[NTLK] Connecting to Win 10

[Tere]

Okay, so I decided to try out my MP2100 after a decade or so sitting on the
side lines. My goal is to dump the ROM and get Einstein running on my old
Galaxy Note 4.

After a week or two of tries and fails, I found a combination of computer
and serial cable that will provide a connection. But then I hit a wall. I
ended up connecting to a Surface Pro 6, using an old Newton serial port to
DB9, going into a Keyspan USA-19HS. I have an Ser001 installed, but don't a
cabling solution to get to DB9 or USB.  I'm using NCUWin710 version of
Newton Connection Utility on the SP6.

So, where I'm at now... I plug in the Newton to the SP6. start up
NCUWin710, tap Dock on the 2100. At this point, before the Keyspan, I would
get a timeout error, that the connection was stopped because there was no
response from the computer. But with the keyspan, it prompts me for a
password. I tried the PIN I set on the 2100, along with every old PIN I
could think of. I even tried my ATM PIN. I tried known defaults, 0000,
1234, 1111, etc. I removed the PIN from the 2100 and checked "Save
password" in Dock prefs, hoping it would tell NCU that there is no PIN. I
completely uninstalled and re-installed NCUWin710. After tapping Connect,
before or after entering the password, the Connection Status on NCU
changes. The text switches from "Start by establishing a connection..." to
"Connected..." and back again. The icon always has an X. So the Newton and
computer are talking to each other.

Questions: Does NCU REQUIRE a PIN to connect, or can one set it up without
a PIN? I know I can change the PIN in NCU setting, but I need the old PIN
to do that. Is there a way to clear a PIN without the old PIN? How does
removing the PIN from the 2100 effect NCU? Is there a cache or resource
where the PIN is saved that survives uninstalling?

Brief history:
I tried a CableCreation w/ Prolific chipset, and a CoolGear w FTDI. I tried
connecting to both my SP6 and a 13 in white MacBook, early 2009. I load and
reloaded different driver versions, different Connection versions. I even
tried running older ones in different Win 10 compatability modes. They only
go back to Win XP, so no go. I considered installing a virtual PC and Win
98, but put it off until the Keyspan cable arrived.

Any help or ideas would be greatly appreciated. Thanks!

- Tere