Nomenclature and Symbols
In the nomenclature of the time when these machines were designed, "K" was taken to mean one kilobyte, so that is how it is expressed here. Similarly, further, on the family of processors use by Atari machines, in the assembly language "$" introduced a hexadecimal number, or it was suffixed subscripted with its radix, so, for example, "one hundred and twenty-eight" is "12810", "$80", or "8016". If a number is expressed with no radix, decimal (10) is assumed, and a leading 0 does not imply octal. These are used instead of more modern conventions because they appear as such in many of the sources and will be seen often by those using simulators and so forth.
Read more about this topic: Atari BASIC
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