diff --git a/Atari/gr_basics.asm b/Atari/gr_basics.asm
index 5a75e8e..4aea4f4 100644
--- a/Atari/gr_basics.asm
+++ b/Atari/gr_basics.asm
@@ -109,6 +109,8 @@ EndOfUnPlot
 .proc plot  ;plot (xdraw, ydraw, color)
 ; color == 1 --> put pixel
 ; color == 0 --> erase pixel
+; xdraw (word) - X coordinate
+; ydraw (word) - Y coordinate
 ; this is one of the most important routines in the whole
 ; game. If you are going to speed up the game, start with
 ; plot - it is used by every single effect starting from explosions
@@ -165,9 +167,11 @@ ClearPlot
 .proc ExPlot  ;ExPlot (EplotX, EplotY)
 ; EOR plot:
 ; Inverts color of a pixel
+; EplotX (word) - X coordinate
+; EplotY (byte) - Y coordinate
 ; Note: No coordinate control!!!
 ;       With off-screen coordinates, it can damage main program.
-; only for ingame meteors
+; only for ingame meteors - for Atari only
 ; -----------------------------------------
     ; let's calculate coordinates from xdraw and ydraw
     ;xbyte = xbyte/8
@@ -195,8 +199,10 @@ ClearPlot
 ; -----------------------------------------
 .proc point_plot
 ; -----------------------------------------
-    ; checks state of the pixel (coordinates in xdraw and ydraw)
-    ; result is in A (zero or appropriate bit is set)
+; checks state of the pixel (coordinates in xdraw and ydraw)
+; xdraw (word) - X coordinate
+; ydraw (word) - Y coordinate
+; result is in A (zero or appropriate bit is set)
 
     ; let's calculate coordinates from xdraw and ydraw
 
@@ -227,6 +233,9 @@ ClearPlot
 ;--------------------------------------------------
 .proc drawmountains
 ;--------------------------------------------------
+; draw mountains from mountaintable
+; ClearSky - $ff Crear sky during drawmountains, 0 - no clear sky
+
     mwa #0 xdraw
     mwa #mountaintable modify   ; mountaintable pointer
     mva #1 color
@@ -424,7 +433,7 @@ NothingToFall
 ;--------------------------------------------------
 .proc SoilDownTurbo
 ;--------------------------------------------------
-; fast SoilDown froc - test
+; fast SoilDown proc
     jsr ClearTanks
 NoClearTanks
     jsr CalcAndDrawMountains
diff --git a/C64/gr_basics.asm b/C64/gr_basics.asm
index 831d814..7ce418c 100644
--- a/C64/gr_basics.asm
+++ b/C64/gr_basics.asm
@@ -101,6 +101,8 @@ EndOfUnPlot
 .proc plot  ;plot (xdraw, ydraw, color)
 ; color == 1 --> put pixel
 ; color == 0 --> erase pixel
+; xdraw (word) - X coordinate
+; ydraw (word) - Y coordinate
 ; this is one of the most important routines in the whole
 ; game. If you are going to speed up the game, start with
 ; plot - it is used by every single effect starting from explosions
@@ -154,8 +156,10 @@ ClearPlot
 ; -----------------------------------------
 .proc point_plot
 ; -----------------------------------------
-    ; checks state of the pixel (coordinates in xdraw and ydraw)
-    ; result is in A (zero or appropriate bit is set)
+; checks state of the pixel (coordinates in xdraw and ydraw)
+; xdraw (word) - X coordinate
+; ydraw (word) - Y coordinate
+; result is in A (zero or appropriate bit is set)
 
     ; let's calculate coordinates from xdraw and ydraw
 
@@ -185,6 +189,7 @@ ClearPlot
 ;--------------------------------------------------
 .proc drawmountains
 ;--------------------------------------------------
+; draw mountains from mountaintable
     mwa #0 xdraw
     mwa #mountaintable modify
     mva #1 color
@@ -305,10 +310,10 @@ NoMountain
 ;--------------------------------------------------
 .proc SoilDownTurbo
 ;--------------------------------------------------
-; fast SoilDown froc - test
+; fast SoilDown proc
     jsr ClearTanks
 NoClearTanks
-;    jsr CalcAndDrawMountains
+;    jsr CalcAndDrawMountains - to do  (now Atari only)
     jmp DrawTanks
     ;rts
 .endp
diff --git a/scorch.asm b/scorch.asm
index e760d74..858b940 100644
--- a/scorch.asm
+++ b/scorch.asm
@@ -15,6 +15,8 @@
     .def TARGET = 800 ; 5200
 .ENDIF
 ;---------------------------------------------------
+.def SPLASH = 0
+; if 0 - no splash screens
 .def CART_VERSION = 0
 ; if 1 - dual splash screen
 .def METEORS = 1
@@ -186,10 +188,22 @@ FirstZpageVariable = $50
     .IF TARGET = 800
       icl 'Atari/lib/ATARISYS.ASM'
       icl 'Atari/lib/MACRO.ASM'
+    .IF SPLASH = 1
       icl 'artwork/splash_v2/splash.asm'  ; new splash screen and musix
-    .IF CART_VERSION
+    .IF CART_VERSION = 1
       icl 'artwork/splash_v1/splash.asm'  ; old splash screen (plays music from new splash)
     .ENDIF
+    .ELSE
+      ; no splash.... dark screean and BASIC off
+      ORG $2000
+      mva #0 dmactls             ; dark screen
+      mva #$ff portb
+      ; and wait one frame :)
+      seq:wait                   ; or waitRTC ?
+      mva #$ff portb        ; BASIC off
+      rts
+      ini $2000
+    .ENDIF
 ;      icl 'Atari/Manual/manual.asm'     ; manuals display
     .ELIF TARGET = 5200
       OPT h-f+  ; no headers, single block --> cart bin file
diff --git a/scorch.xex b/scorch.xex
index 8b87228..bc90e94 100644
Binary files a/scorch.xex and b/scorch.xex differ