Sanyo MBC-550 Series User Manual page 209

When you have entered all the commands you need,
depress the CTRL and Z keys together, and then the
RETURN key. An Asterisk * will appear in the far
right. Enter E to end and depress the RETURN key. You
are at the system level. If you enter a DIR you will
see the file you have created. You may execute the
file by entering the filename only, do not include the
extension .BAT
10:*~Z
(This is the CTRL and Z keys
entry followed by RETURN)
*E
A:
4-12