There is no way to determine the RAM configuration without powering on the Apple MessagePad 120.
You can check the RAM configuration by tapping the information icon in the Extras drawer. The total of Used, Free, and System RAM installed will equal 1MB or 2MB.
Follow these steps:
1. Turn on your Apple MessagePad 120
2. Tap Extras
3. Tap the information icon ('i' in the lower left corner)
4. Tap Memory Info
5. Add the System RAM Installed, Used and Free numbers. This is the total flash RAM installed.
Example:
System RAM: 512k
Used: 952k
Total: 1873k (2MB)