Add PicoCalc SD folder for factory SD card files

Author: cuu

Bin/PicoCalc SD/PicoCalc SD/Chessnovice_johnybot.nes

@@ -0,0 +1,24 @@
+'Bifurcation diagram of the logistic map
+Const W = 320
+Const H = 320
+
+Const R_MIN = 2.5
+Const R_MAX = 4.0
+Const ITER = 200
+Const LAST_ITER = 50
+
+Dim x As FLOAT
+Dim r As FLOAT
+
+Color RGB(128, 128, 128)
+
+For i = 0 To W
+  r = R_MIN + (R_MAX - R_MIN) * i / W
+  x = 0.5
+  For j = 1 To ITER
+    x = r * x * (1 - x)
+    If j > (ITER - LAST_ITER) Then
+      Pixel H - Int(x * H), i
+    End If
+  Next j
+Next i