PPU init and cleanup

src/f6502.c

@@ -222,12 +222,7 @@ static inline int f6502_write(nes_Memory* mem,
                     // Copy to render reference
                     addr &= 0x1FU;
                     uint8_t* pal = mem->ppu.palette;
-                    if (0 == (addr & 0x3)) {
-                        // TODO: Just initialize this
-                        pal[0] = pal[4] = pal[8] = pal[12] =
-                            pal[16] = pal[20] = pal[24] =
-                            pal[28] = 0xFFU;
-                    } else {
+                    if (0 != (addr & 0x3)) {
                         pal[addr] = val & 0x3FU;
                     }
 

src/memory.h

@@ -42,11 +42,5 @@ static inline uint8_t* prg_rom_page(nes_Memory* mem, int page) {
     return &mem->rom[page * NES_PRG_ROM_PAGE_SIZE];
 }
 
-static inline uint8_t* prg_rom_last_page(nes_Memory* mem, int page) {
-    // TODO: Where's 0x2000U from?
-    return &mem->rom[   (mem->n_rom_banks * NES_PRG_ROM_PAGE_SIZE) -
-                        ((page + 1) * 0x2000U)];
-}
-
 
 #endif // NESE_MEMORY_H_

src/nes.c

@@ -9,7 +9,7 @@
 
 void nes_init(nes* sys) {
     f6502_init(&sys->core);
-    // TODO: Init PPU
+    nes_ppu_init(&sys->ppu, &sys->core.memory.ppu);
     // TODO: Init APU
 }
 
@@ -107,6 +107,7 @@ static int nes_hsync(nes* sys, void* plat) {
 }
 
 #define mapper_hsync_dot    (300U)
+#define render_dot          (256U)
 
 int nes_loop(nes* sys, void* plat) {
     int status = 0;

src/nes.h

@@ -11,7 +11,6 @@ typedef struct {
     const ines_Header* cart_header;
     f6502_Core core;
     nes_PPU ppu;
-    // TODO: PPU
     // TODO: APU
 } nes;
 

src/ppu.c

@@ -6,6 +6,14 @@
 #include "log.h"
 
 
+void nes_ppu_init(nes_PPU* ppu, nes_PPU_Memory* mem) {
+    uint8_t* pal = mem->palette;
+    pal[0] = pal[4] = pal[8] = pal[12] =
+        pal[16] = pal[20] = pal[24] =
+        pal[28] = 0xFFU;
+}
+
+
 static const uint8_t mirror_schemes[][4] = {
     [nes_Mirror_Horizontal] = {0, 0, 1, 1},
     [nes_Mirror_Vertical]   = {0, 1, 0, 1},

src/ppu.h

@@ -136,6 +136,8 @@ typedef struct {
     uint8_t screen_data[nes_ppu_render_w * nes_ppu_render_h];
 } nes_PPU;
 
+void nes_ppu_init(nes_PPU*, nes_PPU_Memory*);
+
 void nes_ppu_find_hit_line(nes_PPU*, nes_PPU_Memory*);
 
 void nes_ppu_render_line(nes_PPU*, nes_PPU_Memory*);