Chapter 2: TI-83 Plus Specific Information 41
TI-83 Plus Developer Guide Third Release May 28, 2002
Note: These inputs are output from a successful Symbol Table search, such as FindSym.
DelVar
Error if the variable is archived. This routine checks the contents of
the b register to be non-zero. If the contents is non-zero, it
assumes the variable is archived and generates a system error.
Otherwise, delete it from RAM. The b register is set by any of the
Symbol Table search routines to reflect whether or not a variable is
archived.
DelVarArc
Delete the variable if archived or unarchived. This routine checks
the contents of the b register to be non-zero. If the content is non-
zero, then it assumes the variable is archived and deletes it from
the archive. Otherwise, it deletes it from RAM. The b register is set
by any of the Symbol Table search routines to reflect whether or
not a variable is archived.
DelVarNoArc
Assumes the variable is not archived and deletes it from RAM.
This routine does not check the contents of the b register and
assumes the pointers input are RAM pointers, not pointers into the
archive space. Only use this routine if you are absolutely sure that
the variable resides in RAM.
Note: OP1 through OP6 are kept intact.
For example, if matrix [A] exists and is not archived, delete it and recreate it with a
dimension of five rows and three columns.
return CA = 0 if successful, or
CA = 1 if it was archived or there was not enough free RAM to create it.
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