Thank you Draco!
Yes. I know that 16-bits addressed HD is slightly faster then 8-bit addressed RD.
(I dreamed about it from 2005 and you advised me to contact jurek etc),
but my unit lost it's battery and it seemes to me that it can't be replaced.
Now I use Lenore's SuperSDX and evidently awaiting SDX upgrade.
All of SDXer's use 448 beta, but me...
Yesterday I set up PCLINK with RespeQT -> Superthing!
(Very poor documentation as from pclink side as from respeqt side.)
I hope that PCLX: devices will obtain it's letter-number naming in future DOS releases.
MAE does not like long device naming.
Really MAE is a step to cosmos! It's very fast and it's created for people.
Best wishes from Moscow!