BULLET_INACTIVE;
				}
				Draw(imgBullet, playerBulletX, playerBulletY); 
			}
			
			//Enemy Glide
			if (enemyGlide == GLIDE_UP) {
				if (enemyY > 100) {
					enemyY = enemyY - 1;
				} else {
					enemyGlide = GLIDE_DOWN;
				}
			} else {
				if (enemyY < 190) {
					enemyY = enemyY + 1;
				} else {
					enemyGlide = GLIDE_UP;
				}
			}
			
			Flip(FLIP_NONE);
			Draw(imgStormEagle, 280, enemyY);	//draw enemy Sprite
			
			//Draw Enemy Bullet
			if (enemyBulletCtrl == BULLET_ACTIVE) {
				enemyBulletX = enemyBulletX - 3;
				if (enemyBulletX <= 0) {
					enemyBulletCtrl = BULLET_INACTIVE;
				}
				Draw(imgBullet, enemyBulletX, enemyBulletY);
			} else {
				enemyBulletCtrl = Rand & 3;
				if (enemyBulletCtrl == BULLET_ACTIVE) {
					enemyBulletX = 280;
					enemyBulletY = enemyY + 20;
				}
			}
			
			//Player Bullet and Enemy Collision
			if (playerBulletCtrl == BULLET_ACTIVE) {
				if ((playerBulletX < 320) && (playerBulletX > 280) && (playerBulletY > enemyY) && (playerBulletY < enemyY + 40)) {
					enemyLife = enemyLife - 1;
					if (enemyLife == 0) {
						scene = SCENE_WIN;
					}
					playerBulletCtrl = BULLET_INACTIVE;
				}
			}
			//Enemy Bullet and Player Collision
			if (enemyBulletCtrl == BULLET_ACTIVE) {
				if ((enemyBulletX < playerX + 40) && (enemyBulletX > playerX) && (enemyBulletY > playerY) && (enemyBulletY < playerY + 40)) {
					scene = SCENE_LOSE;
				}
			}			
			
			//Making sure this won't happen :P
			if (playerX >= 240) {
				scene = SCENE_LOSE;
			}
		} else if (scene == SCENE_WIN) {	//Win Scene
			Print(win, 130, 30);
			Print(pressStart, 120, 40);
			Draw(imgWin, 126, 55);
		} else {	//Lose Scene
			Print(lose, 130, 30);
			Print(pressStart, 120, 40);
			Draw(imgLose, 126, 55);
		}
	
		//Reset variables and restart game
		if ((scene == SCENE_WIN) || (scene == SCENE_LOSE)) {
			if (GetController1 & START) {
				playerX = 10; playerY = 190;
				playerGlide = GLIDE_NONE;
				playerBulletCtrl = BULLET_INACTIVE;
	
				enemyY = 190;
				enemyGlide = GLIDE_UP;
				enemyBulletCtrl = BULLET_INACTIVE;
				enemyLife = 5;
				
				scene = SCENE_PLAY;
			}
		}		
		
		WaitScreenRefresh;
	}
}

__________________
My Programming Projects: www.pradsprojects.com

[refraction]

nice one prads! that looks nice and easy to use!
A little less painful than assembly thats for sure ;p

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My Chip16 Emulator RefChip16 http://code.google.com/p/refchip16/

[paul_nicholls]

Looks good

[paul_nicholls]

I will hopefully get out my first chip16 demo in the next few days...
It should be quite reminiscent of the good old days (think Amiga) LOL

I have been wanting to get this demo done for a while now, but I had to figure out how to do a special sprite for it properly so some 'tricks' would work. I have now verified and created the sprite, I just have to write the code

[tykel]

@refraction: Thanks for the heads up on the bug, will check it out tomorrow I guess.
EDIT: Done.
@Prads: Well done, this is pretty significant, I can't wait to try it!

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---

Last edited by tykel; July 7th, 2012 at 15:41..

[paul_nicholls]

Hey guys,
I'm having trouble with getting a sprite to display correctly...

I have created a sprite which is 114 x 98 pixels (w x h) in size.
This equates to 57 bytes * 98 bytes (in chip16 format) = 5586 bytes in total.

I have tried code like this:

importbin boing_spr.bin 0 5586 ball_sprite

cBallSize equ $6239        ; 114 x 98 pixels sprite
cBallX    equ 104          ; starting x-location of ball
cBallY    equ 62           ; starting y-location of ball

;----------------------------------------------------------------
; R0 = ball x
; R1 = ball y
;----------------------------------------------------------------
main:
  ; setup sprite
  spr cBallSize
  ldi R0, cBallX
  ldi R1, cBallY
  call draw_ball
loop:
  jmp loop

draw_ball:
  drw R0, R1, ball_sprite
  ret

but the sprite is coming out all distorted:


Any ideas?

[tykel]

Originally Posted by paul_nicholls

Hey guys,
I'm having trouble with getting a sprite to display correctly...

I have created a sprite which is 114 x 98 pixels (w x h) in size.
This equates to 57 bytes * 98 bytes (in chip16 format) = 5586 bytes in total.

I have tried code like this:

importbin boing_spr.bin 0 5586 ball_sprite

cBallSize equ $6239        ; 114 x 98 pixels sprite
cBallX    equ 104          ; starting x-location of ball
cBallY    equ 62           ; starting y-location of ball

;----------------------------------------------------------------
; R0 = ball x
; R1 = ball y
;----------------------------------------------------------------
main:
  ; setup sprite
  spr cBallSize
  ldi R0, cBallX
  ldi R1, cBallY
  call draw_ball
loop:
  jmp loop

draw_ball:
  drw R0, R1, ball_sprite
  ret

but the sprite is coming out all distorted:


Any ideas?

