interfaces. They need to point to different routines and return different results.Therefore, their respective QueryInterface routines (queryinterfacecf and queryinterfacemc) are directed by different virtual function tables.Similarly, addref and release must be customized by different interfaces that support them.
Type Library:Every COM interface obtains information from the system registry. The definitions of these interfaces are described by an Interface Definition
OnWindowFocusChanged, assembly language
OnWindowFocusChanged refers to the call when the Activity gets or loses focus.
That is to say, if you want to load an Activity, you can use this to trigger anything !!!
Package com. app. android05; import android. app. activity; import android. OS. bundle; public class MainActivity extends Activity {@ Overrideprotected void onCreate (Bundle savedInstanceState) {sup
X86 assembly language-Summary of learning from the real mode to the protection mode----Blog, http://blog.csdn.net/shunqiziranhao007/article/details/8522424Date, January 1, January 20, 2013----
I learned about the implementation of an operating system and found this book when searching for the protection mode. This book is about to go public recently, the author provides the PDF and other related documents
The setting of the, in addition, for example, if the two symbols are the same, the result is the opposite, then of=1; otherwise of=0; (if the two-digit symbol is opposite, it will not overflow).The setting of the CF, the most significant bit (BIT7, for example) to the high carry is 1, otherwise 0. So actually the of is an overflow that represents a signed number, and CF is an overflow that represents an unsigned number.Understanding the carry, from the AF bit settings easier.The difference betwe
, indicates that the Pentium supports the CPUID instruction. Only valid for CPUs above Pentium.A means of testing the flag bits is provided in debugger debug, which uses symbols to denote the values of certain flags, as shown in the following table.
Flag Name
Flag is 1
Flag is 0
of overflow (yes/NO)
OV
NV
DF direction (decrement/increment)
Dn
Up
If interrupt (Allow/close)
Ei
DI
SF symbol
P1M1 DATA 0x91//=00---> Quasi-bidirectional port,---> Push-Pull mode =10---> Input mode, one---> Open-drain mode P1M0 DATA 0x92// =00---> Quasi-bidirectional,---> Push-pull mode =10---> Input mode,---> Open-drain mode ORG 10//Set the start address of the next program start: CLR a//To A clear 0 MOV P1M1, a //set A to a quasi-bidirectional port (some microcontroller does not need to be set up) MOV p1m0, a //Set A to a quasi-bidirectional port (some microcontroller does not need to be
: + Loop SSL1 - PopCX $ Loop SSL $ PopCX - ret - the Over : - movax,4c00hWuyi int21h the code ends -End Starthj9.asmProgramming Project 10Three ' happy Spring festival! displayed diagonally on the screen ', the color of the string is blue, green, and red, and the color of each string is changed by law. See the Demo4.gif example.Reference code:1AssumeCS:Code2 3 Data Segment4Db'Happy Spring festival!'5 DB 01h,02h,04h,01h,02h6 Data Ends7 8 Stack Segment9Dw8
Programming Project FiveDefine a data segment as follows:Data segmentDB ' [email protected] #O *^[email protected]$%% $T 1O m33e44e55t y77o88u! ()‘db '? 'Data endsNote: The first line of string is the data to be processed, '? ' Ends the symbol as a string.The design program completes the following actions:(1) Remove letters, spaces, '! ' other than the character;(2) Change the string in the data segment to ' hello! ' by exchanging data between the memory Nice to meet you! ' ;(3) In the center of
via MOV PC,LRBX with state switch jump instructionFormat: Bx{cond} RmWhen the BX instruction is executed, if the condition cond satisfied, then the processor checks whether the RM is [0] is 1, if 1, which will cspr the T 1 of the Register, and interprets the target code as a thumb code to execute. For 0, reset the t of the CSPR register. and interpret the target code as arm code to execute.eg.code 32ADR R0,thumbcode+1 BX R0 @跳转到thmbcode,并将处理器切换为thumb模式 thumbcode:.code 16...BLX Jump instruction
