1 files changed, 0 insertions, 150 deletions
diff --git a/ppu_registers.c b/ppu_registers.c
deleted file mode 100644
index 8423774..0000000
--- a/ppu_registers.c
+++ /dev/null
@@ -1,150 +0,0 @@
-__attribute__((hot, flatten))
-static inline void ppu_write(struct nes_state *state, uint32_t offset, uint8_t value) {
-	struct ppu_state *ppu = &state->ppu;
-
-	uint32_t reg = offset & 0x7;
-
-	if(reg == 4) {
-		ppu->oam[ppu->oam_addr++] = value;
-		ppu->open_bus = value;
-		return;
-
-	} else if(reg == 1) {
-		ppu->reg_mask = value;
-		ppu->open_bus = value;
-		return;
-
-	} else if(reg == 0) {
-		ppu->reg_ctrl = value;
-		ppu->temp_addr = (ppu->temp_addr & 0xf3ff) | ((value & 0x03) << 10);
-		ppu->open_bus = value;
-		return;
-
-	} else if(reg == 3) {
-		ppu->oam_addr = value;
-		ppu->open_bus = value;
-		return;
-
-	} else if(reg == 5) {
-		if(ppu->write_latch == 0) {
-			ppu->fine_x = value & 0x07;
-			ppu->temp_addr = (ppu->temp_addr & ~0x001f) | (value >> 3);
-			ppu->write_latch = 1;
-		} else {
-			ppu->temp_addr = (ppu->temp_addr & ~0x73e0) | ((value & 0x07) << 12) | ((value & 0xf8) << 2);
-			ppu->write_latch = 0;
-		}
-		ppu->open_bus = value;
-		return;
-
-	} else if(reg == 6) {
-		if(ppu->write_latch == 0) {
-			ppu->temp_addr = (ppu->temp_addr & 0x00ff) | ((value & 0x3f) << 8);
-			ppu->write_latch = 1;
-		} else {
-			ppu->temp_addr = (ppu->temp_addr & 0xff00) | value;
-			ppu->vram_addr = ppu->temp_addr;
-			ppu->write_latch = 0;
-		}
-		ppu->open_bus = value;
-		return;
-
-	} else if(reg == 7) {
-		uint32_t addr = ppu->vram_addr;
-		if(addr < 0x2000) {
-			state->mapper_function.chr_write(state, addr, value);
-
-		} else if(addr < 0x3f00) {
-			state->mapper_function.ciram_write(state, addr, value);
-
-		} else if(addr < 0x4000) {
-			uint32_t pal_addr = addr & 0x1f;
-			if((pal_addr & 3) == 0) {
-				pal_addr &= ~0x10;
-			}
-			ppu->palette[pal_addr] = value;
-		}
-		ppu->vram_addr += (ppu->reg_ctrl & 0x04) ? 32 : 1;
-		ppu->open_bus = value;
-		return;
-	}
-}
-
-__attribute__((hot, flatten))
-static inline uint8_t ppu_read(struct nes_state *state, uint32_t offset) {
-	struct ppu_state *ppu = &state->ppu;
-	uint8_t result = ppu->open_bus;
-
-	uint32_t reg = offset & 0x7;
-
-	if(reg == 2) {
-		result = ppu->reg_status;
-		ppu->reg_status &= ~0x80;
-		ppu->write_latch = 0;
-		ppu->open_bus = result;
-		return result;
-
-	} else if(reg == 4) {
-		result = ppu->oam[ppu->oam_addr];
-		ppu->open_bus = result;
-		return result;
-
-	} else if(reg == 7) {
-		uint32_t addr = ppu->vram_addr;
-
-		if(addr < 0x2000) {
-			result = ppu->vram_read_buffer;
-			ppu->vram_read_buffer =  state->mapper_function.chr_read(state, addr);
-
-		} else if(addr < 0x3f00) {
-			result = ppu->vram_read_buffer;
-			ppu->vram_read_buffer = state->mapper_function.ciram_read(state, addr);
-
-		} else if(addr < 0x4000) {
-			uint32_t pal_addr = addr & 0x1f;
-			if((pal_addr & 0x13) == 0x10) {
-				pal_addr &= ~0x10;
-			}
-			result = ppu->palette[pal_addr];
-		}
-
-		ppu->vram_addr += (ppu->reg_ctrl & 0x04) ? 32 : 1;
-		ppu->open_bus = result;
-		return result;
-
-	}
-
-	return result;
-}
-
-static uint8_t memory_read_dma(struct nes_state *state, uint32_t offset);
-
-__attribute__((hot))
-static inline void ppu_dma_4014(struct nes_state *state, uint8_t page) {
-	uint32_t base = page << 8;
-
-	// Add 1 or 2 idle cycles depending on current CPU cycle
-	uint8_t idle_cycles = (state->cpu.cycles & 1) ? 1 : 2;
-	for(uint8_t i = 0; i < idle_cycles; i++) {
-		state->cpu.cycles++;
-		ppu_tick(state);
-		apu_tick(state);
-	}
-
-	for(uint32_t i = 0; i < 256; i++) {
-		uint32_t addr = base + i;
-
-		state->cpu.cycles++;
-		ppu_tick(state);
-		apu_tick(state);
-		uint8_t value = memory_read_dma(state, addr);
-
-		state->cpu.cycles++;
-		ppu_tick(state);
-		apu_tick(state);
-
-		ppu_write(state, 4, value);
-	}
-}
-
-