初始化PIC

06_day/Makefile

@@ -1,3 +1,6 @@
+OBJS_BOOTPACK = bootpack.obj naskfunc.obj hankaku.obj graphic.obj dsctbl.obj \
+		int.obj
+
 TOOLPATH = ../z_tools/
 INCPATH  = ../z_tools/haribote/
 
@@ -28,45 +31,15 @@ ipl10.bin : ipl10.nas Makefile
 asmhead.bin : asmhead.nas Makefile
 	$(NASK) asmhead.nas asmhead.bin asmhead.lst
 
-bootpack.gas : bootpack.c Makefile
-	$(CC1) -o bootpack.gas bootpack.c
-
-bootpack.nas : bootpack.gas Makefile
-	$(GAS2NASK) bootpack.gas bootpack.nas
-
-bootpack.obj : bootpack.nas Makefile
-	$(NASK) bootpack.nas bootpack.obj bootpack.lst
-
-naskfunc.obj : naskfunc.nas Makefile
-	$(NASK) naskfunc.nas naskfunc.obj naskfunc.lst
-
 hankaku.bin : hankaku.txt Makefile
 	$(MAKEFONT) hankaku.txt hankaku.bin
 
 hankaku.obj : hankaku.bin Makefile
 	$(BIN2OBJ) hankaku.bin hankaku.obj _hankaku
 
-graphic.gas : graphic.c Makefile
-	$(CC1) -o graphic.gas graphic.c
-
-graphic.nas : graphic.gas Makefile
-	$(GAS2NASK) graphic.gas graphic.nas
-
-graphic.obj : graphic.nas Makefile
-	$(NASK) graphic.nas graphic.obj graphic.lst
-
-dsctbl.gas : dsctbl.c Makefile
-	$(CC1) -o dsctbl.gas dsctbl.c
-
-dsctbl.nas : dsctbl.gas Makefile
-	$(GAS2NASK) dsctbl.gas dsctbl.nas
-
-dsctbl.obj : dsctbl.nas Makefile
-	$(NASK) dsctbl.nas dsctbl.obj dsctbl.lst
-
-bootpack.bim : bootpack.obj naskfunc.obj hankaku.obj graphic.obj dsctbl.obj Makefile
+bootpack.bim : $(OBJS_BOOTPACK) Makefile
 	$(OBJ2BIM) @$(RULEFILE) out:bootpack.bim stack:3136k map:bootpack.map \
-		bootpack.obj naskfunc.obj hankaku.obj graphic.obj dsctbl.obj
+		$(OBJS_BOOTPACK)
 # 3MB+64KB=3136KB
 
 bootpack.hrb : bootpack.bim Makefile
@@ -83,6 +56,17 @@ haribote.img : ipl10.bin haribote.sys Makefile
 
 # 其他指令
 
+%.gas : %.c Makefile
+	$(CC1) -o $*.gas $*.c
+
+%.nas : %.gas Makefile
+	$(GAS2NASK) $*.gas $*.nas
+
+%.obj : %.nas Makefile
+	$(NASK) $*.nas $*.obj $*.lst
+
+# 运行程序
+
 img :
 	$(MAKE) haribote.img
 
@@ -98,11 +82,7 @@ install :
 clean :
 	-$(DEL) *.bin
 	-$(DEL) *.lst
-	-$(DEL) *.gas
 	-$(DEL) *.obj
-	-$(DEL) bootpack.nas
-	-$(DEL) graphic.nas
-	-$(DEL) dsctbl.nas
 	-$(DEL) bootpack.map
 	-$(DEL) bootpack.bim
 	-$(DEL) bootpack.hrb

06_day/bootpack.c

@@ -1,74 +1,19 @@
 /* bootpack */
 
+#include "bootpack.h"
 #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;
+	struct BOOTINFO *binfo = (struct BOOTINFO *) ADR_BOOTINFO;
 	char s[40], mcursor[256];
 	int mx, my;
 
 	init_gdtidt();
+	init_pic();
+	
 	init_palette();
 	init_screen8(binfo->vram, binfo->scrnx, binfo->scrny);
-	
 	mx = (binfo->scrnx - 16) / 2; /* 计算画面的中心坐标*/
 	my = (binfo->scrny - 28 - 16) / 2;
 	init_mouse_cursor8(mcursor, COL8_008484);
@@ -79,4 +24,4 @@ void HariMain(void)
 	for (;;) {
 		io_hlt();
 	}
-}
+}

