Mercurial > repos > blastem
comparison ym2612.h @ 1798:5278b6e44fc1
Optionally emulate the offset around zero in the imperfect DAC of a discrete YM2612
author | Michael Pavone <pavone@retrodev.com> |
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date | Sun, 24 Mar 2019 19:59:41 -0700 |
parents | 804f13c090b4 |
children | ce6881d64eef |
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1797:5ff8f0d28188 | 1798:5278b6e44fc1 |
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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); |