Tarbell is making me insane

[Fred Cisin]

> One little nasty.  The 1771 has a basic ability to do data seperation.

Well, it purports to.
The quality of the internal data separation sometimes leaves a bit to be
desired.  Percom sold an astonishing number of add-on data separator
sandwich boards to TRS80 owners.

Then they switched to selling a sandwich board that added a 179x for
double density, while still retaining the 1771, for the oddball DAMs that
it could provide (needed for TRS80)