Question

Write a machine language program to output the three characters "Cat" on the output device. Write it in a format suitable for the loader and execute it on the Pep/9 simulator. How would I write this in machine language?

Answer 1

#Machine Language Programm To Print Output As "Cat" :-

Firstly What Could Be The Algorithm For Printing Cat ?

Algorithm :-

0000 load byte A<- ‘C’

0003 output value in A

0006 load byte A<- ‘a’

0009 output value in A

000C load byte A<- ‘t’

000F output value in A

0012 Stop

0013 ’C’ ‘a’ ‘t’

Now We Need To Write Same Algorith Which Can Be Executed On Pep-9 Simulator ?

Algorithm :-

0000 D1 00 13 ; load byte A<- Mem[0013] =43=‘C’

0003 F1 FC 16 ; output value in A

0006 D1 00 14 ; load byte A<- Mem[0014]=61=‘a’

0009 F1 FC 16 ; output value in A

000C D1 00 15 ; load byte A<- Mem[0015]=74=‘t’

000F F1 FC 16 ; output value in A

0012 00 ;stop

0013 43 61 74    ;’C’ ‘a’ ‘t’

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