Streamline the OAM copy

2023-06-27 21:49:52 -05:00 · 2023-06-27 21:49:52 -05:00 · 576c402d0b
parent 4c13373bd3
commit 576c402d0b
1 changed files with 2 additions and 14 deletions
--- a/demos/smb/ppu.s
+++ b/demos/smb/ppu.s
@ -572,30 +572,18 @@ no_pal
 ; Trigger a copy from a page of memory to OAM.  Since this is a DMA operation, we can cheat and do a 16-bit copy
 PPUDMA_WRITE ENT
        php
-        phb
-        phk
-        plb
-
-        phx
        pha

        rep  #$30
-        xba
-        and  #$FF00
-        tax
-
 ]n      equ   0
        lup   128
-        ldal  ROMBase+]n,x
-        sta   PPU_OAM+]n
+        lda   ROMBase+$200+]n
+        stal  PPU_OAM+]n
 ]n      =     ]n+2
        --^
-
        sep #$30

        pla
-        plx
-        plb
        plp
        rtl