Flashcards

software

Leon Clark English 9 cards

Cards in this deck (9)

1low-level codeexecuted directly by the computer
difficult for humans to understand
2 types: assembly and machine code
2machine codewritten entirely in binary - difficult to program
consists of a list of commands (each command has 2 parts, an opcode, and an operand)
only work for the intended CPU
3opcodea binary value that represents an instruction (e.g. load, store and add)
opcodes are unique to each CPU
4operandthe data that the instructions apply to
5opcode and operand example00000001 00101100 00000100 00000011
could mean load 44 into the accumulator and store in memory address 3
6assemblyuses MNEMONICS rather than binary - easier to program
remember little man computer
7assembly exampleload 5
add 4
store 2
load 5 into the accumulator, add 5 and store in memory address 2
8assemblertranslates the MNEMONICS into binary opcodes and operands
9high-level codefar easier for humans to understand
needs to be translated into machine code
languages include python, green foot and C++
compatible with a wide range of processors