使用箭头方法

05_day/bootpack.c

@@ -26,22 +26,18 @@ void init_screen(char *vram, int x, int y);
 #define COL8_008484		14
 #define COL8_848484		15
 
+struct BOOTINFO {
+	char cyls, leds, vmode, reserve;
+	short scrnx, scrny;
+	char *vram;
+};
+
 void HariMain(void)
 {
-	char *vram;/* 声明变量vram、用于BYTE [...]地址 */
-	int xsize, ysize;
-	short *binfo_scrnx, *binfo_scrny;
-	int *binfo_vram;
+	struct BOOTINFO *binfo = (struct BOOTINFO *) 0x0ff0;
 
 	init_palette();
-	binfo_scrnx = (short *) 0x0ff4;
-	binfo_scrny = (short *) 0x0ff6;
-	binfo_vram = (int *) 0x0ff8;
-	xsize = *binfo_scrnx;
-	ysize = *binfo_scrny;
-	vram = (char *) *binfo_vram;
-
-	init_screen(vram, xsize, ysize);
+	init_screen(binfo->vram, binfo->scrnx, binfo->scrny);
 
 	for (;;) {
 		io_hlt();