From MorphOS Library
Eject - Simple command to eject CD media
DEVICE, UNIT/N, LOCK/S, UNLOCK/S, EJECT/S, LOAD/S, TOGGLE/S, JIFFIES/N
DEVICE - The name of the device to eject UNIT - The unit number of the device to eject LOCK - Locks the device and prevents ejecting by other means UNLOCK - Unlocks the device and allows ejecting again EJECT - Ejects media from the device LOAD - Loads media to the device TOGGLE - Toggles between ejecting and loading of the device JIFFIES -
The default option is to toggle the found CD drive.