Basic Computer Notions Software

Next A simple computer Instruction format Instruction format (cont'd) Machine instructions Machine instructions (cont'd) Machine instructions (cont'd) Machine instructions (cont'd) Machine instructions (cont'd) Machine-language Programming Machine-language Programming (cont'd) Machine-language Programming (cont'd) Machine-language Programming (cont'd) Machine-language Programming (cont'd) Machine-language Programming (cont'd) Machine-language Programming (cont'd) Machine-language Programming (cont'd) Machine-language Programming (cont'd) Machine-language Programming (cont'd) Machine-language Programming (cont'd) Machine-language Programming (cont'd) 21 of 50 Machine-language Programming (cont'd) Machine-language Programming (cont'd) Machine-language Programming (cont'd) Machine-language Programming (cont'd) Machine-language Programming (cont'd) Machine-language Programming (cont'd) Machine-language Programming (cont'd) Machine-language Programming (cont'd) Machine-language Programming (cont'd) Sample data Using an ‘intelligent’ computer Using a not-so-intelligent computer Using an ‘English-like’ query system Using a highly interactive system Using a highly interactive system (cont'd) Using a highly interactive system (cont'd) Using a highly interactive system (cont'd) Using SQL (Structured Query Language) Using a report-generation language Using a general-purpose high-level programming language Using assembler language Compilers and interpreters Compilers and interpreters (cont'd) Types of software Operating systems Operating systems are very complex Operating systems need to be very robust Consequences Consequences (cont'd)

Machine-language Programming (cont'd)

Expressing the addresses as binary numbers ... 

00000          GET SCORE1
00001          ADD SCORE2
00010          PUT TOTAL
00011          ADD (-50)
00100          JUMPGT PASS
00101          GET ('F')
00110          JUMP END
00111  PASS:   GET ('P')
01000  END:    PUT GRADE
01001          STOP
01010  SCORE1: **
01011  SCORE2: **
01100  TOTAL:  **
01101          -50
01110          'F'
01111          'P'
10000  GRADE:  **

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Last modified: Thu, 2007 Mar 15 08:35:42

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