Game of Life running in LORES!
This commit is contained in:
Christophe Meneboeuf
parent
1f97d75428
commit
3e796dfe38
41
gfx.asm
41
gfx.asm
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@ -3,6 +3,8 @@
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.import pusha
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.import popa
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.import pushax
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.import popax
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.export _mode_text
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.export _gfx_init
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@ -103,8 +105,9 @@ init_end:
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;void __fastcall__ gfx_fill( uint8_t color )
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; Fills the screen with the given color
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_gfx_fill:
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; TODO SWITCH PAGES !!
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; TODO SWITCH PAGES !!
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;saving the context
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;WARNING context us not saved properly: ptr+1 not saved!
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TAX
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LDA tmp1
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JSR pusha
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@ -176,28 +179,32 @@ fill_end:
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;void __fastcall__ gfx_pixel( uint8_t color, uint8_t coord_x, uint8_t coord_y )
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; Draws a pixel at the given coordinates on the Page_Future
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_gfx_pixel:
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;aliases
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coord_y := tmp3
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;saving the context
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TAX
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PHA
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LDA tmp3
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JSR pusha
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LDA tmp2
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JSR pusha
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;LDA tmp1
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;JSR pusha
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LDA tmp1
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JSR pusha
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LDA ptr1
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JSR pusha
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LDX ptr1+1
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JSR pushax
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LDA ptr2
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JSR pusha
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TXA
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LDX ptr2+1
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JSR pushax
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PLA
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STA tmp3 ;coord_y
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STA coord_y ;coord_y
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; Modify the color depending on the pixel's line parity
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AND #1
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BEQ even
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odd: ; pixel is on an odd line
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LDA #$0F ;To or with the other nybble when writting the pixel
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STA tmp1
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LDY #(1+4) ;there were 4 pushes to save registers
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LDY #(1+7) ;there were 7 pushes to save registers
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LDA (sp),Y ;color
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ASL ;shift the color to put it on high nybble
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ASL
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@ -208,7 +215,7 @@ odd: ; pixel is on an odd line
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even: ; pixel is on an even line
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LDA #$F0 ;To or with the other nybble when writting the pixel
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STA tmp1
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LDY #(1+4) ;there were 4 pushes to save registers
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LDY #(1+7) ;there were 7 pushes to save registers
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LDA (sp),Y ;color
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oddeven:
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STA tmp2
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@ -222,7 +229,7 @@ oddeven:
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STA ptr1+1
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; get the line adress and store it in ptr2
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LDA tmp3
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LDA coord_y
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LSR
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ASL
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TAY
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@ -233,7 +240,7 @@ oddeven:
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STA ptr2+1
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; get coord_x
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LDY #4 ;there were 4 pushes to save registers
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LDY #7 ;there were 4 pushes to save registers
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LDA (sp),Y
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; draw
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TAY
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@ -243,12 +250,14 @@ oddeven:
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STA (ptr2),Y
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;restoring the context
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JSR popa
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JSR popax
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STA ptr2
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JSR popa
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STX ptr2+1
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JSR popax
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STA ptr1
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;JSR popa
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;STA tmp1
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STX ptr1+1
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JSR popa
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STA tmp1
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JSR popa
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STA tmp2
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JSR popa
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11
gol_apple2.c
11
gol_apple2.c
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@ -22,7 +22,7 @@ void toggle_cell( const uint8_t x, const uint8_t y ); /* toggles the cell at the
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void run( void ); /* runs the simulation */
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void __fastcall__ update( void ); /* updates the simulation */
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void __fastcall__ update_asm( void ); /* updates the simulation */
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void __fastcall__ update_wip( void ); /* updates the simulation */
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uint8_t __fastcall__ count_neighbours( uint8_t* cell ); /* counts nb neighbours of the cell */
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@ -231,16 +231,17 @@ void toggle_cell( const uint8_t x, const uint8_t y )
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void run( void )
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{
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#define PRINTF_LINE 21u
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char str_nb_iteration [5];
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uint16_t nb_iterations = 2u;
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KeyPressed = NO_KEY;
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gotoxy( 0u, 23 );
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printf("Iteration:1 (R)eset (E)ditor (Q)uit");
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gotoxy( 0u, PRINTF_LINE );
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printf("Iteration:1\n\n(R)eset (E)ditor (Q)uit");
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while( KeyPressed == NO_KEY)
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{
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/* Evolving the cells */
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update( );
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gotoxy(10u, 23);
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update_wip( );
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gotoxy(10u, PRINTF_LINE);
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printf( itoa(nb_iterations++, str_nb_iteration, 10) );
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/* Testing key pressed */
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if( kbhit() ) {
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@ -2,18 +2,26 @@
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.include "apple2.inc"
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.include "zeropage.inc"
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.import _memcpy
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.import popa
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.import popax
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.import pusha
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.import pushax
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.import _gfx_pixel
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.import _get_color
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.export _init_asm
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.export _count_neighbours
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.export _update_wip
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.define NB_LINES 40
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.define NB_COLUMNS 40
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.define JUMP_BEGINNING_NEXT_LINE NB_LINES - 2
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.define ALIVE 1
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.define DEAD 0
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.define BLACK 0
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.define CELLS_SIZE 1600
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; ******************
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@ -42,22 +50,22 @@ cell := ptr4
