6502 BASIC or Assembler and Intel 8271/WDC 1770 info req'd - test-drb@ccmp.vtda.org

7 Oct 2001

From: Eric Dittman &lt;dittman(a)dittman.net&gt;
...
 The third-party controllers were most popular on the
Model 1, since the stock
...
 FDC was SD.  There were a few third-party controllers
for the Model III and
...
 the early Model 4, but they weren't as popular as
the 1793 was more capable.
...
 The stock Model 1 FDC also had reliability problems
that lead to third-party
...
 data separator plug-in circuits. 

Yep, the M1 data sep was the 1771 internal and that was at best terrible
and WD would tell you that.  That lead to the Piggyback card to at least
add a decent data sep.  The 1793 came later but was very desirable
as the 35/40track Single sided FD100 or SA400 drives were tiny storage
wise.

Allison