shave another 197109 cycles off HGR per-pixel fizzle fade

now 45% faster than yesterday
2024-12-26 04:33:10 +00:00 · 2020-09-03 19:38:38 -04:00 · 2020-09-03 19:38:38 -04:00 · ab80cfa04b
commit ab80cfa04b
parent a48216f841
1 changed files with 6 additions and 5 deletions
--- a/src/fx/fx.hgr.1bit.fizzle.a
+++ b/src/fx/fx.hgr.1bit.fizzle.a
@ -17,12 +17,13 @@ rnd2=$ff

         ;iterate

+         ldx   #0
@loop
         lda   rnd1
+@loop2
         eor   #$ff
         sta   $26
         sta   $3c
-         ldx   rnd2
         lsr   rnd2
         ror   rnd1
         bcc   +
@ -62,14 +63,14 @@ rnd2=$ff

         ;wait while checking for keypress

-         ldx   $c000
+         lda   $c000
         bmi   @exit

         ;exit condition 2

-         ldx   rnd1
-         dex
-         bne   @loop
+         lda   rnd1
+         cmp   #1
+         bne   @loop2

@exit    rts