130,131



     DOS 2.0 is present, it points to 7420 ($1CFC). When you change
     your drive and data buffer defaults (see 1801, 1802; $709, $70A),
     you will raise or lower this figure by 128 bytes for each buffer
     added or deleted, respectively. When you boot up the RS-232
     handler, add another 1728 ($6C0) bytes used.
     LOMEM is also called ARGOPS by BASIC when used in
     expression evaluation. When BASIC encounters any kind of
     expression, it puts the immediate results into a stack. ARGOPS
     points to the same 256 byte area; for this operation it is reserved
     for both the argument and operator stack. It is also called
     OUTBUFF for another operation, pointing to the same 256 byte
     buffer as ARGOPS points to. Used by BASIC when checking a
     line for syntax and converting it to tokens. This buffer
     temporarily stores the tokens before moving them to the
     program. 

130,131        82,83          VNTP
     Beginning address of the variable name table. Variable names
     are stored in the order input into your program, in ATASCII
     format. You can have up to 128 variable names. These are stored
     as tokens representing the variable number in the tokenized
     BASIC program, numbered from 128 to 255 ($80 to $FF).

     The table continues to store variable names, even those no longer
     used in your program and those used in direct mode entry. It is
     not cleared by SAVEing your program. LOADing a new program
     replaces the current VNT with the one it retrieves from the file.
     You must LIST the program to tape or disk to save your program
     without these unwanted variables from the table. LIST does not
     SAVE the variable name or variable value tables with your
     program. It stores the program in ATASCII, not tokenized form,
     and requires an ENTER command to retrieve it. You would use a
     NEW statement to clear the VNT in memory once you have
     LISTed your program.

     Each variable name is stored in the order it was entered, not the
     ATASCII order. With numeric (scalar) variables, the MSB is set
     on the last character in a name. With string variables, the last
     character is a "$" with the MSB (BIT 7) set. With array variables,
     the last character is a "(" with the MSB set. Setting the MSB turns
     the character into its inverse representation so it can be easily
     recognized.
     You can use variable names for GOSUB and GOTO routines,
     such as:

     10  CALCULATE = 1000
     .
     .