commodore 128

Http://vintagecomputer.net/commodore/8088_co-processor/ Name Size (bytes) File date Msdos1.25 Dir 12/31/2008 MS-DOS_125a.jpg 90216 12/31/2008 Cpm_1b.jpg 91844 12/31/2008 Cpm_1a.jpg 108222 12/31/2008 MS-DOS_125b.jpg 124049 12/31/2008 CBII_8088-6509_interprocess_comm_ROM.pdf 1443261 01/16/2011 CBM_8088_CPU_co-processor_schematic.pdf 629

128 yards, 128 yards of code knowledge Structure of code 128The code 128 was launched in 1981 and is a variable-length, continuous letter-and-digit bar code. Compared with other one-dimensional codes, the 128 code is a more complex bar code system, and it supports more characters than other one-dimensional codes, ther

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Reference URL: http://www.cnblogs.com/zhangziqiu/archive/2011/03/30/ComputerCode.html 1, if the original code, so that the symbol bit also participate in the calculation, obviously for subtraction, the result is not correct. This is why the computer does not use the original code to represent a number. 2, set eight digits from high to low, respectively A7 A6 ... a0 The integer that it represents is:-a7* (2^7) +a6* (2^6) +a5* (2^5) +...+a0* (2^0) Therefore, the smallest integer it can represent i

Recently encountered a problem in the project, two values of the same integer value for = = comparison, found some of the mysteries of the integer, by the way also review the difference between = = and equals, first through the Damo code explained as follows: System.out.println ("integer x = value) in the value of The output results are: Integer x = value in the Through the above code and output results, we must have seen the mystery. The first is summed up as follows:1. The first and

Problem description Plsql developer executes a section of SQL error: After checking alert log detailed error message is: Ora-07445:exception Encountered:core Dump [EVAOPN2 () +128] [SIGSEGV] [Address not mapped to object] [0x000000000] [] [] Database version 10.2.0.4.0 Problem reason Oracle bugs caused by complex view merge problems Solving method 1, modify the hidden parameters: 2. Use hint No_merge Modifying the hidden paramet

mysql-uxx-pxx--ssl-ca=/opt/mysql/ssl/ca-cert.pem--s Sl-cert=/opt/mysql/ssl/server-cert.pem--ssl-key=/opt/mysql/ssl/server-key.pem-e \"show slave status\G;\" | Grep-i Master_host "`; [Python]View PlainCopyprint? # get Master host name or IP address Db01= ' echo $db 01tmp | awk ' {print $} ' # Start cleaning up Binlog log information [Python]View PlainCopyprint? SSH $db "Mysql-uxxx-pxx--ssl-ca=/opt/mysql/ssl/ca-cert.pem--ssl-cert=/op T/mysql/ssl/server

Learning machine learning problems arise, Baidu has not finished a half-day, but know the reason for the following reasons: Because Python uses ASCII encoding by default, and when Python converts between encodings, the Unicode As an "intermediate code", but Unicode is only 128 that long, so this error is reported here when attempting to convert an ASCII-encoded string to "intermediate encoded" Unicode because it is out of range. Now that you know

mysql-uxx-pxx--ssl-ca=/opt/mysql/ssl/ca-cert.pem--s Sl-cert=/opt/mysql/ssl/server-cert.pem--ssl-key=/opt/mysql/ssl/server-key.pem-e \ "show Slave status\G;\" | Grep-i Master_host "`; Copy Code code as follows: # get Master host name or IP address Db01= ' echo $db 01tmp | awk ' {print $} ' # Start cleaning up Binlog log information Copy Code code as follows: SSH $db "Mysql-uxxx-pxx--ssl-ca=/opt/mysql/ssl/ca-cert.pem--ssl-cert=/op T/mysql/

