ELEC 4

ELEC 4

1. Programming

   • Types of programming
     • Machine Code
       • Example: Binary 0/1
     • Compilied Lanuges
       • These are high level langues like c++ and php
     • Interpterted Languges
       • These are simple languages like basic and Pascal
         • Includes Assemblers
   • Subroutines
     • Small sections of code, they perform a function within themselves and can called by the main code.
   • AQA Instruction Set
     • Clock Cycles, This how long it takes the processor to perform the task. Most take one clock cycle.
     • Operands
       • mnemonics are small codes which perform task Operands are the 'data' appended to that mnemonic which makes it function., ADDW is the mnemonic and 0x1 is the operand
     • '<=' or '=>' Means copied to with the arrow showing the direction of data travel. W <= W+K means k plus w then copied over W
   • Flags
     • Carry Flag - this is when a binary number overflows to more than 8bit
     • Timer Flag - This when a timer reaches 0 after counting down
     • Zero Flag - This is set when 0 is left in working register. So working register is clear

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