DOS 3.3: RENUMBER and the FRE(0) command

RENUMBER doesn't always reset the variable pointers when it returns to Applesoft, causing the Apple to hang or drop into the monitor when the PRINT FRE(0) command is used.
To check the amount of free memory left after a RENUMBER operation, CLEAR before using PRINT FRE(0).
Published Date: Feb 18, 2012