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ADC (cell),Y
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;next row
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STA tmp1
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STA tmp4
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TYA
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ADC #JUMP_BEGINNING_NEXT_LINE
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TAY
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LDA tmp1
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LDA tmp4
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ADC (cell),Y
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INY
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INY
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ADC (cell),Y
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;next row
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STA tmp1
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STA tmp4
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TYA
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ADC #JUMP_BEGINNING_NEXT_LINE
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TAY
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LDA tmp1
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LDA tmp4
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ADC (cell),Y
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INY
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ADC (cell),Y
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@ -139,6 +147,17 @@ _update_wip:
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cell_curr := ptr1
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cell_neighbourhoud_line := ptr2
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cell_future_line := ptr3
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nb_neighbours := tmp1
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LDA ptr1
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LDX ptr1+1
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JSR pushax
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LDA ptr2
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LDX ptr2+1
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JSR pushax
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LDA ptr3
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LDX ptr3+1
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JSR pushax
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;preambule
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; cell_neighbourhoud = Cells
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@ -147,27 +166,121 @@ cell_future_line := ptr3
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add_16 cell_line, cell_neighbourhoud, #NB_LINES+1, #0
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; cell_future = Cells_Future + NB_LINES + 1u
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add_16 cell_future, Cells_Future, #NB_LINES+1, #0
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; loop : for( y = 1u; y < NB_LINES - 1u; ++y )
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LDY #1
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loop_y:
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CPY #NB_LINES-1
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BEQ end_y
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;those macros don't touch Y
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copy_16 cell_curr, cell_line
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copy_16 cell_neighbourhoud_line, cell_neighbourhoud
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copy_16 cell_future_line, cell_future
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;PAS BESOIN DE CES POINTEURS: ADRESSE DE BASE + X ???
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STY tmp3
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CPY #NB_LINES-1
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BEQ end_y
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; loop : for( x = 1u; x < NB_COLUMNS - 1u; ++x )
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LDX #1
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loop_x:
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CPX #NB_LINES-1
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BEQ end_x
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CPX #NB_COLUMNS-1
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BEQ end_x
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;TODO
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; uint8_t nb_neighbours = count_neighbours( cell_neighbourhoud_line )
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STX tmp2
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LDA cell_neighbourhoud_line
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LDX cell_neighbourhoud_line+1
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JSR _count_neighbours ; nb_neighbours in A
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STA nb_neighbours
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JMP tst_alive
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next_x:
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add_16 cell_curr, cell_curr, #NB_LINES, #0
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add_16 cell_neighbourhoud_line, cell_neighbourhoud_line, #NB_LINES, #0
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add_16 cell_future_line, cell_future_line, #NB_LINES, #0
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; next X
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LDX tmp2
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INX
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CLC
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BCC loop_x
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JMP loop_x
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end_x:
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add_16 cell_line, cell_line, #1, #0
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add_16 cell_neighbourhoud, cell_neighbourhoud, #1, #0
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add_16 cell_future, cell_future, #1, #0
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; next Y
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LDY tmp3
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INY
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CLC
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BCC loop_y
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JMP loop_y
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end_y:
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JMP end_update ; This jump allows conditional branching
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; tst_dead section in the following (optimization)
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; *** TIP */
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; those should be placed inside loop_x (search for JMP tst_alive)
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; they are placed here not to overflow the 8 bit range of conditional branching
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tst_dead:
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LDY #0
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LDA (cell_curr),Y
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CMP #DEAD
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BNE next_x
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LDA nb_neighbours
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CMP #3
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BNE next_x
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; a cell is born
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LDA #ALIVE
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STA (cell_future_line),Y
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JSR _get_color ;random color in A
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JSR pusha
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LDA tmp2
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JSR pusha
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LDA tmp3
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JSR _gfx_pixel
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JMP next_x
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tst_alive:
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LDY #0
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LDA (cell_curr),Y
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CMP #ALIVE
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BNE tst_dead
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LDA nb_neighbours
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CLC
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ADC #$FE
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BCC kill_cell ; if nb_neighbours < 2
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LDA nb_neighbours
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CLC
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ADC #$FC ; no need to CLC again as prev tst failed
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BCC tst_dead ; if nb_neighbours <= 3
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kill_cell:
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LDA #DEAD
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STA (cell_future_line),Y
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JSR pusha ; #DEAD == #BLACK COLOR
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LDA tmp2
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JSR pusha
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LDA tmp3
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JSR _gfx_pixel
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JMP next_x
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end_update:
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; Cells_Future -> Cells
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LDA Cells
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LDX Cells+1
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JSR pushax
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LDA Cells_Future
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LDX Cells_Future+1
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JSR pushax
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LDA #<CELLS_SIZE
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LDX #>CELLS_SIZE
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JSR _memcpy
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JSR popax
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STA ptr3
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STX ptr3+1
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JSR popax
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STA ptr2
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STX ptr2+1
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JSR popax
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STA ptr1
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STX ptr1+1
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RTS
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;*************** END OF UPDATE **************
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