06_day/bootpack.h

@@ -0,0 +1,84 @@
+/* asmhead.nas */
+struct BOOTINFO { /* 0x0ff0-0x0fff */
+	char cyls; /* 启动区读磁盘读到此为止 */
+	char leds; /* 启动时键盘的LED的状态 */
+	char vmode; /* 显卡模式为多少位彩色 */
+	char reserve;
+	short scrnx, scrny; /* 画面分辨率 */
+	char *vram;
+};
+#define ADR_BOOTINFO	0x00000ff0
+
+/* naskfunc.nas */
+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 load_gdtr(int limit, int addr);
+void load_idtr(int limit, int addr);
+
+/* graphic.c */
+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
+
+/* dsctbl.c */
+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);
+#define ADR_IDT			0x0026f800
+#define LIMIT_IDT		0x000007ff
+#define ADR_GDT			0x00270000
+#define LIMIT_GDT		0x0000ffff
+#define ADR_BOTPAK		0x00280000
+#define LIMIT_BOTPAK	0x0007ffff
+#define AR_DATA32_RW	0x4092
+#define AR_CODE32_ER	0x409a
+
+/* int.c */
+void init_pic(void);
+#define PIC0_ICW1		0x0020
+#define PIC0_OCW2		0x0020
+#define PIC0_IMR		0x0021
+#define PIC0_ICW2		0x0021
+#define PIC0_ICW3		0x0021
+#define PIC0_ICW4		0x0021
+#define PIC1_ICW1		0x00a0
+#define PIC1_OCW2		0x00a0
+#define PIC1_IMR		0x00a1
+#define PIC1_ICW2		0x00a1
+#define PIC1_ICW3		0x00a1
+#define PIC1_ICW4		0x00a1

06_day/dsctbl.c

@@ -1,42 +1,26 @@
 /* GDT、IDT、descriptor table 关系处理 */
 
-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);
+#include "bootpack.h"
 
 void init_gdtidt(void)
 {
-	struct SEGMENT_DESCRIPTOR *gdt = (struct SEGMENT_DESCRIPTOR *) 0x00270000;
-	struct GATE_DESCRIPTOR    *idt = (struct GATE_DESCRIPTOR    *) 0x0026f800;
+	struct SEGMENT_DESCRIPTOR *gdt = (struct SEGMENT_DESCRIPTOR *) ADR_GDT;
+	struct GATE_DESCRIPTOR    *idt = (struct GATE_DESCRIPTOR    *) ADR_IDT;
 	int i;
 
 	/* GDT初始化 */
 	for (i = 0; i < 8192; i++) {
 		set_segmdesc(gdt + i, 0, 0, 0);
 	}
-	set_segmdesc(gdt + 1, 0xffffffff, 0x00000000, 0x4092);
-	set_segmdesc(gdt + 2, 0x0007ffff, 0x00280000, 0x409a);
-	load_gdtr(0xffff, 0x00270000);
+	set_segmdesc(gdt + 1, 0xffffffff,   0x00000000, AR_DATA32_RW);
+	set_segmdesc(gdt + 2, LIMIT_BOTPAK, ADR_BOTPAK, AR_CODE32_ER);
+	load_gdtr(LIMIT_GDT, ADR_GDT);
 
 	/* IDT初始化 */
 	for (i = 0; i < 256; i++) {
 		set_gatedesc(idt + i, 0, 0, 0);
 	}
-	load_idtr(0x7ff, 0x0026f800);
+	load_idtr(LIMIT_IDT, ADR_IDT);
 
 	return;
 }

06_day/graphic.c

@@ -1,37 +1,6 @@
 /* 关于绘图部分的处理 */
 
-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
+#include "bootpack.h"
 
 void init_palette(void)
 {

06_day/int.c

@@ -0,0 +1,25 @@
+/*初始化关系 */
+
+#include "bootpack.h"
+
+void init_pic(void)
+/* PIC初始化 */
+{
+	io_out8(PIC0_IMR,  0xff  ); /* 禁止所有中断 */
+	io_out8(PIC1_IMR,  0xff  ); /* 禁止所有中断 */
+
+	io_out8(PIC0_ICW1, 0x11  ); /* 边缘触发模式（edge trigger mode） */
+	io_out8(PIC0_ICW2, 0x20  ); /* IRQ0-7由INT20-27接收 */
+	io_out8(PIC0_ICW3, 1 << 2); /* PIC1由IRQ2相连 */
+	io_out8(PIC0_ICW4, 0x01  ); /* 无缓冲区模式 */
+
+	io_out8(PIC1_ICW1, 0x11  ); /* 边缘触发模式（edge trigger mode） */
+	io_out8(PIC1_ICW2, 0x28  ); /* IRQ8-15由INT28-2f接收 */
+	io_out8(PIC1_ICW3, 2     ); /* PIC1由IRQ2连接 */
+	io_out8(PIC1_ICW4, 0x01  ); /* 无缓冲区模式 */
+
+	io_out8(PIC0_IMR,  0xfb  ); /* 11111011 PIC1以外全部禁止 */
+	io_out8(PIC1_IMR,  0xff  ); /* 11111111 禁止所有中断 */
+
+	return;
+}