Motorola Axiom CMD11E1 Guia do Utilizador descarregar pdf (Página 71)

5.5. WORKING WITH TABLES 71

lkploop

tstb

beq notthere *this is the basic counting loop

cmpa 0,x

beq foundit

inx

decb

bra lkploop

notthere

clc

rts

foundit

sec

rts

Exercise: Type the above program and enter the input: 1-800-UMD-ALUM. You

should see the following output. Clearly explain how the translation gets done.

=====================================

Lab on using Tables

Name: _____________________

This program is an infinite loop!

Hit the reset button to quit

=====================================

1 1

- -

8 8

0 0

- -

U 8

M 6

D 3

- -

A 2

1 2 ... 66 67 68 69 70 71 72 73 74 75 76 ... 100 101

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Motorola Axiom CMD11E1 Guia do Utilizador Página 71