mem optimization, nicer explosions

display.asm

@@ -55,12 +55,10 @@ dl ; MAIN game display list
 
         .byte $4f
         .word display
-
+        :101 .by $0f
-        :100 .by $0f
-        .by $0f
         .by $4f
         .wo display+$0ff0
-        :100 .byte $0f ;97
+        :97 .byte $0f ;1+101+1+97 = 200
         .byte $41
         .word dl
 ;-----------------------------------------------

grafproc.asm

@@ -443,41 +443,12 @@ clearscreen .proc
 ;--------------------------------------------------
     lda #0
     tax
-Loopi1
+@
-    sta display,x
+    :31 sta display+($100*#),x
-    sta display+$100,x
+    sta display+$1e50,x  ; this is so no space outside of the screen is cleared
-    sta display+$200,x
+                         ; of course we are clearing $100 instead of $50, but who cares :]
-    sta display+$300,x
-    sta display+$400,x
-    sta display+$500,x
-    sta display+$600,x
-    sta display+$700,x
-    sta display+$800,x
-    sta display+$900,x
-    sta display+$a00,x
-    sta display+$b00,x
-    sta display+$c00,x
-    sta display+$d00,x
-    sta display+$e00,x
-    sta display+$f00,x
-    sta display+$1000,x
-    sta display+$1100,x
-    sta display+$1200,x
-    sta display+$1300,x
-    sta display+$1400,x
-    sta display+$1500,x
-    sta display+$1600,x
-    sta display+$1700,x
-    sta display+$1800,x
-    sta display+$1900,x
-    sta display+$1a00,x
-    sta display+$1b00,x
-    sta display+$1c00,x
-    sta display+$1d00,x
-    sta display+$1e00,x
-    sta display+$1f00,x
     inx
-    bne Loopi1
+    bne @-
     rts
 .endp
 ;-------------------------------*------------------

scorch.asm

@@ -81,16 +81,14 @@ displayposition = modify
 
 	icl 'artwork/HIMARS14.asm'
     ;Game loading address
-    ORG  $3010 ;must be $2K after screen, because screen cleaning erases $2K
+    ORG  $3000
+WeaponFont
+    ins 'artwork/weapons_AW4.fnt'  ; 'artwork/weapons.fnt'
 ;-----------------------------------------------
-;Screen displays go first to avoid crossing 4kb barrier
+;Screen displays go here to avoid crossing 4kb barrier
 ;-----------------------------------------------
     icl 'display.asm'
 ;----------------------------------------------
-    .ALIGN $400
-WeaponFont
-    ins 'artwork/weapons_AW4.fnt'  ; 'artwork/weapons.fnt'
-    
     
 ;--------------------------------------------------
 ; Game Code

weapons.asm

@@ -549,16 +549,20 @@ ExplosionLoop
     lda radius
     cmp ExplosionRadius
     bcc ExplosionLoop
-    lda #0
+
-    sta color
+    ldx #0
+    stx color
+    inx
+    stx radius
 ExplosionLoop2
     jsr circle
-    dec radius
+    inc radius
     lda radius
-    bne ExplosionLoop2
+    cmp ExplosionRadius
-    lda #1
+    bcc ExplosionLoop2
-    sta color
 
+    mva #1 color
+        
 ;check tanks' distance from the centre of the explosion
 
     mwa #DrawLen DrawJumpAddr