76 lines
1.2 KiB
C
76 lines
1.2 KiB
C
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// NES APU snapshot support
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// Nes_Snd_Emu 0.1.7. Copyright (C) 2003-2005 Shay Green. GNU LGPL license.
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#ifndef APU_SNAPSHOT_H
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#define APU_SNAPSHOT_H
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#include "blargg_common.h"
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struct apu_snapshot_t
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{
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typedef BOOST::uint8_t byte;
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typedef byte env_t [3];
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/*struct env_t {
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byte delay;
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byte env;3
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byte written;
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};*/
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byte w40xx [0x14]; // $4000-$4013
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byte w4015; // enables
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byte w4017; // mode
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BOOST::uint16_t delay;
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byte step;
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byte irq_flag;
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struct square_t {
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BOOST::uint16_t delay;
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env_t env;
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byte length;
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byte phase;
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byte swp_delay;
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byte swp_reset;
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byte unused [1];
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};
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square_t square1;
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square_t square2;
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struct triangle_t {
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BOOST::uint16_t delay;
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byte length;
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byte phase;
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byte linear_counter;
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byte linear_mode;
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} triangle;
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struct noise_t {
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BOOST::uint16_t delay;
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env_t env;
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byte length;
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BOOST::uint16_t shift_reg;
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} noise;
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struct dmc_t {
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BOOST::uint16_t delay;
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BOOST::uint16_t remain;
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BOOST::uint16_t addr;
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byte buf;
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byte bits_remain;
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byte bits;
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byte buf_empty;
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byte silence;
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byte irq_flag;
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} dmc;
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enum { tag = 'APUR' };
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void swap();
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};
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BOOST_STATIC_ASSERT( sizeof (apu_snapshot_t) == 72 );
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#endif
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