RE: (Fwd) RE: 1541IDE and 1541IDE-S
Date: 2007-12-11 07:41:08

Hallo Jim,

> Just thought I'd check.  If no one is interested,

I am interested. But Silverdream offered to make them as well. So before
two parties are going to make them, please sort that out between the two
of you.

> Now, Ruud's schematic he sent me differs from the one on the
> web site, as this one has a 62256 and a 6116.

For the others: I sent Jim by accident an unfinished design from my work
because I was not able to access the Intenet from home. These RAM's are
NOT needed. And Jim, if you want to make the design smaller: ommit the
buffers! (But make sure to use a short IDE cable)

Remark: for one of my projects using this interface, extra RAM is
mandatory. But it is quite simple to piggyback a 6116 on top of the
original one and to connect its CS line with one of the free outputs of
the 7442. OK, this just adds 1 KB instead of the full 2KB but it is more
then sufficient.

> I thought I might see if I could extend the design to
> do 16 bit transfers without too many more ICs.

And this one works as well! I'll send you the SCH in a PM. But read for the details why I don't
want to use it for the moment.
If you have a good look at the design, you'll see where the 62256 in
your SCH originates from: just a leftover of this one :)

    / __|__
   / /  |_/     Groetjes, Ruud
   \ \__|_\
    \___|       URL:


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