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Decoupled the IDE bus master emulation from the hard drive emulation [smf]

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smf- 2013-06-10 08:42:39 +00:00
parent c4deaaf91a
commit 407e3b8882
2 changed files with 416 additions and 456 deletions
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828
src/emu/machine/idectrl.c
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44
src/emu/machine/idectrl.h
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@ -101,8 +101,8 @@ public:
DECLARE_WRITE16_MEMBER(write_cs0_pc);
DECLARE_WRITE16_MEMBER(write_cs1_pc);
void signal_interrupt();
void clear_interrupt();
virtual void set_irq(int state);
virtual void set_dmarq(int state);
void read_sector_done();
void write_sector_done();
@ -113,21 +113,7 @@ protected:
virtual void device_start();
virtual void device_reset();
const char *bmcpu;
UINT32 bmspace;
address_space * dma_space;
UINT8 dma_active;
UINT8 dma_address_xor;
UINT8 dma_last_buffer;
offs_t dma_address;
offs_t dma_descriptor;
UINT32 dma_bytes_left;
UINT8 bus_master_command;
UINT8 bus_master_status;
UINT32 bus_master_descriptor;
void read_next_sector();
void read_buffer_from_dma();
void continue_write();
private:
@ -135,12 +121,12 @@ private:
void next_sector();
void security_error();
void continue_read();
void write_buffer_to_dma();
void read_first_sector();
void handle_command(UINT8 _command);
void read_buffer_empty();
void write_buffer_full();
UINT8 dma_active;
UINT8 adapter_control;
UINT8 error;
UINT8 command;
@ -194,6 +180,30 @@ public:
DECLARE_READ32_MEMBER( ide_bus_master32_r );
DECLARE_WRITE32_MEMBER( ide_bus_master32_w );
virtual void set_irq(int state);
virtual void set_dmarq(int state);
protected:
virtual void device_start();
private:
void execute_dma();
const char *bmcpu;
UINT32 bmspace;
address_space * dma_space;
UINT8 dma_address_xor;
offs_t dma_address;
UINT32 dma_bytes_left;
offs_t dma_descriptor;
UINT8 dma_last_buffer;
UINT8 bus_master_command;
UINT8 bus_master_status;
UINT32 bus_master_descriptor;
int m_irq;
int m_dmarq;
};
extern const device_type BUS_MASTER_IDE_CONTROLLER;