First attempt to 2 bytes Y

grafproc.asm

@@ -38,14 +38,10 @@ draw .proc ;;fuxxing good draw :)
     bcs DrawOutOfTheScreen
     cpw xbyte #screenwidth
     bcs DrawOutOfTheScreen
-    ;cpw ydraw #screenheight
-    ;bcs DrawOutOfTheScreen
-    ;cpw ybyte #screenheight
-    ;bcc DrawOnTheScreen
-    lda ydraw+1
-    bne DrawOutOfTheScreen
-    lda ybyte+1
-    beq DrawOnTheScreen
+    cpw ydraw #screenheight
+    bcs DrawOutOfTheScreen
+    cpw ybyte #screenheight
+    bcc DrawOnTheScreen
 DrawOutOfTheScreen
     ;jsr DrawJumpPad
     rts
@@ -225,7 +221,7 @@ PutPixelinDraw
 
 EndOfDraw
     mwa xtempDRAW xdraw
-    mva ytempDRAW ydraw
+    mwa ytempDRAW ydraw
     rts
 .endp
 
@@ -298,7 +294,7 @@ circle .proc ;fxxxing good circle drawing :)
 ; splot8
 
     mwa xdraw xcircle
-    mva ydraw ycircle
+    mwa ydraw ycircle
 
     mwa #0 xc
     mva radius yc
@@ -354,7 +350,7 @@ endcircleloop
     jsr splot8
 
     mwa xcircle xdraw
-    mva ycircle ydraw
+    mwa ycircle ydraw
     rts
 .endp
 ;----
@@ -379,14 +375,14 @@ splot8 .proc
     ;clc
     lda ycircle
     adc YC
-    sta ydraw
+    sta ydraw	; lower byte only !!!
     sta tempcir
     jsr plot
 
     sec
     lda ycircle
     sbc YC
-    sta ydraw
+    sta ydraw	; lower byte only !!!
     jsr plot
 
     sec
@@ -399,7 +395,7 @@ splot8 .proc
     jsr plot
 
     lda tempcir
-    sta ydraw
+    sta ydraw	; lower byte only !!!
     jsr plot
 ;---
     clc
@@ -412,14 +408,14 @@ splot8 .proc
     ;clc
     lda ycircle
     adc xC
-    sta ydraw
+    sta ydraw	; lower byte only !!!
     sta tempcir
     jsr plot
 
     sec
     lda ycircle
     sbc xC
-    sta ydraw
+    sta ydraw	; lower byte only !!!
     jsr plot
 
     sec
@@ -432,7 +428,7 @@ splot8 .proc
     jsr plot
 
     lda tempcir
-    sta ydraw
+    sta ydraw	; lower byte only !!!
     jsr plot
 
     RTS
@@ -549,7 +545,7 @@ CheckNextTank
     lda xtankstableH,x
     cmp xdraw+1
     bne UnequalTanks
-    lda ydraw
+    lda ydraw	; lower byte only !!!
     ;sec
     ;sbc #$01 ; minus 1, because it was 1 pixel too high
     sta ytankstable,x     ; what's the heck is that????!!!!
@@ -618,6 +614,7 @@ DrawTankNrX
     sta xdraw+1
     lda ytankstable,x
     sta ydraw
+	mva #0 ydraw+1
 
     jsr TypeChar
 
@@ -644,7 +641,7 @@ NoMissile
     sta xbyte+1
 
     ; calculate start position of the tank
-    lda ydraw
+    lda ydraw	; lower byte only !!!!
     clc
     adc #PMOffset
     sta temp
@@ -675,7 +672,11 @@ DoNotDrawTankNr
 drawmountains .proc
 ;--------------------------------------------------
 
-    mwa #0 xdraw
+	lda #0
+    sta xdraw
+    sta xdraw+1
+    sta ydraw	; not necessary but....
+    sta ydraw+1
     mwa #mountaintable modify
 	mva #1 color
 
@@ -696,7 +697,11 @@ NoMountain
 ;--------------------------------------------------
 drawmountainspixel
 ;--------------------------------------------------
-    mwa #0 xdraw
+	lda #0
+    sta xdraw
+    sta xdraw+1
+    sta ydraw	; not necessary but....
+    sta ydraw+1
     mwa #mountaintable modify
 
 
@@ -750,23 +755,23 @@ SoilDown2 .proc
     adw RangeLeft #mountaintable2 tempor2
 
 NextColumn1
-    mva #0 ydraw
+    mwa #0 ydraw
 NextPoint1
     jsr point
     beq StillNothing
     ldy #0
-    lda ydraw
+    lda ydraw	; lower byte only !!!
     sta (tempor2),y
     sta (temp),y
     jmp FoundPeek1
 StillNothing
-    inc ydraw
+    inc ydraw	; lower byte only !!!
     lda ydraw
     cmp #screenheight
 	bne NextPoint1
 	; no pixels on whole column !!!
 	ldy #0
-    lda ydraw
+    lda ydraw	; lower byte only !!!
     sta (tempor2),y
     sta (temp),y
     jmp FoundPeek1
@@ -803,7 +808,7 @@ FalloutOfLine
     adc #1
     sta (tempor2),y
     ; and checking if there is a pixel there
-    sta ydraw
+    sta ydraw	; lower byte only !!!
     jsr point
     bne ThereIsPixelHere
     ; if no pixel we plot it
@@ -814,7 +819,6 @@ FalloutOfLine
     ldy #0
     lda (temp),y
     sta ydraw
-    lda (temp),y
     clc
     adc #1
     sta (temp),y
@@ -854,7 +858,7 @@ getrandomY   ;getting random Y coordinate
     bcs getrandomY
     clc
     adc #(margin*2)
-    sta ydraw
+    sta ydraw	; lower byte only !!!
     sta yfloat+1
     mva #0 yfloat ;yfloat equals to e.g. 140.0
 
@@ -1014,7 +1018,7 @@ MakeUnPlot
     sta oldply,x
 
 
-    ldx ydraw
+    ldx ydraw	; lower byte only !!!
     lda linetableL,x
     sta xbyte
     sta oldplot
@@ -1111,7 +1115,7 @@ MakePlot
 
 
 
-    ldx ydraw
+    ldx ydraw	; lower byte only !!!
     lda linetableL,x
     sta xbyte
     lda linetableH,x
@@ -1157,7 +1161,7 @@ point .proc
 
 ;---
 
-    ldx ydraw
+    ldx ydraw	; lower byte only !!!
     lda linetableL,x
     sta xbyte
     lda linetableH,x
@@ -1251,7 +1255,7 @@ CopyMask
 ;---
     ldy xbyte
 
-    lda ydraw ; y = y - 7 because left lower. shouldn't it be 8?
+    lda ydraw ; y = y - 7 because left lower. shouldn't it be 8? - lower byte only !!!
     sec
     sbc #7
     tax