Altair Disk Basic, How Do I return to the monitor program?

[lovenewyawkcity]

Until I can afford an Altair Kit, Am using Simh to emulate an altair. Is

there a way to return to the monitor / vice versa after loading Disk Basic?

I tried poking a value into the starting addres of the monitor but only got

an overflow error.

My Memory Map is as Follows:

88DSKROM.BIN 0000 (STARTING ADDRESS 0)
Turnmon.bin - FD00


Thanks for your help in advance,

Nicky