144 lines
4.1 KiB
C
144 lines
4.1 KiB
C
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#ifndef __NES_PPU_H
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#define __NES_PPU_H
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#include "nes_main.h"
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//////////////////////////////////////////////////////////////////////////////////
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//本程序移植自网友ye781205的NES模拟器工程
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//ALIENTEK STM32F407开发板
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//NES APU 驱动代码
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//正点原子@ALIENTEK
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//技术论坛:www.openedv.com
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//创建日期:2014/7/1
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//版本：V1.0
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//////////////////////////////////////////////////////////////////////////////////
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#undef NULL
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#define NULL 0
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#ifndef TRUE
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#define TRUE 1
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#endif
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#ifndef FALSE
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#define FALSE 0
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#endif
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static const unsigned int NES_Palette[64]=
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{
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0x73AE,0x20D1,0x0015,0x4013,0x880E,0xA802,0xA000,0x7840,
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0x4160,0x0220,0x0280,0x01E2,0x19EB,0x0000,0x0000,0x0000,
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0xBDF7,0x039D,0x21DD,0x801E,0xB817,0xE00B,0xD940,0xCA61,
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0x8B80,0x04A0,0x0540,0x0487,0x0411,0x0000,0x0000,0x0000,
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0xF79E,0x3DFF,0x5CBF,0xA45F,0xF3DF,0xFBB6,0xFBAC,0xFCC7,
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0xF5E7,0x8682,0x4EE9,0x5FD3,0x075B,0x0000,0x0000,0x0000,
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0xF79E,0xAF3F,0xC6BF,0xD65F,0xFE3F,0xFE3B,0xFDF6,0xFED5,
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0xFF34,0xE7F4,0xAF97,0xB7F9,0x9FFE,0x0000,0x0000,0x0000
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};
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/*
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static unsigned int NES_Palette[64]=
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{
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0x73AE,0x20D1,0x0015,0x4013,0x880E,0xA802,0xA000,0x7840,
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0x4160,0x0220,0x0280,0x01E2,0x19EB,0x0000,0x0000,0x0000,
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0xBDF7,0x039D,0x21DD,0x801E,0xB817,0xE00B,0xD940,0xCA61,
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0x8B80,0x04A0,0x0540,0x0487,0x0411,0x0000,0x0000,0x0000,
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0xF79E,0x3DFF,0x5CBF,0xA45F,0xF3DF,0xFBB6,0xFBAC,0xFCC7,
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0xF5E7,0x8682,0x4EE9,0x5FD3,0x075B,0x0000,0x0000,0x0000,
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0xF79E,0xAF3F,0xC6BF,0xD65F,0xFE3F,0xFE3B,0xFDF6,0xFED5,
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0xFF34,0xE7F4,0xAF97,0xB7F9,0x9FFE,0x0000,0x0000,0x0000
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};
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*/
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extern u8* VROM_banks; //VROM开始地址 图案表*************************************
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extern u8* VROM_tiles;
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extern uint8* PPU_VRAM_banks[12];
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extern uint8* PPU_tile_banks[8];
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extern uint8* PPU_patterntables; //8192//VROM开始地址 图案表*************************************
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extern uint8* spr_ram; //sprite ram
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enum
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{
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NES_SCREEN_WIDTH = 256,
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NES_SCREEN_HEIGHT = 240,
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SIDE_MARGIN = 8,
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NES_SCREEN_WIDTH_VIEWABLE = NES_SCREEN_WIDTH,
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NES_BACKBUF_WIDTH = NES_SCREEN_WIDTH + (2*SIDE_MARGIN)
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};
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enum
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{
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BG_WRITTEN_FLAG = 0x01,
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SPR_WRITTEN_FLAG = 0x02
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};
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typedef struct
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{
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uint32 in_vblank;
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uint32 current_frame_line;
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uint16 bg_pattern_table_addr;
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uint16 spr_pattern_table_addr;
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uint16 ppu_addr_inc;
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uint16 loopy_v; // vram address -- used for reading/writing through $2007
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// see loopy-2005.txt
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uint16 loopy_t; // temp vram address
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uint8 loopy_x; // 3-bit subtile x-offset
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uint8 toggle_2005_2006;
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uint8 spr_ram_rw_ptr; // sprite ram read/write pointer内存读/写指针
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uint8 read_2007_buffer;
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uint8 LowRegs[0x08];
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uint8 bg_pal[0x10]; //extern BYTE BGPal[0x20]; //背景调色板
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uint8 spr_pal[0x10]; //extern BYTE SPPal[0x20]; //精灵调色板
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uint8 PPU_nametables[4*0x400]; //4096 PPU真正的的RAM
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// Rick
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uint8* PPU_VRAM_banks[12];
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uint8* PPU_tile_banks[8];
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uint8* PPU_tile_tables;
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uint8 solid_buf[NES_BACKBUF_WIDTH]; // 当前像素的位标志线
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uint8 dummy_buffer[NES_BACKBUF_WIDTH]; // used to do sprite 0 hit detection when we aren't supposed to draw
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} ppu_data;
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extern ppu_data *ppu;
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extern u8 *spr_ram;
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uint32 spr_enabled(void);
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uint32 bg_enabled(void);
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void set_name_table(uint8 bank, int bank_num);
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void set_tile_bank(int i, uint8 *bank);
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void compile(int count, uint8 *src, uint8 *dest);
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void set_tile_banks(uint8 *bank0, uint8 *bank1, uint8 *bank2, uint8 *bank3,
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uint8 *bank4, uint8 *bank5, uint8 *bank6, uint8 *bank7);
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void PPU_reset(void *lcd_addr);
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void PPU_start_frame(void);
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void set_mirroring(uint32 nt0, uint32 nt1, uint32 nt2, uint32 nt3);//设置垂直水平镜像
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uint8 ReadLowRegs(uint32 addr);
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void WriteLowRegs(uint32 addr, uint8 data);
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void scanline_draw(int LineNo);
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void do_scanline_and_draw(uint8* buf);
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// Rick
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void start_frame(uint8 *buf, int ypitch);
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void end_frame(uint8 *buf);
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void do_scanline_and_dont_draw(int LineNo);
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uint32 NMI_enabled(void);
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void start_vblank(void);
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void end_vblank(void);
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void render_bg(uint8* buf);
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void render_spr(uint8* buf);
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void update_tile(int byteOffset, uint8 data);
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#endif
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