Add 06 day code

06_day/bootpack.c

@@ -0,0 +1,81 @@
+/* bootpackのメイン */
+
+#include <stdio.h>
+
+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_screen8(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);
+void init_mouse_cursor8(char *mouse, char bc);
+void putblock8_8(char *vram, int vxsize, int pxsize,
+	int pysize, int px0, int py0, char *buf, int bxsize);
+
+#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;
+};
+
+struct SEGMENT_DESCRIPTOR {
+	short limit_low, base_low;
+	char base_mid, access_right;
+	char limit_high, base_high;
+};
+
+struct GATE_DESCRIPTOR {
+	short offset_low, selector;
+	char dw_count, access_right;
+	short offset_high;
+};
+
+void init_gdtidt(void);
+void set_segmdesc(struct SEGMENT_DESCRIPTOR *sd, unsigned int limit, int base, int ar);
+void set_gatedesc(struct GATE_DESCRIPTOR *gd, int offset, int selector, int ar);
+void load_gdtr(int limit, int addr);
+void load_idtr(int limit, int addr);
+
+void HariMain(void)
+{
+	struct BOOTINFO *binfo = (struct BOOTINFO *) 0x0ff0;
+	char s[40], mcursor[256];
+	int mx, my;
+
+	init_gdtidt();
+	init_palette();
+	init_screen8(binfo->vram, binfo->scrnx, binfo->scrny);
+	mx = (binfo->scrnx - 16) / 2; /* 画面中央になるように座標計算 */
+	my = (binfo->scrny - 28 - 16) / 2;
+	init_mouse_cursor8(mcursor, COL8_008484);
+	putblock8_8(binfo->vram, binfo->scrnx, 16, 16, mx, my, mcursor, 16);
+	sprintf(s, "(%d, %d)", mx, my);
+	putfonts8_asc(binfo->vram, binfo->scrnx, 0, 0, COL8_FFFFFF, s);
+
+	for (;;) {
+		io_hlt();
+	}
+}