Tags: digital www. Highlight now img share image varchar How many versionsFirst to determine the MySQL versionMore than 5.0 versions, varchar (50), refers to 50 characters, whether it is stored in numbers, letters or UTF8 Kanji (3 bytes per kanji), can be stored 50In fact, the best way is to build a table in their own database to try to put how many Chinese characters, now MySQL is 5.0 already on, varchar (50) is can save 50 charactersNote: The number of bytes in different encodings of Chinese c

in C, the range of signed char types is -128~127, which is written in every textbook, but no book (including the teacher) will give you a -128~127, and the question seems simple and easy enough not to think about why, Is there a formula for an integer range: -2^ (n-1) ~2^ (n-1)-1 n is the memory footprint of an integer, so the int type 32 bits is then-(2^31) ~2^31-1-2147483648~2147483647, but why the minimu

in C, the range of signed char types is -128~127, which is written in every textbook, but no book (including the teacher) will give you a -128~127, and the question seems simple and easy enough not to think about why, Is there a formula for an integer range: -2^ (n-1) ~2^ (n-1)-1 (n is the memory footprint of integer type), so the int type 32 bits is-(2^31) ~ 2^31-1- -2147483648~ 2147483647, but why the m

1 PackageCom.hangao.basic;2 3 /**4 * @authorHangao [email protected]5 *6 */7 Public classTestint {8 Public Static voidMain (string[] args) {9Integer Ie1 = 127;TenInteger Ie2 = 127; OneSystem.out.println ("Integer 127==127:" + (Ie1 = = ie2));//Integer 127==127:true A -Integer ie3 =NewInteger (127); -Integer ie4 =NewInteger (127); theSystem.out.println ("New Integer 127==127:" + (ie3 = = ie4));//New Integer 127==127:false - -Integer IE5 =

Customer site, telecommunications-related 7*24h business, a province database two node alert constantly produce ORA-7445 error, and throw trace dump file, TRC file. One node alert does not have 7445 related errors, only the core file is generated. CRS, syslog and other logs no obvious alarm. Does not cause a restart and does not cause a business impact. Just constantly error, due to Oracle directory space 40G, in order to prevent the database instance rammer, the customer decided to resolve the

sense. And there will be [0000 0000] Original and [1000 0000] The original two codes represent 0.So the complement appeared, solved 0 symbols and two coding problems:1-1 = 1 + (-1) = [0000 0001] Original + [1000 0001] original =[0000 0001] Anti + [1111 1110] anti = [0000 0001] Complement + [1111 1111] complement = [0000 0000] Complement =[000 0 0000] OriginalSo 0 is denoted by [0000 0000], and 0 of the previous problem does not exist. And you can use [1000 0000] to represent-

participate in arithmetic operations. The modulo is 1000 0000 (0 Less Than the complement code)All the bits of the complement code can be added, and the modulo is 10000 0000 (the highest bit is not a sign bit, And the complement code is obtained by subtracting the absolute value of the negative number)5. Inference-128 of the original code and complement code (with complement = anti-code + 1) 1. For the original code 1000 0000, is it-0 or-

Why is the range of 8-Bit Signed numbers "-128-+ 127 "? (Reposted and supplemented) 11:22:57 | category:It | Tag:| Large font size, medium/small subscription This is a problem that has puzzled me for several years. It has left me extremely dissatisfied with the current textbooks and teachers. Since I started to touch my computer N years ago, in almost every C ++ textbook, the 8-Bit Signed value range is-128

127 and 128 of integers Integer a = 127; Integer B = 127; System.out.println (a==b); Extra byte will redistribute space Integer c = 128; Integer d = 128; System.out.println (C==d); Run Result: True,false First, it must be clear that if you compare two objects, "= =" is the address, and "equals" is the content As you can see, the addresses of A and B are the sam

When interacting with Java programs, the Java side uses AES 128-bit fill mode: Aes/cbc/pkcs5padding encryption method, the corresponding AES-128-CBC encryption method in the Nodejs can be corresponding, because there is the use of vector (iv), So the Createcipheriv method should be used in Nodejs, not createcipher.In this kind of encryption and decryption calculation, the most important thing to pay attenti

Why is the eight-bit binary number in the range (-128 ~~ + 127) Understanding,-128127 There are three methods for a computer to express the number of symbols: the original code, the reverse code, and the complement code. 8-digitOriginal and reverse codeThe value range is-127 ~ 127. 8-digitComplementThe value range is-128 ~ 127. The value range is-128 ~