software density select with tc13 & fuji 2444-ac

[rick at seismo.UUCP]

I have a Vax 11/780 running 4.3BSD with an Emulex TC13 controller
(emulating a ts-11) connected to a Fuji-2444AC tape drive.

Everything works fine except that I can not set the density on the
tape drive from software. Emulex swears that if the driver sets the right bit
in the characteristics packet, that the contoller will set the density on
the drive. (It's always a driver problem to them.)

A scope on the density select pin out of the controller shows that the
line never goes high to indicate hi density. A printf in the ts driver
(obviously modified for dual density) shows that the correct bit is being
written into the controller.

Has anyone tried to do a software density select with an Emulex TC13?

I'm out of things to try.

---rick