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comparison ym2612.h @ 1798:5278b6e44fc1

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Optionally emulate the offset around zero in the imperfect DAC of a discrete YM2612
author Michael Pavone <pavone@retrodev.com>
date Sun, 24 Mar 2019 19:59:41 -0700
parents 804f13c090b4
children ce6881d64eef
comparison
equal deleted inserted replaced
1797:5ff8f0d28188 1798:5278b6e44fc1
68 uint32_t clock_inc; 68 uint32_t clock_inc;
69 uint32_t current_cycle; 69 uint32_t current_cycle;
70 //TODO: Condense the next two fields into one 70 //TODO: Condense the next two fields into one
71 uint32_t write_cycle; 71 uint32_t write_cycle;
72 uint32_t busy_cycles; 72 uint32_t busy_cycles;
73 uint32_t lowpass_alpha; 73 int32_t volume_mult;
74 int32_t volume_div;
74 ym_operator operators[NUM_OPERATORS]; 75 ym_operator operators[NUM_OPERATORS];
75 ym_channel channels[NUM_CHANNELS]; 76 ym_channel channels[NUM_CHANNELS];
77 int16_t zero_offset;
76 uint16_t timer_a; 78 uint16_t timer_a;
77 uint16_t timer_a_load; 79 uint16_t timer_a_load;
78 uint16_t env_counter; 80 uint16_t env_counter;
79 ym_supp ch3_supp[3]; 81 ym_supp ch3_supp[3];
80 uint8_t timer_b; 82 uint8_t timer_b;
126 }; 128 };
127 129
128 void ym_init(ym2612_context * context, uint32_t master_clock, uint32_t clock_div, uint32_t options); 130 void ym_init(ym2612_context * context, uint32_t master_clock, uint32_t clock_div, uint32_t options);
129 void ym_reset(ym2612_context *context); 131 void ym_reset(ym2612_context *context);
130 void ym_free(ym2612_context *context); 132 void ym_free(ym2612_context *context);
133 void ym_enable_zero_offset(ym2612_context *context, uint8_t enabled);
131 void ym_adjust_master_clock(ym2612_context * context, uint32_t master_clock); 134 void ym_adjust_master_clock(ym2612_context * context, uint32_t master_clock);
132 void ym_run(ym2612_context * context, uint32_t to_cycle); 135 void ym_run(ym2612_context * context, uint32_t to_cycle);
133 void ym_address_write_part1(ym2612_context * context, uint8_t address); 136 void ym_address_write_part1(ym2612_context * context, uint8_t address);
134 void ym_address_write_part2(ym2612_context * context, uint8_t address); 137 void ym_address_write_part2(ym2612_context * context, uint8_t address);
135 void ym_data_write(ym2612_context * context, uint8_t value); 138 void ym_data_write(ym2612_context * context, uint8_t value);