Finalize chip8 and init fix graphics

src/chip8.v

@@ -39,35 +39,32 @@ struct Chip8{
 		v [num_of_registers]u8
 		screen Screen
 		pc u16 = 0x200
-		i  int
+		i  u16
 		stack Stack
 		delay_timer u8
+		is_draw     bool
 }
 
 fn (mut chip Chip8) start_cpu(){
 
 	chip.screen = Screen{}
 
-	mut index := 0
 	// load font in the memory
 	for sprite in font {
-		chip.set_ram(sprite, index)
+		chip.set_ram(sprite, chip.i)
 	}
 }
 
 fn (mut chip Chip8) run(){	
-	
-	for{
 	mut instruction := chip.fetch()
-		println(instruction)
 	chip.decode_and_run(instruction)
-	}
 }
 
 
-fn (mut chip Chip8) set_ram(instructions []u8, index int) {
+fn (mut chip Chip8) set_ram(instructions []u8, index u16) {
 	
 	mut j := index
+
 	for i := 0; i < instructions.len; i++ {
 		chip.ram[j] = instructions[i]
 		j++
@@ -96,6 +93,7 @@ fn (mut chip Chip8) decode_and_run(instruction u16) {
 	mut opcode_msb := instruction & 0xF000
 	mut opcode_lsb := instruction & 0x00FF
 	mut is_jump := false
+	chip.is_draw = false
 
 	match opcode_msb{
 
@@ -108,7 +106,7 @@ fn (mut chip Chip8) decode_and_run(instruction u16) {
 				}
 
 				0x00E0 {
-					
+					chip.is_draw = true
 					for i := 0; i < chip.screen.display_height; i++{
 						for j := 0; j < chip.screen.display_width; j++ {
 							chip.screen.display[i][j] = 0
@@ -125,7 +123,7 @@ fn (mut chip Chip8) decode_and_run(instruction u16) {
 
 		0x1000 {
 			nnn = instruction & 0x0FFF
-			chip.pc = u8(nnn)
+			chip.pc = u16(nnn)
 			is_jump = true
 			// Jumps to address NNN
 		}
@@ -278,7 +276,7 @@ fn (mut chip Chip8) decode_and_run(instruction u16) {
 		0xA000 {
 			nnn = instruction & 0x0FFF
 
-			chip.i = nnn
+			chip.i = u16(nnn)
 		}
 
 		0xB000 {
@@ -298,37 +296,32 @@ fn (mut chip Chip8) decode_and_run(instruction u16) {
 		}
 
 		0xD000 {
+
+			chip.is_draw = true
 			x = (instruction & 0x0F00) >> 8
 			y = (instruction & 0x00F0) >> 4
 			n = (instruction & 0x000F)
 
-			mut regvy := u8(chip.v[y] % chip.screen.display_height)
+			mut regvy := u16(chip.v[y])
-			mut regvx := u8(chip.v[x] % chip.screen.display_width)
+			mut regvx := u16(chip.v[x])
 
 			chip.v[f] = 0
 
 			for y_coord := 0; y_coord < n; y_coord++ {
 				
-				
+				pixel := chip.ram[chip.i + y_coord]
-				regn := chip.ram[chip.i + y_coord]
 				
 				for x_coord := 0; x_coord < 8; x_coord++ {
 					
-					if (regvx + x_coord) < chip.screen.display_width && (regvy + y_coord) < chip.screen.display_height {
+					if pixel & (0x80 >> x_coord) == 1 {
-				
+						if chip.screen.display[regvy + y_coord][regvx + x_coord] == 1 {
-						if regn & (0x80 >> x_coord) == 1 && chip.screen.display[regvy + y_coord][regvx + x_coord] == 1 {
 							chip.v[f] = 1
-							chip.screen.display[regvy + y_coord][regvx + x_coord] = 0
+							//chip.screen.display[regvy + y_coord][regvx + x_coord] = 0
 						}
 						
-
+						chip.screen.display[regvy + y_coord][regvx + x_coord] ^= 1
-						chip.screen.display[regvy + y_coord][regvx + x_coord] = chip.ram[chip.i + y_coord]
-
-						regvx = u8(chip.v[x + x_coord] % chip.screen.display_width)
 					}
 				}
-				
-				regvy = u8(chip.v[y + y_coord] % chip.screen.display_height)
 			}
 		}
 

src/main.v

@@ -13,7 +13,7 @@ struct Emulator{
 }
 
 fn (mut emulator Emulator) draw_block(i f32, j f32) {
-	emulator.graphic.draw_rect_filled(f32((j - 1) * 20) + 14, f32((i - 1) * 20), f32(20 - 1), f32(20 - 1), gx.rgb(255,255,255))
+	emulator.graphic.draw_rect_filled(j,i, f32(20-1), f32(20-1), gx.rgb(0,255,0))
 }
 
 fn (mut emulator Emulator) load_rom() !{
@@ -28,8 +28,8 @@ fn (mut emulator Emulator) load_rom() !{
 		println(' Loading ROM in the memory...\n')
 		load_animate()
 		
-		mut instructions := file.read_bytes_at(1024, 0)
+		mut instructions := file.read_bytes(1024)
-		mut index := 0x200
+		mut index := u16(0x200)
 		emulator.chip8.set_ram(instructions, index)
 
 		println('ROM successfully loaded into memory!')
@@ -50,7 +50,7 @@ fn draw_screen(mut emulator Emulator){
 			pixel := emulator.chip8.screen.display[y][x]
 			
 			if pixel == 1 {
-				emulator.draw_block(f32(y*10), f32(x*10))
+				emulator.draw_block(f32((y-1)*20), f32((x-1)*20))
 			}
 		}
 	}
@@ -152,8 +152,7 @@ fn main() {
 
 		emulator.load_rom()!
 		emulator.chip8.start_cpu()
-		emulator.chip8.run()
+
-		print('oi')
 		emulator.graphic = gg.new_context(
 									bg_color: gx.rgb(0, 0, 0)
 									width: 1280
@@ -162,7 +161,21 @@ fn main() {
 									frame_fn : draw_screen
 									user_data: emulator
 								)
-		//emulator.show_display()
+
+		
+
+		for{
+			emulator.chip8.run()
+
+			emulator.graphic.quit()
+			if emulator.chip8.is_draw {
+				emulator.graphic.begin()
+				emulator.show_display()
+				emulator.graphic.end()
+				
+			}
+		}
+
 	}else{
 		panic('System is not graphic!')
 	}

src/utils.v

@@ -33,7 +33,7 @@ fn load_animate() {
 
     mut bars := ['|','/','-','\\']
     
-    for i := 0; i < 2000; i++ {
+    for i := 0; i < 4000; i++ {
             print('[${bars[i%4]}]\r ')
             time.sleep(400000)
     }