On Sat, 3 Feb 2007, Jim Battle wrote:
By comparison, the apple II controller is brilliant.
Yes, there existed
disk controllers with DMA, but those were more complex and cost a whole
lot more in 1977. Besides, the Apple II had a great expansion bus, and
some enterprising company could have plopped a 177x disk controller in
machine at the point it made sense, but apparently it never did as its
market was happy with what apple offered.
Sorrento Valley Associates?