ps:当然也可以直接使用 win + r 快捷键也可以，不过最好还是创建一个比较好。因为以后打开时不需要再麻烦了。
3. 打开vc code,输入以下代码并保存为 naskfunc.nas,存放在harib02d文件夹中；
; naskfunc
; TAB=4
[FORMAT "WCOFF"] ; 制作目标文件的模式
[INSTRSET "i486p"] ; 要使用486指令的语句
[BITS 32] ; 制作32位模式用的机器语言
[FILE "naskfunc.nas"] ; 原文件名信息
GLOBAL _io_hlt, _io_cli, _io_sti, _io_stihlt
GLOBAL _io_in8, _io_in16, _io_in32
GLOBAL _io_out8, _io_out16, _io_out32
GLOBAL _io_load_eflags, _io_store_eflags
[SECTION .text]
_io_hlt: ; void io_hlt(void);
HLT
RET
_io_cli: ; void io_cli(void);
CLI
RET
_io_sti: ; void io_sti(void);
STI
RET
_io_stihlt: ; void io_stihlt(void);
STI
HLT
RET
_io_in8: ; int io_in8(int port);
MOV EDX,[ESP+4] ; port
MOV EAX,0
IN AL,DX
RET
_io_in16: ; int io_in16(int port);
MOV EDX,[ESP+4] ; port
MOV EAX,0
IN AX,DX
RET
_io_in32: ; int io_in32(int port);
MOV EDX,[ESP+4] ; port
IN EAX,DX
RET
_io_out8: ; void io_out8(int port, int data);
MOV EDX,[ESP+4] ; port
MOV AL,[ESP+8] ; data
OUT DX,AL
RET
_io_out16: ; void io_out16(int port, int data);
MOV EDX,[ESP+4] ; port
MOV EAX,[ESP+8] ; data
OUT DX,AX
RET
_io_out32: ; void io_out32(int port, int data);
MOV EDX,[ESP+4] ; port
MOV EAX,[ESP+8] ; data
OUT DX,EAX
RET
_io_load_eflags: ; int io_load_eflags(void);
PUSHFD ; 指 PUSH EFLAGS
POP EAX
RET
_io_store_eflags: ; void io_store_eflags(int eflags);
MOV EAX,[ESP+4]
PUSH EAX
POPFD ; 指 POP EFLAGS
RET
打开vc code,输入以下代码并保存为 bootpack.c 存放在haribooj文件夹中。
void io_hlt(void);
void io_cli(void);
void io_out8(int port, int data);
int io_load_eflags(void);
void io_store_eflags(int eflags);
void init_palette(void);
void set_palette(int start, int end, unsigned char *rgb);
void boxfill8(unsigned char *vram, int xsize, unsigned char c, int x0, int y0, int x1, int y1);
void init_screen(char *vram, int x, int y);
void putfont8(char *vram, int xsize, int x, int y, char c, char *font);
#define COL8_000000 0#define COL8_FF0000 1#define COL8_00FF00 2#define COL8_FFFF00 3#define COL8_0000FF 4#define COL8_FF00FF 5#define COL8_00FFFF 6#define COL8_FFFFFF 7#define COL8_C6C6C6 8#define COL8_840000 9#define COL8_008400 10#define COL8_848400 11#define COL8_000084 12#define COL8_840084 13#define COL8_008484 14#define COL8_848484 15
struct BOOTINFO
{
char cyls, leds, vmode, reserve;
short scrnx, scrny;
char *vram;
};
void HariMain(void)
{
struct BOOTINFO *binfo = (struct BOOTINFO *) 0x0ff0;
static char font_A[16] = {
0x00, 0x18, 0x18, 0x18, 0x18, 0x24, 0x24, 0x24,
0x24, 0x7e, 0x42, 0x42, 0x42, 0xe7, 0x00, 0x00
};
init_palette();
init_screen(binfo->vram, binfo->scrnx, binfo->scrny);
putfont8(binfo->vram, binfo->scrnx, 10, 10, COL8_FFFFFF, font_A);
