30 May
2000
30 May
'00
11:27 a.m.
The 1770/72/73 were 28-pin parts with output buffers suitable for driving a
cable and with internal data/clock separator, and a few other features, but
still code-compatible (sort-of) with the 179x series. The 177x series of
which I write were for 5-1/4" diskettes only.
The 1773 has slightly different pins, two of them, than the other two
members of its family.
Dick
----- Original Message -----
From: Roger Merchberger <zmerch(a)30below.com>
To: <classiccmp(a)classiccmp.org>
Sent: Tuesday, May 30, 2000 4:11 PM
Subject: Re: Defining Disk Image Dump Standard
Rumor has it that Richard Erlacher may have mentioned
these words:
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?
Wasn't the 1773 a single-chip version of the 1793, or am I out in Left
Field? The early Tandy controllers that required 12V were based on the
1793, and weren't the later 5Vonly ones based on the 1773?
I can't remember the numbers anymore... have to go home and look! ;-)
See ya,
Roger "Merch" Merchberger
--
Roger "Merch" Merchberger --- sysadmin, Iceberg Computers
Recycling is good, right??? Ok, so I'll recycle an old .sig.
If at first you don't succeed, nuclear warhead
disarmament should *not* be your first career choice.