I don't understand the question.
I asked what procedures to make it successful and avoid NOS (Newton OS) errors. So, I wondered about what the instructions were back in the day. What if, back in the day, it was needed to roll back to the original memory module? How was that done?
Unfortunately, it isn't easy to find those original instructions from Newer Technology or other third parties that offered the memory upgrade for the Newton eMate. Maybe someone like
@splorp would have that handy?
Installing the module *and then removing it* is what caused the 'factory calibration lost' error for me.
Was the eMate wholly powered off, including removing the rechargeable battery pack and the PRAM battery?
And I can't think of a good reason to remove the module once it's been installed. It increases RAM, internal storage space, and system speed (thanks to the bus widening effect).
Oh yes, definitely! Here is what Newer Technology had to say back in May 1998:
The eMate 300 comes with 1MB of DRAM, and 2MB of Flash RAM soldered to the motherboard. It has a single memory expansion slot. That slot accepts a memory card with either DRAM, Flash RAM, or both. The DRAM compliment on the card may be 0MB, 1MB, or 4MBs. The Flash Ram may be either 0MB or 2MB. The most common version of the card is 4MB of DRAM + 2MB of Flash RAM.
Adding 2MB of Flash RAM is beneficial for several reasons. Aside from the obvious benefit of doubling your internal storage space, there is a far more significant advantage. The 2MBs of Flash RAM soldered in the eMate, sit on a 16-bit wide data bus. When you add 2MBs of additional Flash RAM, the eMate reconfigures itself, and all the Flash will sit on a 32-bit wide bus. Now you have twice the storage space, accessed twice as fast.