Mercurial > repos > blastem
annotate psg.h @ 865:305c85c0b954
Allow 68K debug print to read from arbitrary memory regions
author | Michael Pavone <pavone@retrodev.com> |
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date | Fri, 06 Nov 2015 11:44:51 -0800 |
parents | 9a5dc22297f2 |
children | 252dfd29831d |
rev | line source |
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Added copyright notice to source files and added GPL license text in COPYING
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1 /* |
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2 Copyright 2013 Michael Pavone |
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3 This file is part of BlastEm. |
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4 BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text. |
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5 */ |
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Initial PSG support. Mostly works, noise channel is borked though.
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6 #ifndef PSG_CONTEXT_H_ |
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7 #define PSG_CONTEXT_H_ |
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8 |
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9 #include <stdint.h> |
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10 |
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Initial PSG support. Mostly works, noise channel is borked though.
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11 typedef struct { |
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12 int16_t *audio_buffer; |
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Initial PSG support. Mostly works, noise channel is borked though.
Mike Pavone <pavone@retrodev.com>
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13 int16_t *back_buffer; |
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3e1573fa22cf
Implement turbo/slow motion feature that overclocks or underclocks the entire system at the push of a button
Mike Pavone <pavone@retrodev.com>
parents:
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14 uint64_t buffer_fraction; |
3e1573fa22cf
Implement turbo/slow motion feature that overclocks or underclocks the entire system at the push of a button
Mike Pavone <pavone@retrodev.com>
parents:
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15 uint64_t buffer_inc; |
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16 uint32_t buffer_pos; |
380
1c8d74f2ab0b
Make the PSG and YM2612 use the master clock internal with an increment based on clock divider so that they stay perflectly in sync. Run both the PSG and YM2612 whenver one of them needs to be run.
Mike Pavone <pavone@retrodev.com>
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17 uint32_t clock_inc; |
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Initial PSG support. Mostly works, noise channel is borked though.
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18 uint32_t cycles; |
483
3e1573fa22cf
Implement turbo/slow motion feature that overclocks or underclocks the entire system at the push of a button
Mike Pavone <pavone@retrodev.com>
parents:
467
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changeset
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19 uint32_t sample_rate; |
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Initial PSG support. Mostly works, noise channel is borked though.
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20 uint32_t samples_frame; |
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Mike Pavone <pavone@retrodev.com>
parents:
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21 uint16_t lsfr; |
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Initial PSG support. Mostly works, noise channel is borked though.
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22 uint16_t counter_load[4]; |
15dd6418fe67
Initial PSG support. Mostly works, noise channel is borked though.
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23 uint16_t counters[4]; |
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9a5dc22297f2
Somewhat better handling of high frequency PSG tones. Needs work to fully handle case where frequency > half our output sample rate
Michael Pavone <pavone@retrodev.com>
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24 int16_t accum; |
9a5dc22297f2
Somewhat better handling of high frequency PSG tones. Needs work to fully handle case where frequency > half our output sample rate
Michael Pavone <pavone@retrodev.com>
parents:
483
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25 int16_t sample_count; |
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26 uint8_t volume[4]; |
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27 uint8_t output_state[4]; |
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28 uint8_t noise_out; |
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29 uint8_t noise_use_tone; |
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30 uint8_t noise_type; |
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31 uint8_t latch; |
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parents:
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32 } psg_context; |
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Mike Pavone <pavone@retrodev.com>
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33 |
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Initial PSG support. Mostly works, noise channel is borked though.
Mike Pavone <pavone@retrodev.com>
parents:
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changeset
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34 |
380
1c8d74f2ab0b
Make the PSG and YM2612 use the master clock internal with an increment based on clock divider so that they stay perflectly in sync. Run both the PSG and YM2612 whenver one of them needs to be run.
Mike Pavone <pavone@retrodev.com>
parents:
364
diff
changeset
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35 void psg_init(psg_context * context, uint32_t sample_rate, uint32_t master_clock, uint32_t clock_div, uint32_t samples_frame); |
483
3e1573fa22cf
Implement turbo/slow motion feature that overclocks or underclocks the entire system at the push of a button
Mike Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
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36 void psg_adjust_master_clock(psg_context * context, uint32_t master_clock); |
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37 void psg_write(psg_context * context, uint8_t value); |
15dd6418fe67
Initial PSG support. Mostly works, noise channel is borked though.
Mike Pavone <pavone@retrodev.com>
parents:
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38 void psg_run(psg_context * context, uint32_t cycles); |
15dd6418fe67
Initial PSG support. Mostly works, noise channel is borked though.
Mike Pavone <pavone@retrodev.com>
parents:
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39 |
15dd6418fe67
Initial PSG support. Mostly works, noise channel is borked though.
Mike Pavone <pavone@retrodev.com>
parents:
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40 #endif //PSG_CONTEXT_H_ |
15dd6418fe67
Initial PSG support. Mostly works, noise channel is borked though.
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
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41 |