for (;;)
{
io_hlt();
}
}
void init_palette(void)
{
static unsigned char table_rgb[16 * 3] = {
0x00, 0x00, 0x00, /* 0 : 黑 */
0xff, 0x00, 0x00, /* 1 : 亮红 */
0x00, 0xff, 0x00, /* 2 : 亮绿 */
0xff, 0xff, 0x00, /* 3 : 亮黄 */
0x00, 0x00, 0xff, /* 4 ：亮蓝 */
0xff, 0x00, 0xff, /* 5 : 亮紫 */
0x00, 0x00, 0xff, /* 6 : 浅亮蓝 */
0xff, 0xff, 0xff, /* 7 ：白 */
0xc6, 0xc6, 0xc6, /* 8 : 亮灰 */
0x84, 0x00, 0x00, /* 9 : 暗红 */
0x00, 0x84, 0x00, /* 10 : 暗绿 */
0x84, 0x84, 0x00, /* 11 : 暗黄 */
0x00, 0x00, 0x84, /* 12 : 暗青 */
0x84, 0x00, 0x84, /* 13 : 暗紫 */
0x00, 0x84, 0x84, /* 14 : 浅暗蓝 */
0x84, 0x84, 0x84 /* 15 : 暗灰 */
};
set_palette(0, 15, table_rgb);
return;
/* C语言中的static char语句只能用于数据， 相当于汇编中的DB指令 */
}
void set_palette(int start, int end, unsigned char *rgb)
{
int i, eflags;
eflags = io_load_eflags(); /* 记录中断许可标志的值 */
io_cli(); /* 将中断许可标志置为0， 禁止中断 */
io_out8(0x03c8, start);
for (i = start; i <= end; i++) {
io_out8(0x03c9, rgb[0] / 4);
io_out8(0x03c9, rgb[1] / 4);
io_out8(0x03c9, rgb[2] / 4);
rgb += 3;
}
io_store_eflags(eflags); /* 复原中断许可标志 */
return;
}
void boxfill8(unsigned char *vram, int xsize, unsigned char c, int x0, int y0, int x1, int y1)
{
int x, y;
for (y = y0; y <= y1; y++) {
for (x = x0; x <= x1; x++)
vram[y * xsize + x] = c;
}
return;
}
void init_screen(char *vram, int x, int y)
{
boxfill8(vram, x, COL8_008484, 0, 0, x - 1, y - 29);
boxfill8(vram, x, COL8_C6C6C6, 0, y - 28, x - 1, y - 28);
boxfill8(vram, x, COL8_FFFFFF, 0, y - 27, x - 1, y - 27);
boxfill8(vram, x, COL8_C6C6C6, 0, y - 26, x - 1, y - 1);
boxfill8(vram, x, COL8_FFFFFF, 3, y - 24, 59, y - 24);
boxfill8(vram, x, COL8_FFFFFF, 2, y - 24, 2, y - 4);
boxfill8(vram, x, COL8_848484, 3, y - 4, 59, y - 4);
boxfill8(vram, x, COL8_848484, 59, y - 23, 59, y - 5);
boxfill8(vram, x, COL8_000000, 2, y - 3, 59, y - 3);
boxfill8(vram, x, COL8_000000, 60, y - 24, 60, y - 3);
boxfill8(vram, x, COL8_848484, x - 47, y - 24, x - 4, y - 24);
boxfill8(vram, x, COL8_848484, x - 47, y - 23, x - 47, y - 4);
boxfill8(vram, x, COL8_FFFFFF, x - 47, y - 3, x - 4, y - 3);
boxfill8(vram, x, COL8_FFFFFF, x - 3, y - 24, x - 3, y - 3);
return;
}
void putfont8(char *vram, int xsize, int x, int y, char c, char *font)
{
int i;
char *p,d; /* date */
for (i =0; i < 16; i++) {
p = vram +(y + i) * xsize + x;
d = font[i];
if ((d & 0x80) != 0) { p[0] = c; }
if ((d & 0x40) != 0) { p[1] = c; }
if ((d & 0x20) != 0) { p[2] = c; }
if ((d & 0x10) != 0) { p[3] = c; }
if ((d & 0x08) != 0) { p[4] = c; }
if ((d & 0x04) != 0) { p[5] = c; }
if ((d & 0x02) != 0) { p[6] = c; }
if ((d & 0x01) != 0) { p[7] = c; }
}
}
