diff --git a/grafproc.asm b/grafproc.asm
index 70f2ca1..cb9db73 100644
--- a/grafproc.asm
+++ b/grafproc.asm
@@ -5,6 +5,8 @@
 
 ;--------------------------------------------------
 .proc draw ;;fuxxing good draw :) 
+; xdraw,ydraw (word) - coordinates of first point
+; xbyte,ybyte (word) - coordinates of last point
 ;--------------------------------------------------
 ;creditz to Dr Jankowski / MIM U.W.
 ; (xi,yi)-----(xk,yk)
@@ -291,6 +293,8 @@ EndOfDraw
 
 ;--------------------------------------------------
 .proc circle ;fxxxing good circle drawing :) 
+; xdraw,ydraw (word) - coordinates of circle center
+; radius (byte) - radius of circle 
 ;--------------------------------------------------
 ;Turbo Basic source
 ; R=30
diff --git a/scorch.bin b/scorch.bin
index b17ab08..ffb3aa9 100644
Binary files a/scorch.bin and b/scorch.bin differ
diff --git a/scorch.xex b/scorch.xex
index 2ba2279..31575f8 100644
Binary files a/scorch.xex and b/scorch.xex differ
diff --git a/weapons.asm b/weapons.asm
index a90f1b0..7de25a9 100644
--- a/weapons.asm
+++ b/weapons.asm
@@ -3,6 +3,9 @@
     .IF *>0 ;this is a trick that prevents compiling this file alone
 ;--------------------------------------------------
 .proc Explosion
+; xdraw,ydraw (word) - coordinates of explosion center
+; TankNr - number of shooting tank
+; ActiveWeapon(TankNr) - weapon that tank fires
 ;--------------------------------------------------
     ;cleanup of the soil fall down ranges (left and right)
 	jsr ClearScreenSoilRange
@@ -358,29 +361,34 @@ EndNurnedCheckLoop
 ; ------------------------
 .proc babyroller
     mva #11 ExplosionRadius
+GoRoller
     jmp xroller
 .endp
 ; ------------------------
 .proc roller ;
     mva #21 ExplosionRadius
-    jmp xroller
+	bne babyroller.GoRoller	; 1 byte saved
+;    jmp xroller
 .endp
 ; ------------------------
 .proc heavyroller
     mva #30 ExplosionRadius
-    jmp xroller
+	bne babyroller.GoRoller	; 1 byte saved
+;    jmp xroller
 .endp
 ; ------------------------
 .proc riotbomb
     mva #17 ExplosionRadius
+GoRiotBomb
     jsr CalculateExplosionRange
     jmp xriotbomb
 .endp
 ; ------------------------
 .proc heavyriotbomb
     mva #29 ExplosionRadius
-    jsr CalculateExplosionRange
-    jmp xriotbomb
+	bne riotbomb.GoRiotBomb ; 4 bytes saved - optimization :)
+;    jsr CalculateExplosionRange
+;    jmp xriotbomb
 .endp
 ; ------------------------
 .proc babydigger
@@ -932,6 +940,14 @@ ExplodeNow
 ; --------------------------------------------------
 .proc checkRollDirection
 ; check rolling direction (for roller and other rolling weapons)
+; xdraw (word) - X coordinate
+; Y coordinate is taken from mountaintable and go to ydraw (word)
+; shoot direction is taken from VX+3
+; result:
+; HowMuchToFall - direction
+; $FF - we are in a hole (flying in missile direction)
+; 1 - right, 2 - left
+; --------------------------------------------------
     ldy #0
     adw xdraw #mountaintable tempXROLLER
     lda (tempXROLLER),y
@@ -951,15 +967,12 @@ PositiveVelocity
     ; 1 - right, 2 - left
     mva #$ff HowMuchToFall
     mva ydraw HeightRol
-    ;mwa #mountaintable tempXROLLER - It's already done  !!!
-    ;adw tempXROLLER xdraw
 SeekLeft
 	cpw tempXROLLER #mountaintable
     beq GoRightNow		; "bounce" if we have on left end
 .nowarn    dew tempXROLLER
     lda (tempXROLLER),y    ;fukk! beware of Y value
     cmp HeightRol
-    ;bne HowMuchToFallLeft
 HowMuchToFallLeft
     bcs GoRightNow
 	mva #1 HowMuchToFall
@@ -971,9 +984,7 @@ SeekRight
     inw tempXROLLER
     lda (tempXROLLER),y
     cmp HeightRol
-    ;bne HowMuchToFallRight
 HowMuchToFallRight
-    ; check if up or down
     bcs HowMuchToFallKnown
     lda HowMuchToFall
     bpl ItIsLeftAlready