Initial commit

src/snes/apu.h

@@ -0,0 +1,50 @@
+
+#ifndef APU_H
+#define APU_H
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+#include <stdbool.h>
+
+typedef struct Apu Apu;
+
+#include "snes.h"
+#include "spc.h"
+#include "dsp.h"
+
+typedef struct Timer {
+  uint8_t cycles;
+  uint8_t divider;
+  uint8_t target;
+  uint8_t counter;
+  bool enabled;
+} Timer;
+
+struct Apu {
+  Spc* spc;
+  Dsp* dsp;
+  uint8_t ram[0x10000];
+  bool romReadable;
+  uint8_t dspAdr;
+  uint32_t cycles;
+  uint8_t inPorts[6]; // includes 2 bytes of ram
+  uint8_t outPorts[4];
+  Timer timer[3];
+  uint8_t cpuCyclesLeft;
+
+  union {
+    struct DspRegWriteHistory hist;
+    void *padpad;
+  };
+};
+
+Apu* apu_init();
+void apu_free(Apu* apu);
+void apu_reset(Apu* apu);
+void apu_cycle(Apu* apu);
+uint8_t apu_cpuRead(Apu* apu, uint16_t adr);
+void apu_cpuWrite(Apu* apu, uint16_t adr, uint8_t val);
+void apu_saveload(Apu *apu, SaveLoadFunc *func, void *ctx);
+#endif