51 lines
1.4 KiB
C
51 lines
1.4 KiB
C
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// license:BSD-3-Clause
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// copyright-holders:Hiromitsu Shioya, Olivier Galibert
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/*********************************************************/
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/* SEGA 8bit PCM */
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/*********************************************************/
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#ifndef MAMESOUND_SEGAPCM_H
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#define MAMESOUND_SEGAPCM_H
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#include <functional>
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//**************************************************************************
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// TYPE DEFINITIONS
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//**************************************************************************
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class segapcm_device {
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public:
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static constexpr int BANK_256 = 11;
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static constexpr int BANK_512 = 12;
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static constexpr int BANK_12M = 13;
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static constexpr int BANK_MASK7 = 0x70 << 16;
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static constexpr int BANK_MASKF = 0xf0 << 16;
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static constexpr int BANK_MASKF8 = 0xf8 << 16;
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short lastOut[16][2];
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segapcm_device();
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// configuration
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void set_bank(int bank) { m_bankshift = (bank & 0xf); m_bankmask = (0x70|((bank >> 16) & 0xfc)); }
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void set_read(std::function<unsigned char(unsigned int)> r) { read_byte = r; }
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void write(unsigned int offset, uint8_t data);
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uint8_t read(unsigned int offset);
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// device-level overrides
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void device_start();
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// sound stream update overrides
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void sound_stream_update(int* outputs);
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private:
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uint8_t m_ram[0x800];
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uint8_t m_low[16];
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int m_bankshift;
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int m_bankmask;
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std::function<unsigned char(unsigned int)> read_byte;
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};
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#endif // MAMESOUND_SEGAPCM_H
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