angle 0 elliminated

README.md

@@ -55,15 +55,15 @@ With the advent of [fujinet](https://fujinet.online/) we are thinking about maki
 2022-11-07
 
 Possibly the final single-player version of the game, unless our dear players find another breaking issue!
-* 5200 keypad works as it should. You can now press these finicky foils to your hearth's desire.
+* 5200 keypad works as it should. You can now press these finicky foils to your heart's desire.
 * "Unknown" type Robotanks were attacking with Nuclear Winter every time. Fixed!
-* One of variables was declared as a byte but used as a word which might cause some rare instabilities.
+* One of the variables was declared as a byte but used as a word that might cause some rare instabilities.
 * Page zero variables are cleared prior to the game start to eliminate rare issues in some software/hardware configurations.
 * The new version of music in NTSC eliminates issues with tempo (not that anyone but the artist noticed that, but still it is an improvement!)
 * You can now wrap around inventory and shop to faster access these options far down below.
 * Visual improvement of the main menu and fixed some color issues with the title headers.
 * Hovercraft was always flying to the top of the screen, it was not intended, it is now hovering just above the mountains!
-* The main menu does not blink now when changing options. This was a very minor thing but it bothered me to some extend. Fixing it required a complete rewrite of this portion of the menu.
+* The main menu does not blink now when changing options. This was a very minor thing but it bothered me to some extent. Fixing it required a complete rewrite of this portion of the menu.
 
 
 ###### Version 1.17

grafproc.asm

@@ -2109,10 +2109,23 @@ YangleUnder90
     sta vy
 
     lda #0  ; all arithmetic to zero
-    sta vx+1
-    sta vy+1
     sta fx
     sta fy
+    sta vx+1
+    sta vy+1
+
+    ;; add 0.5 to vx and vy for better rounding
+    ;clc
+    ;lda vx
+    ;adc #128  ; 1/2
+    ;sta vx
+    ;scc:inc vx+1
+    ;
+    ;clc
+    ;lda vy
+    ;adc #128  ; 1/2
+    ;sta vy
+    ;scc:inc vy+1
     
     ; draw by vx vy
     ; in each step 
@@ -2124,42 +2137,43 @@ YangleUnder90
 barrelLoop
     
     lda goleft
-    bne @+
+    bne goright
     clc
     lda fx
     adc vx
     sta fx
+    bcc @+
     lda xdraw
-    adc #0
+    adc vx+1
     sta xdraw
-    lda xdraw+1
-    adc #0
-    sta xdraw+1
-    jmp ybarrel
+    bcc @+
+    inc xdraw+1
 @
+    jmp ybarrel
+goright
     sec
     lda fx
     sbc vx
     sta fx
+    bcs @+
     lda xdraw
-    sbc #0
+    sbc vx+1
     sta xdraw
-    lda xdraw+1
-    sbc #0
-    sta xdraw+1
-
+    bne @+
+    dec xdraw+1
+@
 ybarrel
     sec
     lda fy
     sbc vy
     sta fy
+    bcs @+
     lda ydraw
-    sbc #0
+    sbc vy+1
     sta ydraw
-    lda ydraw+1
-    sbc #0
-    sta ydraw+1
-    
+    bcs @+
+    dec ydraw+1
+@    
     jsr plot ;.MakePlot
 
     dec yc

weapons.asm

@@ -1305,9 +1305,8 @@ pressedRight
     mva #sfx_set_power_2 sfx_effect
 	mva #1 Erase
 	jsr DrawTankNr.BarrelChange
-    dec AngleTable,x
-    lda AngleTable,x
-    cmp #255 ; -1
+    dec:lda AngleTable,x
+    cmp #0 
     jne BeforeFire
     lda #179
     sta AngleTable,x