added scaffolding for apu

1 files changed, 13 insertions, 2 deletions

diff --git a/mknes.h b/mknes.h
index 8d12e95..0ae37f4 100644
--- a/mknes.h
+++ b/mknes.h
@@ -68,11 +68,22 @@ struct ppu_state {
 
 struct apu_state {
 	uint32_t frame_cycle;
+
 	uint8_t mode;
 	uint8_t irq_inhibit;
 	uint8_t irq_pending;
+
+	uint8_t dmc_irq_enable;
+	uint8_t dmc_loop_flag;
 	uint8_t dmc_dma_enabled;
-	uint32_t dmc_sample_timer;
+
+	uint8_t dmc_freq_index;
+	uint8_t dmc_sample_addr;
+	uint8_t dmc_sample_len;
+
+	uint16_t dmc_current_addr;
+	uint16_t dmc_bytes_remaining;
+	uint16_t dmc_sample_timer;
 } __attribute__((packed, aligned(64)));
 
 struct cpu_state {
@@ -110,7 +121,7 @@ struct nes_state {
 	union mapper_data mapper_data;
 	struct cpu_state cpu;
 	struct ines_state ines;
-	// struct apu_state apu;
+	struct apu_state apu;
 
 	uint8_t ram[RAM_SIZE]			__attribute__((aligned(4096)));
 	uint8_t ciram[CIRAM_SIZE]		__attribute__((aligned(4096)));