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#ifndef __SNS_SDD1_H
#define __SNS_SDD1_H
#include "machine/sns_slot.h"
// misc classes for the S-DD1
class SDD1__IM //Input Manager
{
public:
SDD1__IM() {}
UINT32 m_byte_ptr;
UINT8 m_bit_count;
void IM_prepareDecomp(UINT32 in_buf);
UINT8 IM_getCodeword(UINT8 *ROM, UINT32 *mmc, const UINT8 code_len);
};
class SDD1__GCD //Golomb-Code Decoder
{
public:
SDD1__GCD(SDD1__IM* associatedIM)
: m_IM(associatedIM) { }
SDD1__IM* m_IM;
void GCD_getRunCount(UINT8 *ROM, UINT32 *mmc, UINT8 code_num, UINT8* MPScount, UINT8* LPSind);
};
class SDD1__BG // Bits Generator
{
public:
SDD1__BG(SDD1__GCD* associatedGCD, UINT8 code)
: m_code_num(code),
m_GCD(associatedGCD) { }
UINT8 m_code_num;
UINT8 m_MPScount;
UINT8 m_LPSind;
SDD1__GCD* m_GCD;
void BG_prepareDecomp();
UINT8 BG_getBit(UINT8 *ROM, UINT32 *mmc, UINT8* endOfRun);
} ;
struct SDD1__PEM_ContextInfo
{
UINT8 status;
UINT8 MPS;
};
class SDD1__PEM //Probability Estimation Module
{
public:
SDD1__PEM(
SDD1__BG* associatedBG0, SDD1__BG* associatedBG1,
SDD1__BG* associatedBG2, SDD1__BG* associatedBG3,
SDD1__BG* associatedBG4, SDD1__BG* associatedBG5,
SDD1__BG* associatedBG6, SDD1__BG* associatedBG7)
{
m_BG[0] = associatedBG0;
m_BG[1] = associatedBG1;
m_BG[2] = associatedBG2;
m_BG[3] = associatedBG3;
m_BG[4] = associatedBG4;
m_BG[5] = associatedBG5;
m_BG[6] = associatedBG6;
m_BG[7] = associatedBG7;
}
SDD1__PEM_ContextInfo m_contextInfo[32];
SDD1__BG* m_BG[8];
void PEM_prepareDecomp();
UINT8 PEM_getBit(UINT8 *ROM, UINT32 *mmc, UINT8 context);
} ;
class SDD1__CM
{
public:
SDD1__CM(SDD1__PEM* associatedPEM)
: m_PEM(associatedPEM) { }
UINT8 m_bitplanesInfo;
UINT8 m_contextBitsInfo;
UINT8 m_bit_number;
UINT8 m_currBitplane;
UINT16 m_prevBitplaneBits[8];
SDD1__PEM* m_PEM;
void CM_prepareDecomp(UINT8 *ROM, UINT32 *mmc, UINT32 first_byte);
UINT8 CM_getBit(UINT8 *ROM, UINT32 *mmc);
} ;
class SDD1__OL
{
public:
SDD1__OL(SDD1__CM* associatedCM)
: m_CM(associatedCM) { }
UINT8 m_bitplanesInfo;
UINT16 m_length;
UINT8* m_buffer;
SDD1__CM* m_CM;
void OL_prepareDecomp(UINT8 *ROM, UINT32 *mmc, UINT32 first_byte, UINT16 out_len, UINT8 *out_buf);
void OL_launch(UINT8 *ROM, UINT32 *mmc);
} ;
class SDD1__emu
{
public:
SDD1__emu(running_machine &machine);
running_machine &machine() const { return m_machine; }
SDD1__IM* m_IM;
SDD1__GCD* m_GCD;
SDD1__BG* m_BG0; SDD1__BG* m_BG1; SDD1__BG* m_BG2; SDD1__BG* m_BG3;
SDD1__BG* m_BG4; SDD1__BG* m_BG5; SDD1__BG* m_BG6; SDD1__BG* m_BG7;
SDD1__PEM* m_PEM;
SDD1__CM* m_CM;
SDD1__OL* m_OL;
void SDD1emu_decompress(UINT8 *ROM, UINT32 *mmc, UINT32 in_buf, UINT16 out_len, UINT8 *out_buf);
private:
running_machine& m_machine;
};
// ======================> sns_rom_sdd1_device
class sns_rom_sdd1_device : public device_t,
public device_sns_cart_interface
{
public:
// construction/destruction
sns_rom_sdd1_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock);
sns_rom_sdd1_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
// device-level overrides
virtual void device_start();
virtual void device_config_complete() { m_shortname = "sns_rom_sdd1"; }
// reading and writing
virtual DECLARE_READ8_MEMBER(read_l);
virtual DECLARE_READ8_MEMBER(read_h);
virtual DECLARE_WRITE8_MEMBER(write_l);
virtual DECLARE_READ8_MEMBER(chip_read);
virtual DECLARE_WRITE8_MEMBER(chip_write);
UINT8 read_helper(UINT32 offset);
UINT8 m_sdd1_enable; // channel bit-mask
UINT8 m_xfer_enable; // channel bit-mask
UINT32 m_mmc[4]; // memory map controller ROM indices
struct
{
UINT32 addr; // $43x2-$43x4 -- DMA transfer address
UINT16 size; // $43x5-$43x6 -- DMA transfer size
} m_dma[8];
SDD1__emu* m_sdd1emu;
struct
{
UINT8 *data; // pointer to decompressed S-DD1 data (65536 bytes)
UINT16 offset; // read index into S-DD1 decompression buffer
UINT32 size; // length of data buffer; reads decrement counter, set ready to false at 0
UINT8 ready; // 1 when data[] is valid; 0 to invoke sdd1emu.decompress()
} m_buffer;
};
// device type definition
extern const device_type SNS_LOROM_SDD1;
#endif
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