Re: EDD Plus Card

["William Garber" <willy46pa@garberstreet.com>]

"Michael J. Mahon" <mjmahon@aol.com> wrote in message lcudnf5GWvCJLqHanZ2dnUVZ_sytnZ2d@comcast.com">news:lcudnf5GWvCJLqHanZ2dnUVZ_sytnZ2d@comcast.com...
: Scott Alfter wrote:
: > In article <473c6957$0$19735$4c368faf@roadrunner.com>,
: > Bryan Parkoff <nospam@nospam.com> wrote:
: >
: >> Do you know where I can find to buy EDD Plus Card?
: >> It is rare and not found on eBay.
: >>
: >> Info on http://www.apple2info.net/hardware/edd/edd.htm
: >
: > At this point, it'd probably be easier to build your
: > own than to wait for one to turn up on eBay.  The page
: > you linked includes a reverse-engineered schematic;
: > all that would remain would be to do the layout, board
: > fabrication, and assembly.
:
: Although the "schematic" given is more like a "pictorial"
: than a schematic.  It requires conversion to a conventional
: schematic with logic symbols to understand what's going on.

Which I have planned, someday, once I get everything I have
on my plate done, and straightened out.

: My understanding (without having done the step above)
: is that it is simply a shift register, sampling all the
: read data at 2MHz (?) so that the program can interpret
: the complete data stream, including all zero bits.

Everything that goes with the board is included on the site.
Download it all and it explains basically what it is doing.

William Garber
Email Address - willy46pa@garberstreet.com
Alt. Email - willy46pa@comcast.net
Web address - http://www.garberstreet.com