diff options
Diffstat (limited to 'basics/sprite.s')
| -rw-r--r-- | basics/sprite.s | 17 |
1 files changed, 4 insertions, 13 deletions
diff --git a/basics/sprite.s b/basics/sprite.s index 1fa55ad..1892ce5 100644 --- a/basics/sprite.s +++ b/basics/sprite.s @@ -386,17 +386,8 @@ palettes: .byte $0F, $00, $00, $00 .endproc -;; WRITE_PPU_DATA is a macro that will write into PPUADDR the given address and -;; into PPUDATA the given byte value. -.macro WRITE_PPU_DATA address, value - bit $2002 ; PPUSTATUS - lda #.HIBYTE(address) - sta $2006 ; PPUADDR - lda #.LOBYTE(address) - sta $2006 ; PPUADDR - lda #value - sta $2007 ; PPUDATA -.endmacro +;; Include the WRITE_PPU_DATA macro. More on this below. +.include "../shared/ppu.s" ;; init_nametable loads the relevant data to the nametable that is then going to ;; be used in order to build up the background. @@ -468,8 +459,8 @@ palettes: ;; Now we have to do the same for the rest of the elements. I have gone ;; through the same process of fetching the offset from a canvas I drew on ;; NEXXT and here's the result. Instead of repeating te same code over and - ;; over but with slightly different values, I am using this macro I created - ;; to do the same. + ;; over but with slightly different values, I am using the WRITE_PPU_DATA + ;; from `shared/ppu.s` to do the same. WRITE_PPU_DATA $20B9, $04 WRITE_PPU_DATA $21CE, $04 WRITE_PPU_DATA $21BA, $04 |