Faster C64 drawmountains proc.

2023-05-22 23:41:12 +02:00
parent cc522f7a13
commit b2770d9b82
2 changed files with 8 additions and 3 deletions
@@ -200,18 +200,23 @@ drawmountainsloop
    ;  X - index in bittable (number of bit) and nothing more (for use) in C64 :)
 ;    jmp IntoDraw    ; jumps inside Draw routine
                    ; because one pixel is already plotted (and who cares? :) )
    lda xdraw
    and #%11111000
    sta temp    ; store for a bit faster add
    clc     ; and faster
@
    lda (xbyte),y
    and bittable2,x
    sta (xbyte),y
 ;IntoDraw
    inc ydraw
-    lda xdraw
+    lda temp
-    and #%11111000
+;    lda xdraw
 ;    and #%11111000
    ;sta xbyte
    ;---
    ldy ydraw
-    clc
+;    clc    ; C allways clear ! ?
    adc linetableL,y
    sta xbyte
    lda linetableH,y