Re: Apple floppy adaptor. I'm stuck!

["Michael J. Mahon" <mjmahon@aol.com>]

Tristan Mumford wrote:
> bieling@terra.es wrote:
>
>
> > On Feb 17, 2:03 pm, Tristan Mumford <xtristan.xmumf...@xgmail.xcom>
> > wrote:
> >
> > > Oh. I'm surprised. The datasheet I grabbed for it from alldatasheet said
> > > it was a schottky. Maybe I was looking at the wrong sheet. Still, ancient
> > > thing.
> > > Tristan.
> >
> > I'd keep an eye on the output drive figure because it seems to be
> > pretty low for standard TTLs, as you can see here:
>
>
> I wonder if thats why the serial communication was so lousy on my C64 serial
> interface. I was feeding the signal through twice for a noninverting
> buffer.
>
> > <http://www.geocities.com/dsaproject/electronics/data_book/
> > ic_technology.html>
> >
> > Don't know what's connected to it's outputs... ?
> > I'm missing my TTL CookBook now !
>
>
> Can't help there. I only have my CMOS Cookbook for reference :)
>
> Its outputs have /WDATA (to pc floppy) RDDATA (to a2) WPROT (to a2) on them.

I'd presume that they each present little more than one or two TTL
loads.

> Anyway, once I finish turning my nice neat little board into a big mess to
> connect a board with the 18f452 on it I can continue on. And after I put in
> a better hex inverter if I can find one in my junk that is.

A quad NAND or NOR gate would do nicely, too.

-michael

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