Expanding the 1050's strength is
what ICD's US Doubler is all about...
a true performer in the niche of
hardware modifications.  With the
simple addition of this chip set,
your Atari is transformed into a
powerhouse, radiating with innovative
qualities never before posessed in a
1050; like true double density for
greater storage and an accelerated
I/O rate designed to triple your speed
when combined with SpartaDOS.

  Furthermore, the US Doubler is fully
compatible with existing Atari software
and not only supports true double
density, but single density and the
130KB 'dual density (1050 mode)' as
well.  ICD's US Doubler package comes
complete with two plug-in chips and
SpartaDOS Construction Set (including
two manuals and two program diskettes).

  The US Doubler 1-4 package allows you
to purchase the US Doubler chip set
without SpartaDOS.  This allows you to
equip several 1050s with the US Doubler
without paying for the SpartaDOS
Construction Set for each drive!