-first

Author: JalorOo

.t1.asm.un~

@@ -0,0 +1,87 @@
+assume cs:code,ds:data,ss:stack
+
+data segment
+
+	db 128 dup(0)
+
+data ends
+
+stack segment stack
+
+	db 128 dup(0)
+
+stack ends
+
+code segment
+
+start:	mov ax,stack
+		mov ss,ax
+		mov sp,128;initial stack
+		
+		call cpy_new_int0
+		call set_new_int0
+		
+		int 0
+		
+		mov ax,4c00h
+		int 21h
+;=============change the int 0 cs:ip================
+set_new_int0:
+				
+				mov bx,0
+				mov es,bx
+				
+				cli
+				mov word ptr es:[0*4],7e00h
+				mov word ptr es:[0*4+2],0
+				sti
+				ret
+;===================keyboard interupt===============
+new_int0:		
+				push bx
+				push cx
+				push dx
+				push es
+				
+				mov bx,0b800h
+				mov es,bx
+				
+				mov bx,0
+				mov cx,2000
+				mov dl,'!'
+				
+show_asc:		mov es:[bx],dl
+				add bx,2
+				loop show_asc
+				
+				pop es
+				pop dx
+				pop cx
+				pop bx
+				iret
+				
+new_int0_end:	nop
+		
+;===============modified int 0===================
+cpy_new_int0:	
+				mov bx,cs
+				mov ds,bx
+				mov si,offset new_int0;set source
+				
+				mov bx,0
+				mov es,bx
+				mov di,7e00h;set determination--which can save code securily
+				
+				mov cx,offset new_int0_end - new_int0
+				cld
+				rep movsb;cpy the code
+				
+				ret
+		
+;==================================
+show_char:	
+			ret
+
+code ends
+
+end start

.t2.asm.un~

@@ -0,0 +1,89 @@
+assume cs:code,ss:stack,ds:data
+
+data segment
+	db 128 dup(0)
+data ends
+
+stack segment
+	db 128 dup(0)
+stack ends
+
+code segment
+
+start:	
+		mov ax,stack
+		mov ss,ax
+		mov sp,128
+		
+		call clean_screen
+		
+		call init_reg
+time:	
+		mov al,9; 读取年
+		mov di,160*10 + 25*2
+		call show
+		mov al,8; 读取月
+		mov di,160*10 + 28*2
+		call show
+		mov al,7; 读取日
+		mov di,160*10 + 31*2
+		call show
+		mov al,4; 读取时
+		mov di,160*10 + 34*2
+		call show
+		mov al,2; 读取分
+		mov di,160*10 + 37*2
+		call show
+		mov al,0; 读取秒
+		mov di,160*10 + 40*2
+		call show
+		jmp time
+		
+		mov ax,4c00h
+		int 21h
+;================================	
+clean_screen:
+					mov bx,0B800H;
+					mov es,bx
+					mov bx,0
+					
+					mov dx,0700H ;空字符串
+					mov cx,2000
+					
+					
+clearScreen:		mov es:[bx],dx
+					add bx,2
+					
+					loop clearScreen
+					
+					ret
+		
+;=================================
+init_reg:
+		mov bx,0b800h
+		mov es,bx
+		
+		ret
+		
+;=================================
+show:
+		out 70h,al
+		in al,71h
+		
+		mov ah,al
+		mov cl,4
+		shr ah,cl
+		and al,00001111b
+		
+		add ah,30h
+		add al,30h
+		
+		mov es:[di],ah
+		mov es:[di+2],al
+		
+		ret
+
+code ends
+
+end start
+

.t2.un~

@@ -0,0 +1,29 @@
+assume cs:code
+
+data segment
+	dw 0,0,0,0
+	dw 0,0,0,0
+data ends
+
+code segment
+	start:	mov ax,data
+			mov ss,ax
+			mov sp,16
+			
+			mov word ptr ss:[0],OFFSET s
+			mov ss:[2],cs
+			
+			call dword ptr ss:[0]
+			
+	s1:     nop
+	s:		mov ax,OFFSET s
+			sub ax,ss:[0CH]
+			
+			mov bx,cs
+			sub bx,ss:[0EH]
+			
+			mov ax,4C00H
+			int 21H
+code ends
+
+end start

.t3.asm.un~

@@ -0,0 +1,80 @@
+assume cs:code,ds:data,ss:stack
+
+;编程：在屏幕中间分别显示 绿色、绿底红色、白底蓝色的字符串‘welcome to masm!’
+data segment
+	   ;0123456789ABCDEF
+	db 'welcome to masm!'
+	   ;0000 0000
+	   ; rgb  rgb
+	db  00000010B
+	db	00100100B
+	db  01110001B
+data ends
+
+stack segment stack
+	db 128 dup(0)
+stack ends
+
+code segment
+
+start: 	    
+			mov ax,stack ;设置栈段
+			mov ss,ax
+			mov sp,128
+			
+			call setup
+
+			call setShow
+			
+			mov ax,4C00H
+			int 21H
+
+;====================================================
+
+setup:		
+			mov ax,data ;设置数据段
+			mov ds,ax
+			
+			mov ax,0B800H
+			mov es,ax ;设置显示段
+			
+			ret
+;====================================================			
+			
+setShow:	mov cx,3 ;循环行
+			
+			mov bx,16;指向颜色
+			mov di,160*10+30*2 ;显示字符的位置
+			mov si,0 ;读取字符
+			
+showline:	push cx
+			push di
+			push si
+			mov ah,ds:[bx]
+			mov cx,16
+			
+showNumber:	
+			
+			mov al,ds:[si]
+
+			
+			mov es:[di],ax
+			
+			inc si
+			add di,2
+			
+			loop showNumber
+			
+			inc bx;换颜色
+			pop si ;字符读取开头
+			pop di
+			add di,160 ;换行
+			pop cx
+			
+			loop showline
+
+			ret
+
+code ends
+
+end start