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alexbevi
GitHub Repository: alexbevi/BizHawk
 Path: blob/master/libsnes/bsnes/snes/cpu/dma/dma.hpp
2 views
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struct {

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  //$420b

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  bool dma_enabled;

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  //$420c

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  bool hdma_enabled;

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  //$43x0

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  bool direction;

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  bool indirect;

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  bool unused;

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  bool reverse_transfer;

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  bool fixed_transfer;

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  uint3 transfer_mode;

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  //$43x1

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  uint8 dest_addr;

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  //$43x2-$43x3

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  uint16 source_addr;

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  //$43x4

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  uint8 source_bank;

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  //$43x5-$43x6

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  union {

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    uint16 transfer_size;

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    uint16 indirect_addr;

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  };

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  //$43x7

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  uint8 indirect_bank;

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  //$43x8-$43x9

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  uint16 hdma_addr;

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  //$43xa

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  uint8 line_counter;

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  //$43xb/$43xf

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  uint8 unknown;

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  //internal state

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  bool hdma_completed;

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  bool hdma_do_transfer;

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} channel[8];

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struct {

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  bool valid;

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  unsigned addr;

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  uint8 data;

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} pipe;

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void dma_add_clocks(unsigned clocks);

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bool dma_transfer_valid(uint8 bbus, uint32 abus);

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bool dma_addr_valid(uint32 abus);

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uint8 dma_read(uint32 abus);

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void dma_write(bool valid, unsigned addr = 0, uint8 data = 0);

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void dma_transfer(bool direction, uint8 bbus, uint32 abus);

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uint8 dma_bbus(unsigned i, unsigned channel);

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uint32 dma_addr(unsigned i);

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uint32 hdma_addr(unsigned i);

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uint32 hdma_iaddr(unsigned i);

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uint8 dma_enabled_channels();

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bool hdma_active(unsigned i);

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bool hdma_active_after(unsigned i);

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uint8 hdma_enabled_channels();

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uint8 hdma_active_channels();

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void dma_run();

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void hdma_update(unsigned i);

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void hdma_run();

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void hdma_init_reset();

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void hdma_init();

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void dma_power();

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void dma_reset();

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