显示变量

05_day/bootpack.c

@@ -1,3 +1,5 @@
+#include <stdio.h>
+
 void io_hlt(void);
 void io_cli(void);
 void io_out8(int port, int data);
@@ -9,6 +11,8 @@ 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);
+void putfonts8_asc(char *vram, int xsize, int x, int y, char c, unsigned char *s);
+
 
 #define COL8_000000		0
 #define COL8_FF0000		1
@@ -36,16 +40,17 @@ struct BOOTINFO {
 void HariMain(void)
 {
 	struct BOOTINFO *binfo = (struct BOOTINFO *) 0x0ff0;
-	extern char hankaku[4096];
+	char s[40];
 
 	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);
+
+	putfonts8_asc(binfo->vram, binfo->scrnx,  8,  8, COL8_FFFFFF, "ABC 123");
+	putfonts8_asc(binfo->vram, binfo->scrnx, 31, 31, COL8_000000, "Haribote OS.");
+	putfonts8_asc(binfo->vram, binfo->scrnx, 30, 30, COL8_FFFFFF, "Haribote OS.");
+
+	sprintf(s, "scrnx = %d", binfo->scrnx);
+	putfonts8_asc(binfo->vram, binfo->scrnx, 16, 64, COL8_FFFFFF, s);
 
 	for (;;) {
 		io_hlt();
@@ -142,4 +147,15 @@ void putfont8(char *vram, int xsize, int x, int y, char c, char *font)
 		if ((d & 0x01) != 0) { p[7] = c; }
 	}
 	return;
+}
+
+void putfonts8_asc(char *vram, int xsize, int x, int y, char c, unsigned char *s)
+{
+	extern char hankaku[4096];
+	/* C语言中，字符串都是以0x00结尾 */
+	for (; *s != 0x00; s++) {
+		putfont8(vram, xsize, x, y, c, hankaku + *s * 16);
+		x += 8;
+	}
+	return;
 }