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The first day of the 30-day homemade operating system

の (2にしなければいけない)Dd0 ;パーティションを make ってないのでここは must ず0Dd2880 ;このドライブ Big きさをもう once book BootcutDb0,0, 0x29;よくわからないけどこの にしておくといいらしいDD 0xFFFFFFFF;たぶんボリュームシリアル designationDb"Hello-os" ;ディスクの name (11バイト)Db"FAT12" ;フォーマットの name (8バイト)Resb - ;とりあえず18バイトあけておく;プログラム Bodydb 0xb8, 0x00, 0x00, 0x8e, 0xd0, 0XBC, 0x00, 0x7c DB 0x8e, 0xd8, 0x8e, 0xc0, 0xBE, 0x74, 0x7c, 0x8a db 0x04, 0x83, 0xc6, 0x01, 0x3c, 0x00, 0x74, 0x09 DB 0xb4, 0x0e, 0xBB, 0x0f, 0x00, 0xCD

30-Day homemade operating system study notes-1th Day

number .Db"Hello-os" ;disk name, 11 bytesDb"FAT12" ;disk format name, 8 bytesResb - ;empty 18 bytes First;Program Bodydb 0xb8, 0x00, 0x00, 0x8e, 0xd0, 0XBC, 0x00, 0x7c DB 0x8e, 0xd8, 0x8e, 0xc0, 0xBE, 0x74, 0x7c, 0x8a db 0x04, 0x83, 0xc6, 0x01, 0x3c, 0x00, 0x74, 0x09 DB 0xb4, 0x0e, 0xBB, 0x0f, 0x00, 0xCD, 0x10, 0xeb DB 0xEE, 0xf4, 0xeb, 0xfd;Information Display SectionDB 0x0a, 0x0a;Two line breaksDb"Yatesosask"DB 0x0a;line Br

Split the file and perform Base64 encoding/decoding

, 0xd3, 0xac, 0x62,0x91,0x95, 0xe4, 0x79, 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, 0xba, 0x78,0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, 0x70, 0x3e, 0xb5, 0x66,0x48,0x03, 0xf6, 0x0e, 0x61,0x35,0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, 0xe1, 0xf8, 0x98,0x11,0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55,0x28, 0xdf, 0x8c, 0xa1,

Graphic buttons created through text transfer

= $ vmidth-(imagefontheight ($ font)/2 ); $ Font --; } While ($ x // ============================================== // ====== [Now we create the button] === If (isset ($ width) | isset ($ heigth) {// size change expected? $ Ima = imagecreatefromgif ("symbol button.gif"); // open input gif $ Im = imagecreate ($ buttonwidth, $ buttonheigth); // create img in desired size $ Uglybg = ImageColorAllocate ($ im, 0xf4, 0xb2, 0xe5 ); ImageRectangle ($ im, 0,

Micro (1)

HelloWorld servicetype HelloWorldHandler interface {Hello (context. Context, *helloworldrequest, *helloworldresponse) error}func Registerhelloworldhandler (s server). Server, HDLR HelloWorldHandler, opts ... server. handleroption) {S.handle (S.newhandler (AMP;HELLOWORLD{HDLR}, opts ...)} Type HelloWorld struct {helloworldhandler}func (H *helloworld) Hello (CTX context. Context, in *helloworldrequest, out *helloworldresponse) error {return H.helloworldhandler.hello (CTX, in, out)}func in It () {

Golang version of the CRC16 Check (table method)

, 0x1D, 0x1C, 0xDC, 0x14, 0xd4, 0xd5, 0x15, 0xD7, 0x17, 0x16, 0xd6, 0xd2, 0x12, 0x13, 0xd3, 0x11, 0xD1, 0xD0, 0x10, 0xF0, 0x30, 0x31, 0xF1, 0x33, 0xf3, 0xF2, 0x32, 0x36, 0xf6, 0xf7, 0x37, 0xf5, 0x35, 0x34, 0xf4, 0x3C, 0xFC, 0xFD, 0x3d, 0xFF, 0x3F, 0x3e, 0xFE, 0xFA, 0x3A, 0x3B, 0xFB, 0x39, 0xf9, 0 XF8, 0x38, 0x28, 0xe8, 0xe9, 0x29, 0xEB, 0x2B, 0x2A, 0xEA, 0xEE, 0x2e, 0x2F, 0xEF, 0x2D, 0xED, 0xEC, 0x2C, 0 XE4, 0x24, 0x25, 0xe5, 0x27, 0xE7, 0xe6, 0x26, 0

The problem of tinyxml parsing UTF-8 strings

, 1, 1, 1, 1, 1, 1, // 0x70 end of ASCII range1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 0x80 0x80 to 0xc1 invalid1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 0x90 1, 1, 1, 1, 1, 1,1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 0xa0 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 0xb0 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, // 0xc0 0xc2 to 0xdf 2 byte2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, // 0xd03, 3, 3, 3, 3, 3, 3, 3, 3, 3,3, 3, 3, 3, 3, // 0xe0 0xe0 to 0xef 3 byte4

