Q $111) At one time, Commodore attempted to manufacture a dual
drive version of the 1571 called the 1572. For what
technical reason did it utimately fail?
A $111) One must remember that the 1571 DOS was a descendant
of the 1540 DOS, which was in turn a descendant of the
earlier dual drive IEEE drives. To make the 1572,
Commodore engineers tried to re-introduce the dual
drive code that had been removed when Commodore started
producing single disk drives. Unfortunately, the
re-introduction did not ultimately succeed.