Thursday, April 21, 2016

Description and Example of Name Field


The name field is used for instruction labels.procedure names, and variable names. The assembler translates into memory addresses.

Names can be from 1 to 31 characters long, an may consist of letter, digits, and the special characters ? . @ _ $%. Embedded blanks are not allowed. If a period is used, it must be the first character. names may not begin with a digit. The assembler does not differentiate between upper and lower case in a name.


Examples of legal names

COUNTER1
@character
SUM_OF_DIGITS
$1000
DONE?
TEST


Examples of illegal names

TWO WORDS                             contains a blank
2abc                                              begins with a digit
A45.28                                          .not first character
YOU&ME                                     Contains an illegal character