I talked an RD53 into working - Thanks to that file Tim pointed me at!
I also made an RX33, but I haven't tried it yet.
Turns out the 53 didn't have that R7 jumper in it.
BTW, on my drive, R7 was up in the connector-end corner, not by the hinge as
described, but jumpering it works OK.  I just have to get a few files I missed
copied, and it runs completely.  Thanks!
Now, I just have to come up with a portable terminal of some sort...
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