Java SMS4 Encryption Algorithm

, (byte) 0xcc, (byte) 0xe1, 0x3d, (byte) 0xb7, 0x16, (byte) 0xb6, 0x14, (byte) 0xc2, 0x28, (byte) 0xfb, 0x2c, 0x05, 0x2b, 0x67, (byte) 0x9a, 0x76, 0x2a, (byte) 0xbe, 0x04, (byte) 0xc3, (byte) 0xaa, 0x44, 0x13, 0x26, 0x49, (byte) 0x86, 0x06, (byte) 0x99, (byte) 0x9c, 0x42, 0x50, (byte) 0xf4, (byte) 0x91, (byte) 0xef, (byte) 0x98, 0x7a, 0x33, 0x54, 0x0b, 0x43, (byte) 0xed, (byte) 0xcf, (byte) 0xac, 0x62, (byte) 0xe4, (byte) 0xb3, 0x1c, (byte) 0xa9, (byt

ESP8266 WiFi module configuration, Wechat+app control implementation

First brush into the Aicloud 2.0 SDK file, Aicloud 2.0 specific information see Aicloud 1.0 and Aicloud 2.0 comparison app see the following QR code download.1, an Aicloud 2.0 at firmware ai-thinker_esp8266_dout_aicloud_v0.0.0.6_20170517.7z downloadAicloud 2.0 at FirmwareCharacteristics:Aicloud 2.0 safe, stable and easy to useSimple to use, any MCU can be directly connected512+512map Firmware: ai-thinker_esp8266_dout_aicloud_v0.0.0.6_20170517.7zUpdated: May 17, 2017Update Description: 0.0.0.6 ne

Ogg transmission process Start error Missing filename opening checkpoint file.

*, unsigned int, ...) +0X2EC) [0x2b54dc27f88c]]: [/u02/ggs/libgglog.so (_msg_err_checkpoint_generic (csourcecontext*, Char const*, cmessagefactory:: messagedisposition) +0x31) [0x2b54DC270D35]]: [/u02/ggs/extract (Get_checkpoint_context (time_elt_def*, time_elt_def*) +0x200) [0X54EC00]]: [/u02/ggs/extract (Readcheckpoint () +0x39) [0x54ed69]]: [/u02/ggs/extract (Extract_main (int, char**) +0xa75) [0X57E7A5]]: [/u02/ggs/extract (Ggs::gglib::multithreading::mainthread::execmain () +0x4f) [0x63309f

Java version SMS4 encryption algorithm

, 0x16, (byte) 0xb6, 0x14, (byte) 0xc2, 0x28, (byte) 0xfb, 0x2c, 0x05, 0x2b, 0x67, (byte) 0x 9a, 0x76, 0x2a, (byte) 0xBE, 0x04, (Byte) 0xc3, (byte) 0xaa, 0x44, 0x13, 0x26, 0x49, (byte) 0x86, 0x06, (byte) 0x99, (byte) 0x9c, 0x42, 0x50, (Byte) 0xf4, (Byte) 0x91, (Byte) 0xEF, (byte) 0x98, 0x7a, 0x33, 0x54, 0x0b, 0x43, (Byte) 0xed, (Byte) 0xcf, (byte) 0xac, 0x62, (Byte) 0xe4, (byte) 0xb3, 0x1c, (byte) 0xa 9, (Byte) 0xc9, 0x08, (Byte

Java gets the CRC8 check code for the string (modified by the Code of the C program in order to Java code)

, 0x74, 0x7d, 0x7a,0x89, 0x8E, 0x87, 0x80, 0 X95, 0x92, 0x9b, 0x9c, 0xb1, 0xb6, 0xbf,0xb8, 0xAD, 0xAA, 0xa3, 0xa4, 0xf9, 0xFE, 0xf7, 0xF0, 0xe5, 0xe2,0xeb, 0xEC, 0xC1, 0xC6, 0xCF, 0xC8, 0xDD, 0xDA, 0xd3, 0xd4, 0x69,0x6e, 0x67, 0x60, 0x75, 0x72, 0x7B, 0x7C, 0x51, 0x56, 0x5f, 0x58,0x4d, 0x4A, 0x43, 0x44, 0x19, 0x1 E, 0x17, 0x10, 0x05, 0x02, 0x0b,0x0c, 0x21, 0x26, 0x2F, 0x28, 0x3d, 0x3A, 0x33, 0x34, 0x4E, 0x49,0x40, 0x47, 0x52, 0x55, 0 X5C, 0x5b, 0x76, 0x71, 0x78, 0x7F, 0x6a,0x6d, 0x64, 0x63, 0x3

The simplest virtual machine using the KVM IOCTL interface in the ubuntu12.04 environment

',%al out%al, (%DX) mov $ ' \ n ',%al out%al, (%DX) hltThis code acts as the guest OS, basically a bare-ben system. It implements the 0x3f8, then adds ' 0 ', turns 4 to ASCII ' 4 ' and outputs through the port. And then output the ' \ n ' and then shut down the machine.We put the binary that corresponds to the code into the array: Const uint8_t code[] = {0XBA, 0xf8, 0x03,/* mov $0x3f8,%dx */0x00, 0xd8,/ * add%bl,%al */0x04, ' 0 ',/ * add $ ' 0 ',%al */0xee,

Ogg transmission process Start error Missing filename opening checkpoint file.

