mirror of
https://github.com/yourtion/30dayMakeOS.git
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70 lines
2.1 KiB
C
70 lines
2.1 KiB
C
/* asmhead.nas */
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struct BOOTINFO { /* 0x0ff0-0x0fff */
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char cyls; /* 启动区读磁盘读到此为止 */
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char leds; /* 启动时键盘的LED的状态 */
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char vmode; /* 显卡模式为多少位彩色 */
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char reserve;
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short scrnx, scrny; /* 画面分辨率 */
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char *vram;
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};
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#define ADR_BOOTINFO 0x00000ff0
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/* naskfunc.nas */
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void io_hlt(void);
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void io_cli(void);
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void io_out8(int port, int data);
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int io_load_eflags(void);
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void io_store_eflags(int eflags);
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void load_gdtr(int limit, int addr);
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void load_idtr(int limit, int addr);
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/* graphic.c */
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void init_palette(void);
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void set_palette(int start, int end, unsigned char *rgb);
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void boxfill8(unsigned char *vram, int xsize, unsigned char c, int x0, int y0, int x1, int y1);
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void init_screen8(char *vram, int x, int y);
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void putfont8(char *vram, int xsize, int x, int y, char c, char *font);
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void putfonts8_asc(char *vram, int xsize, int x, int y, char c, unsigned char *s);
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void init_mouse_cursor8(char *mouse, char bc);
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void putblock8_8(char *vram, int vxsize, int pxsize,
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int pysize, int px0, int py0, char *buf, int bxsize);
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#define COL8_000000 0
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#define COL8_FF0000 1
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#define COL8_00FF00 2
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#define COL8_FFFF00 3
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#define COL8_0000FF 4
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#define COL8_FF00FF 5
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#define COL8_00FFFF 6
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#define COL8_FFFFFF 7
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#define COL8_C6C6C6 8
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#define COL8_840000 9
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#define COL8_008400 10
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#define COL8_848400 11
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#define COL8_000084 12
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#define COL8_840084 13
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#define COL8_008484 14
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#define COL8_848484 15
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/* dsctbl.c */
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struct SEGMENT_DESCRIPTOR {
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short limit_low, base_low;
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char base_mid, access_right;
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char limit_high, base_high;
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};
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struct GATE_DESCRIPTOR {
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short offset_low, selector;
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char dw_count, access_right;
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short offset_high;
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};
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void init_gdtidt(void);
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void set_segmdesc(struct SEGMENT_DESCRIPTOR *sd, unsigned int limit, int base, int ar);
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void set_gatedesc(struct GATE_DESCRIPTOR *gd, int offset, int selector, int ar);
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#define ADR_IDT 0x0026f800
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#define LIMIT_IDT 0x000007ff
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#define ADR_GDT 0x00270000
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#define LIMIT_GDT 0x0000ffff
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#define ADR_BOTPAK 0x00280000
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#define LIMIT_BOTPAK 0x0007ffff
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#define AR_DATA32_RW 0x4092
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#define AR_CODE32_ER 0x409a
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