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Add a YM2612 stub implementation with just timers and status registers so that games that depend on it can run.
author Mike Pavone <pavone@retrodev.com>
date Sun, 05 May 2013 22:56:42 -0700
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a8ee7934a1f8 Add a YM2612 stub implementation with just timers and status registers so that games that depend on it can run.
Mike Pavone <pavone@retrodev.com>
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1 #ifndef YM2612_H_
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2 #define YM2612_H_
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a8ee7934a1f8 Add a YM2612 stub implementation with just timers and status registers so that games that depend on it can run.
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4 #include <stdint.h>
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5
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6 #define NUM_SHARED_REGS (0x30-0x21)
a8ee7934a1f8 Add a YM2612 stub implementation with just timers and status registers so that games that depend on it can run.
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7 #define NUM_PART_REGS (0xB7-0x30)
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8
a8ee7934a1f8 Add a YM2612 stub implementation with just timers and status registers so that games that depend on it can run.
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9 typedef struct {
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10 uint32_t current_cycle;
a8ee7934a1f8 Add a YM2612 stub implementation with just timers and status registers so that games that depend on it can run.
Mike Pavone <pavone@retrodev.com>
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11 uint32_t write_cycle;
a8ee7934a1f8 Add a YM2612 stub implementation with just timers and status registers so that games that depend on it can run.
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12 uint8_t *selected_reg;
a8ee7934a1f8 Add a YM2612 stub implementation with just timers and status registers so that games that depend on it can run.
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13 uint16_t timer_a;
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14 uint8_t timer_b;
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15 uint8_t reg_num;
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16 uint8_t status;
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17 uint8_t part1_regs[NUM_SHARED_REGS+NUM_PART_REGS];
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18 uint8_t part2_regs[NUM_PART_REGS];
a8ee7934a1f8 Add a YM2612 stub implementation with just timers and status registers so that games that depend on it can run.
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19 } ym2612_context;
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21 void ym_init(ym2612_context * context);
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22 void ym_run(ym2612_context * context, uint32_t to_cycle);
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23 void ym_address_write_part1(ym2612_context * context, uint8_t address);
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24 void ym_address_write_part2(ym2612_context * context, uint8_t address);
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25 void ym_data_write(ym2612_context * context, uint8_t value);
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26 uint8_t ym_read_status(ym2612_context * context);
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28 #endif //YM2612_H_
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