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Flashcards

Assembly

Chris Pugh Computing GCSE Inglês 11 flashcards

Flashcards do conjunto (11)

  1. 1INPCopy the value from the "in box" onto the accumulator (calculator).
  2. 2STAStore the contents of the accumulator (calculator) to the mailbox of the given address. Note: the contents of the accumulator are not changed.
  3. 3LDALoad the contents of the given mailbox onto the accumulator (calculator). Note: the contents of the mailbox are not changed.
  4. 4ADDAdd the contents of the given mailbox onto the accumulator (calculator). Note: the contents of the mailbox are not changed, and the actions of the accumulator are not defined for add instructions that cause sums larger than 3 digits.
  5. 5SUBSubtract the contents of the given mailbox from the accumulator (calculator). Note: the contents of the mailbox are not changed, and the actions of the accumulator are not defined for subtract instructions that cause negative results
  6. 6OUTCopy the value from the accumulator (calculator) to the "out box". Note: the contents of the accumulator are not changed.
  7. 7HLTEnds the program
  8. 8BRASet the contents of the accumulator (calculator) to the given address. Note: since the program is stored in memory, data and program instructions all have the same address/location format.
  9. 9BRZIf the contents of the accumulator (calculator) are 000, the PC (program counter) will be set to the given address. Note: since the program is stored in memory, data and program instructions all have the same address/location format.
  10. 10BRPIf the contents of the accumulator (calculator) are 000 or positive (i.e. the negative flag is not set), the PC (program counter) will be set to the given address. Note: since the program is stored in memory, data and program instructions all have the same address/location format.
  11. 11DATWhen compiled, a program converts each instruction into a three-digit code. These codes are placed in sequential mailboxes. Instead of a program component, this instruction will reserve the next mailbox for data storage.

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GCSE Computing FlashCards sobre Assembly, criado por Chris Pugh em 24-03-2021.
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Chris Pugh
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