mirror of
https://github.com/ekeeke/Genesis-Plus-GX.git
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75 lines
1.8 KiB
C
75 lines
1.8 KiB
C
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#ifndef _SYSTEM_H_
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#define _SYSTEM_H_
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typedef struct
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{
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uint8 *data; /* Bitmap data */
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int width; /* Bitmap width (32+512+32) */
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int height; /* Bitmap height (256) */
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int depth; /* Color depth (8 bits) */
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int pitch; /* Width of bitmap in bytes */
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int granularity; /* Size of each pixel in bytes */
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int remap; /* 1= Translate pixel data */
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struct
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{
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int x; /* X offset of viewport within bitmap */
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int y; /* Y offset of viewport within bitmap */
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int w; /* Width of viewport */
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int h; /* Height of viewport */
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int ow; /* Previous width of viewport */
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int oh; /* Previous height of viewport */
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int changed; /* 1= Viewport width or height have changed */
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} viewport;
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} t_bitmap;
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typedef struct
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{
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int sample_rate; /* Sample rate (8000-44100) */
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int enabled; /* 1= sound emulation is enabled */
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int buffer_size; /* Size of sound buffer (in bytes) */
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int16 *buffer[2]; /* Signed 16-bit stereo sound data */
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struct
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{
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int curStage;
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int lastStage;
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int *gens_buffer[2];
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int16 *buffer[2];
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} fm;
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struct
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{
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int curStage;
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int lastStage;
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int16 *buffer;
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} psg;
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} t_snd;
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/* Global variables */
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extern t_bitmap bitmap;
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extern t_snd snd;
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extern uint8 initialized;
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extern uint32 aim_m68k;
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extern uint32 count_m68k;
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extern uint32 dma_m68k;
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extern uint32 aim_z80;
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extern uint32 count_z80;
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extern uint16 misc68Kcycles;
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extern uint16 miscZ80cycles;
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extern uint16 lines_per_frame;
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extern double CPU_Clock;
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/* Function prototypes */
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void system_init (void);
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void system_reset (void);
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void system_shutdown (void);
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int system_frame(int skip);
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void m68k_run (int cyc);
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void z80_run (int cyc);
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void m68k_freeze(int cycles);
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int audio_init (int rate);
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void audio_update (void);
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#endif /* _SYSTEM_H_ */
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