*1024byte. Extension: From the above found nothing, so look: 1kb=2 10 square byte,1mb=2 of the 20 square byte,1gb=2 of the 30 square byte, do not have to know 1TB equals 2 40 Times Square byte. 500G HDD should be able to store 2 of the 39 bytes (regardless of 500G of the hard drive on the computer actually only about 465G). The address bus widths of 5, 8080, 8088, 80286, 80386 are 16 root, 20 root, 24 root, 32 root, respectively, what are their addressing capabilities? Answer: 2 of the 16-time s
1. Calculationmov ax,62627 Ax=f4a3hmov ah,31h Nbsp;ax=31a3hmov al,23h ax=3123hadd ax,ax NBSP ; ax=6246hmov bx,826ch bx=826chmov Nbsp;cx,ax cx=6246hmov NBSP;AX,BX NBS P ax=826chadd NBSP;AX,BX NBSP;AX=04D8HM OV NBSP;AL,BH ax=0482hmov NBSP;AH,BL ax=6c82hadd ah,ah Nbsp;ax=d882hadd al,6 ax=d888hadd al,al ax=d810hmov NBSP;AX,CX ax=6246H This is actually a test of our ability to use Debug. With wr
open input file ' Graphics.lib '"Copy the graphics.lib into the c:\minic;Compile the message again: "Unable to open input file ' Cs.lib '"Copy the Cs.lib to the C:\minicCompile successfully again, all the files required to compile the link are gathered up.(ii) Thinking about the solutions to the problem:Compile the required files for the link, c0s.obj,emu.lib,maths.lib,graphics.lib,cs.libTC Related File Search scopes: If there are settings, the search settings path. If there is no setting, sear
service program), one BIOS, one DOS, and the use of interrupt mode (INT) for execution.
Higher DOS level, priority should be used. The second is the BIOS (write ROM, which is part of the hardware), and finally the peripheral calling program.
80x86 instruction system and addressing method
One address (INC, DEC), two addresses (majority), three address directives (few, such as SHL).
Operation code as long as the unique binary code can be determined, but in order to facilitate the
Assuming that the program is to be loaded into the sa:0000 memory by a DOS system, the memory at this address will begin with a 256-byte PSP program for loading programs and DOS system communication. The address in the DS is SA.The real program will be after these 256 bytes. So the address of the real program is: sa+10h:0000. The address in CS is: sa+10hWhy 10h, because the segment address to the left offset 4 bits, equivalent to *16, 16*16=256.Assembly
PUSHF and PopfThe function of PUSHF is to stack the value of the flag register, and the Popf is to get the data from the stack and enter the flag register.PUSHF and Popf provide a method for direct access to registers.FormatpushfpopfNone of the two instructions are added, and the default operand is: all flag registers.The representation of the flag register in DebugIn registers, the flag is stored as a separate representation of each of the marked bits that make sense. In Debug, we can see:
I. RET and RETFWe use the assembly syntax to explain the ret and RETF directives:When the CPU executes a RET instruction, it is equivalent to:
Pop IP
When the CPU executes the RETF instruction, it is equivalent to:
Pop IP (the general IP is at the low address)
POP CS (cs at high address)
Second, call commandThe CPU executes a call instruction and performs two steps:(1) Press the current IP or CS and IP into the stack;(2
type of CPU register for "assembly language"
1. General Register: AX, BX, CX, DX
AX: Cumulative register, BX: Base Register, CX: Count register, DX: Data register
Ax,bx,cx,dx each of the 16-bit 2bytes registers, where Ax is divided into Ah and al, and BX can be divided into BH and bl,cx and DX is also the same, and Ah and Al space is 8-bit 1byte space, for example, if ax=3478h, then ah=34h, al=78h
Where B
Assembly Language Programming Example one of these chapters, we have to bring together the knowledge we have learned. Specifically, let's write a program that uses ODBC APIs. For simplicity, I use Microsoft's Access database (Microsoft Access 97) in this program.
Note: If you are using a windows.inc of 1.18 and the following version, you should modify one of the minor bugs before you begin compiling. Looki
The article was well written and I gave it to me. Ref: On Wed, Sep, 2003 at 01:07:25pm-0700, Garret.spears wrote: > refernce: > gcc-2.95.3-m520 0-x Assembler LED. S before you compile a assembly source file, you should decide whether your want to pass it through the C preprocessor (CPP) or not. If you decide to the preprocessor and you should name your Source-file "something. S "(capital" s "); If not and then you should name it "Something.s" (lowcase
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