먼저 어셈블리코드에서 부팅정보 가져오기
이전에 어샘해드.nas에 부트정보 표기했었는데 이걸 c에 가져와서 사용
void HariMain(void)
{
char *vram;
int xsize, ysize;
short *binfo_scrnx, *binfo_scrny;
int *binfo_vram;
init_palette();
binfo_scrnx = (short *)0x0ff4;
binfo_scrny = (short *)0x0ff6;
binfo_vram = (int *)0x0ff8;
vram = (char *) *binfo_vram;
xsize = *binfo_scrnx;
ysize = *binfo_scrny;
구조체 사용해서 부트인포 정리
struct BOOTINFO {
char cyls, leds, vmode, reserve;
short scrnx, scrny;
char *vram;
};
void HariMain(void)
{
char *vram;
int xsize, ysize;
struct BOOTINFO *binfo;
init_palette();
binfo = (struct BOOTINFO *) 0x0ff0;
xsize = (*binfo).scrnx;
ysize = (*binfo).scrny;
vram = (*binfo).vram;
화살표 연산자로 수정
void io_hlt(void);
void io_cli(void);
void io_out8(int prot, 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);
#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;
init_palette();
init_screen(binfo->vram, binfo->scrnx, binfo->scrny);
for(;;)
{
io_hlt();
}
}
void init_palette(void)
{
static unsigned char table_rgb[16 * 3] = {
0x00, 0x00, 0x00,
0xff, 0x00, 0x00,
0x00, 0xff, 0x00,
0xff, 0xff, 0x00,
0x00, 0x00, 0xff,
0xff, 0x00, 0xff,
0x00, 0xff, 0xff,
0xff, 0xff, 0xff,
0xc6, 0xc6, 0xc6,
0x84, 0x00, 0x00,
0x00, 0x84, 0x00,
0x84, 0x84, 0x00,
0x00, 0x00, 0x84,
0x84, 0x00, 0x84,
0x00, 0x84, 0x84,
0x84, 0x84, 0x84
};
set_palette(0, 15, table_rgb);
return;
}
void set_palette(int start, int end, unsigned char *rgb)
{
int i, eflags;
eflags = io_load_eflags(); // 인터럽트 허가 플래그 값 가져옴
io_cli(); // 허가 플래그를 0으로 하여 인터럽트 금지
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); // 인터럽트 허가 플래그를 본래 값으로 되돌림.
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;
}
글자 쓰기
putchar8로 폰트데이터 드로잉 구현
void io_hlt(void);
void io_cli(void);
void io_out8(int prot, 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,
0xff, 0x00, 0x00,
0x00, 0xff, 0x00,
0xff, 0xff, 0x00,
0x00, 0x00, 0xff,
0xff, 0x00, 0xff,
0x00, 0xff, 0xff,
0xff, 0xff, 0xff,
0xc6, 0xc6, 0xc6,
0x84, 0x00, 0x00,
0x00, 0x84, 0x00,
0x84, 0x84, 0x00,
0x00, 0x00, 0x84,
0x84, 0x00, 0x84,
0x00, 0x84, 0x84,
0x84, 0x84, 0x84
};
set_palette(0, 15, table_rgb);
return;
}
void set_palette(int start, int end, unsigned char *rgb)
{
int i, eflags;
eflags = io_load_eflags(); // 인터럽트 허가 플래그 값 가져옴
io_cli(); // 허가 플래그를 0으로 하여 인터럽트 금지
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); // 인터럽트 허가 플래그를 본래 값으로 되돌림.
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;
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;}
}
}
폰트 데이터 가져와 사용하기
위 예제에선 폰트 A 데이터를 직접 그려서 썻으나
아래 택스트 파일을 바이너리 이미지로 만들어 bootpack.obj와 합쳐서 사용함.
void HariMain(void)
{
struct BOOTINFO *binfo = (struct BOOTINFO *) 0x0ff0;
extern char hankaku[4096];
init_palette();
init_screen(binfo->vram, binfo->scrnx, binfo->scrny);
putfont8(binfo->vram, binfo->scrnx, 8, 8, COL8_FFFFFF, hankaku + 'A' * 16);
putfont8(binfo->vram, binfo->scrnx, 16, 8, COL8_FFFFFF, hankaku + 'B' * 16);
putfont8(binfo->vram, binfo->scrnx, 24, 8, COL8_FFFFFF, hankaku + 'C' * 16);
putfont8(binfo->vram, binfo->scrnx, 40, 8, COL8_FFFFFF, hankaku + '1' * 16);
putfont8(binfo->vram, binfo->scrnx, 48, 8, COL8_FFFFFF, hankaku + '2' * 16);
putfont8(binfo->vram, binfo->scrnx, 56, 8, COL8_FFFFFF, hankaku + '3' * 16);
for(;;)
{
io_hlt();
}
}
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