DS

Syntax:
<label> DS.B <number>
<label> DS.W <number>
<label> DS.L <number>

Operation: Reserve A5-relative global variable space. The
DS command directs the linker to reserve A5-relative
space. The A5-offset (a negative number) is associated
with a required label. A number or numeric equation
specifying the number of bytes, words, or long words to
reserve must follow DS. If a length extension (.B, .W, or
.L) is omitted, the assembler assumes a word size.
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