*, unsigned int, ...) +0X2EC) [0x2b54dc27f88c]]: [/u02/ggs/libgglog.so (_msg_err_checkpoint_generic (csourcecontext*, Char const*, cmessagefactory:: messagedisposition) +0x31) [0x2b54DC270D35]]: [/u02/ggs/extract (Get_checkpoint_context (time_elt_def*, time_elt_def*) +0x200) [0X54EC00]]: [/u02/ggs/extract (Readcheckpoint () +0x39) [0x54ed69]]: [/u02/ggs/extract (Extract_main (int, char**) +0xa75) [0X57E7A5]]: [/u02/ggs/extract (Ggs::gglib::multithreading::mainthread::execmain () +0x4f) [0x63309f

Embedded C language bit operation &..|. ~.>>

0101 1001 0000 1010 1011 0011 0100 6 7 intj=0x37;//0011 0111 8 intk=0x42;//0100 0010 9unsigned untj=0x37;//0011 0111 Ten Oneprintf"jk is%x\n", jk);//0000 0010 Aprintf"J|k is%x\n", j|k);//0111 0111 -printf"~j%x\n", ~j);// -printf"~UNTJ%x\n", ~UNTJ);//1100 C8 the -unsigned ret=0; - //Place the 4th position of I 1 -RET = i| (13); +printf"i is%x\n", i); -printf"ret is%x\n", ret); + A //Place the 2nd position of I 0 atret = i ~ (12); -printf"i is%x\n", i); -pr

C # based on large integer class RSA algorithm implementation (public key encryption decryption, private key encryption decryption)

); } A method of obtaining large prime numbers by means of BigInteger //////obtains the key pair ///////// public void Getkey (out string n,out string E,out string d)         { byte[] pseudoPrime1 = { (Byte) 0x85, (Byte) 0x84, (Byte) 0x64, (Byte) 0xFD, (Byte) 0x70, (byte) 0x6a, (Byte) 0x9F, (Byte) 0xF0, (Byte) 0x94, (Byte) 0x0C, (Byte) 0x3e, (byte) 0x2c, (Byte) 0x74, (Byte) 0x34, (Byte) 0x05, (Byte) 0xc9, (Byte) 0x55, (byte) 0xb3, (Byte) 0x85, (Byte) 0x32, (Byte) 0x98, (Byte) 0x71, (Byte)

Methods and custom functions to get UTF8 string lengths in Lua _lua

Copy Code code as follows: ---Get the correct length of the UTF8 encoded string --@param str --@return Number function Utfstrlen (str) Local len = #str; Local left = Len; Local cnt = 0; Local ARR={0,0XC0,0XE0,0XF0,0XF8,0XFC}; While left ~= 0 do Local Tmp=string.byte (Str,-left); Local i= #arr; While Arr[i] do If Tmp>=arr[i] then Left=left-i;break;end I=i-1; End cnt=cnt+1; End return CNT; End The LUA string library does not support the processin

XV6 Learning lab1booting a PC

0xbfffe5f5 0xbfffe5f6 0xbfffe5f7 A[1] 0x90 0xf4 0x01 0x00 Add 0xbfffe5f8 0xbfffe5f9 0xbfffe5fa 0xbfffe5fb A[2] 0x00 0x01 0x00 0x00 Same as the result. I modified the Boot/makefrag inside the link address, the 0X7C00 to 0X7C01, re-run error, if the 0X7C01 set a breakpoint, then the card read boot sector that part, the QEMU interface is constantly

x/nfu-viewing memory with GDB

BUFIndicates that the contents are read from the memory address buf.H represents a unit in double-byte,3 means three units,U indicates hexadecimal display Detailed Examples: (gdb) List 1 #include 2 int Main () 3{ 4 5 //char A[1]; 6//a[0]= ' a '; 7unsigned Long Long md5=14126471717450151013; 8 9//printf (" %d\n ", a[0]); 10return 0; (GDB) break ten Breakpoint 1 at 0x8048372:file test.c, line. (GDB) Run Starting program:/data/compiler/g_platform/bradenwu/md5/test.out Break

The OGG rep process started encountering Sys.dbms_streams_adm_utl_invok. Set_foo_trigger_session_contxt (fire=>true);

(MAIN+0X1D9) [0x507399]] : [/lib64/libc.so.6 (__libc_start_main+0xf4) [0X353F21D9C4]]: [/u02/ggs/replicat (__gxx_p ERSONALITY_V0+0X1E2) [0x4e3ffa]] 2015-05-16 09:06:45 ERROR OGG-00868 ora-06550:line 1, column 7:pls-00201:identifi Er ' SYS. Dbms_streams_adm_utl_invok ' must be declared Ora-06550:line 1, column 7:pl/sql:statement ignored, SQL BEGIN Sys.dbms_st Reams_adm_utl_invok. Set_foo_trigger_session_contxt (fire=>true); END;. 2015-05-16 09:06:45

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