.macro PPU_SETADDR addr
  bit PPU_STATUS      ; read from PPU_STATUS to reset latch
  lda #>addr          ; > means get high byte from `addr`
  sta PPU_ADDR
  lda #<addr          ; < means get low byte from `addr`
  sta PPU_ADDR
.endmacro

.macro PPU_SETDATA val
  lda val
  sta PPU_DATA
.endmacro