LDA & STA Instructions – LMC Load and Save

GCSE Computer Science Resources
14-16 Years Old

48 modules covering every Computer Science topic needed for GCSE level, and each module contains:

  • An editable PowerPoint lesson presentation
  • Editable revision handouts
  • A glossary which covers the key terminologies of the module
  • Topic mindmaps for visualising the key concepts
  • Printable flashcards to help students engage active recall and confidence-based repetition
  • A quiz with accompanying answer key to test knowledge and understanding of the module
View the GCSE Resources →

KS3 Computing Resources
11-14 Years Old

We’ve created 45 modules covering every Computer Science topic needed for KS3 level, and each module contains:

  • An editable PowerPoint lesson presentation
  • Editable revision handouts
  • A glossary which covers the key terminologies of the module
  • Topic mindmaps for visualising the key concepts
  • Printable flashcards to help students engage active recall and confidence-based repetition
  • A quiz with accompanying answer key to test knowledge and understanding of the module
View the KS3 Resources →

The following program will demonstrate the use of LDA and STA, the Load and Save instructions used in the .

Running the program: when prompted, INPUT a set of two numbers. The program should then OUTPUT them in the same order that they were entered.

INP
STA first
INP
STA second
LDA first
OUT
LDA second
OUT
HLT
first DAT
second DAT
0 INP
1 STA 9
2 INP
3 STA 10
4 LDA 9
5 OUT
6 LDA 10
7 OUT
8 HLT
9 . . .

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