About the Newton MessagePad ROM card
http://www.matthiasm.com/romCard.html [www.matthiasm.com]
2017-03-07 05:53
In the 90’s, flash memory was extremely expensive, so they had to use ROM chips that were mass-produced and could never be updated. But they knew that they would have changes to their firmware until release day, and they would need to able to fix bugs even after the machine was sold.
source: Dfly