diff --git a/src/ppu.c b/src/ppu.c
index 602527d..8aeca32 100644
--- a/src/ppu.c
+++ b/src/ppu.c
@@ -34,7 +34,6 @@ void create_event_tables_ppu(ppu_t *ppu) {
             ppu->render_events[dot][i] = PPU_EVENT_IDLE;
             ppu->prerender_events[dot][i] = PPU_EVENT_IDLE;
             ppu->vblank_events[dot][i] = PPU_EVENT_IDLE;
-            ppu->visible_events[dot][i] = PPU_EVENT_IDLE;
         }
 
         // Skip the first cycle of every scanline
@@ -96,6 +95,12 @@ void create_event_tables_ppu(ppu_t *ppu) {
         if (dot >= 257 && dot <= 320) {
             ppu->render_events[dot][i++] = PPU_EVENT_CLEAR_OAMADDR;
         }
+        if (dot <= 64) {
+            ppu->render_events[dot][i++] = PPU_EVENT_CLEAR_OAM;
+        }
+        if (dot >= 65 && dot <= 256) {
+            ppu->render_events[dot][i++] = PPU_EVENT_EVALUATE_SPRITES;
+        }
     }
 }
 
@@ -373,6 +378,32 @@ void set_vblank_ppu(ppu_t *ppu) {
     }
 }
 
+void clear_oam_ppu(ppu_t *ppu) {
+    // Clear the OAM
+}
+
+void evaluate_sprites_ppu(ppu_t *ppu) {
+    // Implement sprite evaluation
+}
+
+void fetch_sprite_pattern_lo_ppu(ppu_t *ppu) {
+    // bool bg_ctrl = ppu->ctrl & PPU_CTRL_PATTERN_TABLE_BG;
+    // address_t pt_base = bg_ctrl * 0x1000;
+    // address_t fine_y = (ppu->v >> 12) & 0x7;
+    // address_t pt_offset = (ppu->nt_latch << 4) | fine_y;
+    // address_t pt_address = pt_base + pt_offset;
+    // ppu->pt_latches[0] = read_ppu_bus(ppu->bus, pt_address);
+}
+
+void fetch_sprite_pattern_hi_ppu(ppu_t *ppu) {
+    // bool bg_ctrl = ppu->ctrl & PPU_CTRL_PATTERN_TABLE_BG;
+    // address_t pt_base = bg_ctrl * 0x1000;
+    // address_t fine_y = (ppu->v >> 12) & 0x7;
+    // address_t pt_offset = (ppu->nt_latch << 4) | fine_y;
+    // address_t pt_address = pt_base + pt_offset + 8;
+    // ppu->pt_latches[1] = read_ppu_bus(ppu->bus, pt_address);
+}
+
 void draw_dot_ppu(ppu_t *ppu) {
     unsigned short x_mask = 0x8000 >> ppu->x;
 
@@ -470,6 +501,18 @@ void execute_events_ppu(ppu_t *ppu, ppu_event_t *events) {
         case PPU_EVENT_SET_VBLANK:
             set_vblank_ppu(ppu);
             break;
+        case PPU_EVENT_CLEAR_OAM:
+            clear_oam_ppu(ppu);
+            break;
+        case PPU_EVENT_EVALUATE_SPRITES:
+            evaluate_sprites_ppu(ppu);
+            break;
+        case PPU_EVENT_FETCH_PATTERN_SPRITE_LO:
+            fetch_sprite_pattern_lo_ppu(ppu);
+            break;
+        case PPU_EVENT_FETCH_PATTERN_SPRITE_HI:
+            fetch_sprite_pattern_hi_ppu(ppu);
+            break;
         case PPU_EVENT_IDLE:
             break;
         }
diff --git a/src/ppu.h b/src/ppu.h
index 3e6898b..041e08d 100644
--- a/src/ppu.h
+++ b/src/ppu.h
@@ -54,6 +54,8 @@ typedef enum {
     PPU_EVENT_FETCH_ATTRIBUTE,
     PPU_EVENT_FETCH_PATTERN_LO,
     PPU_EVENT_FETCH_PATTERN_HI,
+    PPU_EVENT_FETCH_PATTERN_SPRITE_LO,
+    PPU_EVENT_FETCH_PATTERN_SPRITE_HI,
     PPU_EVENT_SHIFT_REGISTERS,
     PPU_EVENT_RELOAD_SHIFTERS,
     PPU_EVENT_COPY_X,
@@ -64,6 +66,8 @@ typedef enum {
     PPU_EVENT_CLEAR_FLAGS,
     PPU_EVENT_SET_VBLANK,
     PPU_EVENT_SKIP_CYCLE,
+    PPU_EVENT_CLEAR_OAM,
+    PPU_EVENT_EVALUATE_SPRITES,
 } ppu_event_t;
 
 typedef struct {
@@ -135,6 +139,18 @@ typedef struct {
      */
     unsigned char pt_latches[2];
 
+    /**
+     * @brief Palette attribute latches for up to 8 sprites.
+     *
+     */
+    unsigned char sprite_latches[8];
+
+    /**
+     * @brief X-positions for up to 8 sprites.
+     *
+     */
+    unsigned char sprite_counters[8];
+
     /**
      * @brief Pattern table shift registers. The high 8 bits are the current
      * tile. Every 8 cycles, new data is loaded into the low 8 bits of the
@@ -151,6 +167,12 @@ typedef struct {
      */
     unsigned short pa_shift[2];
 
+    /**
+     * @brief Pattern table shift registers for up to 8 sprites.
+     *
+     */
+    unsigned short sprite_shift[16];
+
     /**
      * @brief Primary object attribute memory.
      *
@@ -181,6 +203,12 @@ typedef struct {
      */
     unsigned char io_databus;
 
+    /**
+     * @brief Buffer for reading from OAM.
+     *
+     */
+    unsigned char buffer_oam;
+
     /**
      * @brief Toggle to suppress setting VBlank.
      *
@@ -235,12 +263,6 @@ typedef struct {
      */
     interrupt_t *interrupt;
 
-    /**
-     * @brief Events in the visible scanlines.
-     *
-     */
-    ppu_event_t visible_events[PPU_LINEDOTS][PPU_EVENTS_PER_DOT];
-
     /**
      * @brief Events in the render and pre-render scanlines.
      *