diff options
Diffstat (limited to 'basics/sprite.s')
| -rw-r--r-- | basics/sprite.s | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/basics/sprite.s b/basics/sprite.s index ac68d7f..09dd8e5 100644 --- a/basics/sprite.s +++ b/basics/sprite.s @@ -49,9 +49,8 @@ ;; The previous are the mandatory bytes in order to get a "cartridge" going. ;; After this there are some other bytes you can put into the header, like - ;; if the "cartridge" counts on a battery-backed RAM-mapped section to save - ;; states (e.g. The Legend of Zelda) or rare flags like specifying the - ;; region (NTSC vs PAL), but for now this falls out of my radar :-) + ;; specifying the region (NTSC vs PAL), but for now this falls out of my + ;; radar :-) ;;; ;; This is the segment where we tell the processor where to find the code for @@ -422,8 +421,8 @@ palettes: ;; offset for the first element was $00C8, which added to the base address ;; of $2000 (start of the first nametable), gives us the address $20C8. ;; Therefore, if I want this background element to be rendered in the - ;; position I envisioned on this tool, I need to write $20C8 into PPUADDR - ;; (NOTE: these are a total of two bytes to be loaded, for operations that + ;; position I envisioned on this tool, I need to write $20C8 into PPUADDR. + ;; NOTE: these are a total of two bytes to be loaded, for operations that ;; only support one byte at a time. Hence, we have to load byte by byte (in ;; little-endian format) and store them. As for the PPUDATA address, I need ;; to pass #$02 because that's the index inside of the CHR file of the star |