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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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children cc39629e8d06
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287:fb840e0a48cd 288:a8ee7934a1f8
1 #ifndef YM2612_H_
2 #define YM2612_H_
3
4 #include <stdint.h>
5
6 #define NUM_SHARED_REGS (0x30-0x21)
7 #define NUM_PART_REGS (0xB7-0x30)
8
9 typedef struct {
10 uint32_t current_cycle;
11 uint32_t write_cycle;
12 uint8_t *selected_reg;
13 uint16_t timer_a;
14 uint8_t timer_b;
15 uint8_t reg_num;
16 uint8_t status;
17 uint8_t part1_regs[NUM_SHARED_REGS+NUM_PART_REGS];
18 uint8_t part2_regs[NUM_PART_REGS];
19 } ym2612_context;
20
21 void ym_init(ym2612_context * context);
22 void ym_run(ym2612_context * context, uint32_t to_cycle);
23 void ym_address_write_part1(ym2612_context * context, uint8_t address);
24 void ym_address_write_part2(ym2612_context * context, uint8_t address);
25 void ym_data_write(ym2612_context * context, uint8_t value);
26 uint8_t ym_read_status(ym2612_context * context);
27
28 #endif //YM2612_H_
29