mirror of https://github.com/bsnes-emu/bsnes.git
80 lines
1.4 KiB
C++
Executable File
80 lines
1.4 KiB
C++
Executable File
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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uint8 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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