Max filesize: 984 bytes, max filename length: 20 characters

Command line commands:
catalogue - file directory
catalogue <string> - file directory, show filenames containing string
cls - clear screen
delete <filename> - delete file
exec <filename> - execute program file
exit - quit interface
help - show list of commands
new <filename> - open editor for a new file
type <filename> - print out full contents of a file
ver - print out version string

Command line can also be used for immediate code execution.

Editor commands:
save - quits editor and saves file with filename given in new command
discard - quits editor without saving
rmline - removes last line
type - print out full contents of a file

Batch files:
File size is limited to 984 bytes to prevent save game corruption. This limits what programs you can create.
Batch files are special files that allow you to string several programs together as one large program with shared resources.
A batch file has a filename that begins with "bat!" and contains a list of comma separated filenames.
Calling a batch file from another batch file is not supported.

Example batch file:
Preexisting files:
  prog1
  prog2
  prog3
Batch file:
  bat!prog
    prog1,prog2,prog3