Initial commit

2023-03-05 07:03:54 +01:00
commit 09c1bdd874
100 changed files with 142957 additions and 0 deletions
--- a/src/snes/snes.h
+++ b/src/snes/snes.h
@@ -0,0 +1,95 @@
+
+#ifndef SNES_H
+#define SNES_H
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+#include <stdbool.h>
+
+typedef struct Snes Snes;
+
+#include "cpu.h"
+#include "apu.h"
+#include "dma.h"
+#include "ppu.h"
+#include "cart.h"
+#include "input.h"
+#include "saveload.h"
+
+struct Snes {
+  Cpu* cpu;
+  Apu* apu;
+  Ppu* ppu, *snes_ppu, *my_ppu;
+  Dma* dma;
+  Cart* cart;
+  // input
+  bool debug_cycles;
+  bool debug_apu_cycles;
+  bool disableRender;
+  uint8_t runningWhichVersion;
+  Input* input1;
+  Input* input2;
+  // ram
+  uint8_t *ram;
+  uint32_t ramAdr;
+  // frame timing
+  uint16_t hPos;
+  uint16_t vPos;
+  uint32_t frames;
+  // cpu handling
+  uint8_t cpuCyclesLeft;
+  uint8_t cpuMemOps;
+  double apuCatchupCycles;
+  // nmi / irq
+  bool hIrqEnabled;
+  bool vIrqEnabled;
+  bool nmiEnabled;
+  uint16_t hTimer;
+  uint16_t vTimer;
+  bool inNmi;
+  bool inIrq;
+  bool inVblank;
+  // joypad handling
+  uint16_t portAutoReadX[4]; // as read by auto-joypad read
+  bool autoJoyRead;
+  uint16_t autoJoyTimer; // times how long until reading is done
+  bool ppuLatch;
+  // multiplication/division
+  uint8_t multiplyA;
+  uint16_t multiplyResult;
+  uint16_t divideA;
+  uint16_t divideResult;
+  // misc
+  bool fastMem;
+  uint8_t openBus;
+};
+
+Snes* snes_init(uint8_t *ram);
+void snes_free(Snes* snes);
+void snes_reset(Snes* snes, bool hard);
+void snes_runFrame(Snes* snes);
+// used by dma, cpu
+uint8_t snes_readBBus(Snes* snes, uint8_t adr);
+void snes_writeBBus(Snes* snes, uint8_t adr, uint8_t val);
+uint8_t snes_read(Snes* snes, uint32_t adr);
+void snes_write(Snes* snes, uint32_t adr, uint8_t val);
+uint8_t snes_cpuRead(Snes* snes, uint32_t adr);
+void snes_cpuWrite(Snes* snes, uint32_t adr, uint8_t val);
+// debugging
+void snes_debugCycle(Snes* snes, bool* cpuNext, bool* spcNext);
+
+void snes_handle_pos_stuff(Snes *snes);
+
+// snes_other.c functions:
+
+bool snes_loadRom(Snes* snes, const uint8_t* data, int length);
+void snes_setPixels(Snes* snes, uint8_t* pixelData);
+void snes_setSamples(Snes* snes, int16_t* sampleData, int samplesPerFrame);
+void snes_saveload(Snes *snes, SaveLoadFunc *func, void *ctx);
+uint8_t snes_readBBusOrg(Snes *snes, uint8_t adr);
+void snes_catchupApu(Snes *snes);
+
+extern int snes_frame_counter;
+#endif