Remote Processing BASIC for the CX-10 Modbus - Manual (Page 30)

BASIC PROGRAMMING GUIDE
2-21
FREE
Syntax: FREE
Function: Returns the bytes of available in program RAM
Mode: Command, run
Use: PRINT FREE
DESCRIPTION
FREE returns how many bytes of RAM are available to the program and Basic variables. It does not return
the amount of expanded RAM in 128K or 512K RAM systems. The amount of free memory is determined by
the following formula:
FREE = MTOP - LEN - system memory
"system memory" on cards with two serial ports is 1791. Add 512 bytes for any additional serial ports on a
card.
RELATED
LEN
ERROR
BAD SYNTAX Attempt to assign a value to FREE