Motorola Axiom CMD11E1 Guía de usuario descargar pdf (Pagina 53)

4.5. ON YOUR OWN! 53

;v4 = 044;

ldaa #@44

staa v4

;total = v1+v2+v3+v4;

ldaa v1

adda v2

adda v3

adda v4

staa total

;print total as 2 digit hex number

ldaa total

jsr outlhlf

ldaa total

jsr outrhlf

swi

org $3000

v1 rmb 1

v2 rmb 1

v3 rmb 1

v4 rmb 1

total rmb 1

opt s

Modify the C program so that v3 = ’A’; is replaced by v3=getchar();. Run

the C program and type the upper case letter A and press enter. You should

see the same output as before. Now replace the instruction ldaa #’A’ by jsr

inchar and make sure that you equate inchar to $ffcd. Run the assembly above

assembly language program and verify that it behaves the same as the C program.

4.5 On your own!

1. Write an assembly program that does the same as the following C program:

#include <stdio.h>

1 2 ... 48 49 50 51 52 53 54 55 56 57 58 ... 100 101

Sin comentarios

Motorola Axiom CMD11E1 Guía de usuario Pagina 53