Tetris

// This program is Tetris game in assembly code;
// I use stack to store the sistuation of bit(方塊);
// Like : rectangular 
//  *    **    **    **	  **	  **
//  *     **  **     * 	   *	  **
//  *			     * 	   *
//  *
//  _0-3 _4-7  _8-11 _12-15 _16-19 _20-23

// Set two Matrix, both are 8*8 Matrix.
// One is 表面, another is 背景.
// ******** ........,63
// ********
// ********
// ********
// ********
// ********
// ********
// ********  0,1,2,3....

// We use R0 & stack to store "方塊中心點"
// R1 存取 ROM 的位置，用在改變位置(下移、左右移動)

ORG 00h
interrupt 0  // reset
interrupt 1  // In stady time, down the block.

loop{

Random:	
	// Random bit
	//Some body have code.
	push 1  // Record the index of block.

Up
	// Check input_up have a value. Yes, check there have some spcae to turn block. No, next stage.
	
	mov a, pin1
	jz a, right
	JBC a,Check_up_space  // If push button was pushed, check space.
	
Check_up_space:
	//pop index from stack...
	pop a // This register store what's row the block is ?
	pop b // This register store what's column the block is ?
	pop 1.0 // This register store what's type of block is ?
	
	//Block1 is rectangular. Have 4 type.

_0:	
	// Set a matrix to repreant a block.
	// Original 58H=1,59H=1,60H=1,61H=1
	// 初始中心點在59H
	pop R0
	R0


	// Use loop to do a AND-logic judgement with 

	// Check input_right...

	// Check input_left...

	// Show screen.
	// Print data by rows. From left to right.

	// Block auto down && Test there have some space to put block

BlockDown:
	// Move THE POINT to next row.
	INC R0
	INC R0
	INC R0
	INC R0
	INC R0
	INC R0
	INC R0
	INC R0

DownTest:
	// Use loop to do a AND-logic judgement with 
	// R0 store the value of potion of ROM.
	Mov A,R0
	
	
	AND A,(The point of Next row )
	JB A,stop

Stop:
	//Show Screen

CalculateScore:	
	// Check any row is light ? Yes, the row is clear and move other //block. Push score to 7-segment LED. No, keep working.
	

	// Check game over ?
	// Check 50H, 51H are light? Yes, game finished. No, LJMP Rand_Block
}