latest updates

Makefile

@@ -14,5 +14,5 @@ clean:
 ###############################################################################
 # Rule to run the final cartridge .nes file in the FCEUX emulator
 ###############################################################################
-run:
+run: build
 	fceux clearmem.nes

atlantico/atlantico.asm

@@ -240,7 +240,6 @@ DoneIncrementing:
 			jmp LoadPaletteBytes
 		:
 
-
 LoadPaletteBytes:	
     PPU_SETADDR $3F00
     ldy #0                   ; Y = 0
@@ -810,29 +809,41 @@ FinishCollisionCheck:
     rts
 .endproc
 
-.proc LoadTitleScreen
+
-		lda #<TitleScreenData
+.proc LoadTitleScreenRLE ; uses RLE
-		sta BgPtr
 	lda #>TitleScreenData
 	sta BgPtr+1
+	lda #<TitleScreenData
+	sta BgPtr+0
 
 	PPU_SETADDR $2000
-		ldx #$00
-		ldy #$00
-	OuterLoop:
-	InnerLoop:
-	  lda (BgPtr),y
-		sta PPU_DATA
-		iny
-		cpy #0
-		beq IncreaseHiByte
-		jmp InnerLoop
-	IncreaseHiByte:
-	  inc BgPtr+1
-		inx
-		cpx #4
-		bne OuterLoop
 
+	ldy #0
+
+	LengthLoop:
+		lda (BgPtr),y
+		beq EndRoutine
+		iny
+
+		bne :+
+			inc BgPtr+1
+		:
+
+		tax
+		lda (BgPtr),y
+		iny
+
+		bne :+
+			inc BgPtr+1
+		:
+
+		TileLoop:
+			sta PPU_DATA
+			dex
+			bne TileLoop
+		jmp LengthLoop
+
+  EndRoutine:
 	  rts
 .endproc
 
@@ -874,7 +885,7 @@ Reset:
 		sta MenuItem
 
 		jsr LoadPalette
-		jsr LoadTitleScreen                   ; Load tiles and attributes to the PPU
+		jsr LoadTitleScreenRLE                   ; Load tiles and attributes to the PPU
 
 		lda #0
 		sta MenuItem
@@ -1451,7 +1462,7 @@ AttributeData:
 
 
 TitleScreenData:
-.incbin "titlescreen.nam"
+.incbin "titlescreen.rle"
 
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

atlantico/rle.py

@@ -0,0 +1,70 @@
+###############################################################################
+# RLE encoder
+###############################################################################
+# Takes any binary file and converts to RLE sequenced (ended with length 0)
+# Input:  FF FF FF FF FF FF FF FF FF 0A FF FF FF
+# Output: 09 FF 01 0A 03 FF 00
+###############################################################################
+import os
+import sys
+import math
+
+input = sys.argv[1]
+
+if len(sys.argv) == 1:
+  print("Usage:\n $ python3 ./rle.py <BIN_FILENAME>\n\nOutput .rle format.")
+  sys.exit()
+
+def compress(data):
+  output = []
+  i = 1
+  total = 0
+  char = data[0]
+  count = 1
+
+  while i <= len(data):
+    if i == len(data):
+      output.append(bytes([count]))
+      output.append(bytes([char]))
+      total += count
+      break
+    if char == data[i]:
+      count += 1
+      if count == 255:
+        total += count
+        output.append(bytes([count]))
+        output.append(bytes([char]))
+        count = 0
+      i += 1
+      continue 
+    else:
+      total += count
+      output.append(bytes([count]))
+      output.append(bytes([char]))
+      count = 1
+      char = data[i] 
+      i += 1
+      continue 
+    
+  print(total, "bytes compresed to", len(output))
+  return output
+
+def read_file_bytes(file):
+  with open(file, 'rb') as f:
+    return f.read()
+
+def read_file(input):
+    inbytes = read_file_bytes(input)
+    output = compress(inbytes)
+    f = None 
+    try: 
+      f = open(input.split('.')[0]+".rle", "wb")
+      for b in output:
+        f.write(b)
+      f.write(b'\x00')
+    finally:
+      f.close()
+
+read_file(input)
+
+print("File written successfully.")