May 2014
Beginner to intermediate
216 pages
8h 42m
English
Content preview from Programming for Microprocessors
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11
High-level languages
Any notation for writing programs is called a language'. All the pro-
grams presented so far are written in symbolic assembly language,
which is characterised by being very closely linked with a particular
type of processor.
A high-level language is a notation that allows an algorithm to be
expressed in a more natural, 'mathematical' way. For example, one
could write:
AVE := (TEMPA + TEMPB + TEMPC + TEMPD)/4
instead of:
LDA A, TEMPA
ADA A, TEMPB
ADA A, TEMPC
ADA A, TEMPD
ASR A
ASR A
STA A, AVE
or again,
IF TA - TB < 15 THEN GOTO XX
instead of
LDA A, TA
SUB Α,ΤΒ
CMP A, #15
BMI XX
Most engineers are familiar with a high-leve ...
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