Could you post the original pic for reference?
The drawing code in the rom is fine, so the problem seems to lie in your drawing code. If we can compare what it should look like to what it actually looks like, we should be able to guess what is up.

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mash16 (chip16 emulator) img16 (chip16 sprite converter)
______________________________________

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[refraction]

looks like youve got your height and width mixed up..

try doing SPR #7231

__________________

http://www.pcsx2.net
Intel i7 920 @ 3.4Ghz, POV GTX 570 1.3Gb, 1.8Tb HD space, 6Gb OCZ Reaper PC3-14400 Triple Channel
Dont PM me for help, use the forums, thats what its for!

My Chip16 Emulator RefChip16 http://code.google.com/p/refchip16/

[paul_nicholls]

Nevermind, it was a combination of the wrong value in the spr opcode, and I had screwed up my sprite creating code! LOL

It works now

---

Last edited by paul_nicholls; July 6th, 2012 at 23:16..

[paul_nicholls]

On this topic, I was wondering if the tchip16 assembler could be modified to accept extra spr input like this?

spr w,h

It would automatically halve the w value and form the 16-bit word behind the scenes.
So this:

spr 114,98

would become this:

spr $6239

[paul_nicholls]

Or maybe even better (handy in lots of other ways), expression support in the assembler

Then I could use this:

spr w + (h << 8)

[ShendoXT]

Paul, you are missing VBLNK in the sample above which may decrease framerate on some emulators.
Edit: Hm, ignore that. I thought you were drawing sprite more than once.

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---

Last edited by ShendoXT; July 7th, 2012 at 12:58..

[paul_nicholls]

Originally Posted by ShendoXT

Paul, you are missing VBLNK in the sample above which may decrease framerate on some emulators.

Thanks for noticing ShendoXT
That was just the bare-bones code anyway, the final thing has a VBLNK opcode in it

Speaking of my code, I need to find a way to move RGB triplets from one position in a palette in the ROM to an adjacent part of the palette...effectively rotating the colors left or right in the palette.

Unfortunately, I have looked at the store and load opcodes, and they all seem to deal with 16-bit values. This isn't going to do what I need since the 3 parts of a palette color don't fit evenly in one or two 16-bit words.

Any ideas?

[ShendoXT]

You could load 16 bit data and AND it with 0xFF to get a clean R, G and B values.
Then you just store that data somewhere in the memory in the RGB order.

If you want you can also have a 16 bit RG and B data.
You would get RG with load and B with load AND 0XFF.

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Don't PM or ask me about VMP-MCR conversions. I will ignore you if you do.

[tykel]

@Prads: I tried to compile a little test of mine and it compiled ok, but did not work. In the debugger I noticed the program started execution in the strings section of the ROM, rather than the code section (ie. PC was initially the first byte of 'Hello world!' :S)...

Code so you can reproduce:

ConstString strHello = "Hello world!"

void main() {
	ClearScreen;
	var ind;
	ind = 0;
	//while (ind < 10) {
		Print(strHello, 5, 10*ind);
		ind = ind + 1;
	//}
	while (1) {
		WaitScreenRefresh;
	}
}

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[paul_nicholls]

Originally Posted by ShendoXT

You could load 16 bit data and AND it with 0xFF to get a clean R, G and B values.
Then you just store that data somewhere in the memory in the RGB order.

If you want you can also have a 16 bit RG and B data.
You would get RG with load and B with load AND 0XFF.

I'm confused as to how that is going to help since all stores to memory will write a 16-bit value...

Unless you are suggesting I copy the RG part (16-bit) then the GB (16-bit) from one color to another? That could work I guess even though it would copy 1 byte twice.

[Prads]

Originally Posted by tykel

@Prads: I tried to compile a little test of mine and it compiled ok, but did not work. In the debugger I noticed the program started execution in the strings section of the ROM, rather than the code section (ie. PC was initially the first byte of 'Hello world!' :S)...

Code so you can reproduce:

ConstString strHello = "Hello world!"

void main() {
	ClearScreen;
	var ind;
	ind = 0;
	//while (ind < 10) {
		Print(strHello, 5, 10*ind);
		ind = ind + 1;
	//}
	while (1) {
		WaitScreenRefresh;
	}
}

You forgot the ";" at the end of ConstString declaration. Compiler should have caught that and give a meaningful error but it doesn't, at least not in this version.

But also the Print doesn't take variables or expression as coordinate. Only const and literals. But I can make it take variables and expression in next version.

Also feedbacks on what you want on next version would be helpful. I will try to add them.

P.S. If someone wants to join in the development, they are welcome.

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[paul_nicholls]

I've almost finished my first chip16 demo
I want to add in some sound, and hopefully (but not essential), gravity...

Stay tuned!!

[paul_nicholls]

Here is my chip16 demo, inspired by the Amiga



I have attached a zip file containing the source code & image binaries + .c16 file
Enjoy!

Attached Files

boing.zip (7.0 KB, 9 views)

[tykel]

@paul_nicholls: Wow. Great job mate, it looks brilliant.
It showcases exactly how to use palette cycling to great effect

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______________________________________

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