30 May
2000
30 May
'00
10:19 a.m.
>Just as an aside, I recently encountered a
datasheet for the WD 1773 FDC
>(similar to 1770/72). Do you know of any systems in which it was used?
the 1770/1772 was the 1793+8229+glue on one chip.
Wasn't the 1773 a single-chip version of the 1793,
or am I out in Left
The 1773 was the earlier single density controller.
The 1793 was the later DD and SD controller in nearly the same pinout
and basic IO.
Field? The early Tandy controllers that required 12V
were based on the
1793, and weren't the later 5Vonly ones based on the 1773?
No. The tandy used the 1773 and was wired to provice the -5V and +12V
as needed but there were parts that didn't use the -5V (SMC 1773).
The 1793 wanted +12 and +5 though there were 5volty only versions later on.
Allison