Re: NadaNet for the //c - just an idea

[BLuRry <brendan.robert@gmail.com>]

On Aug 26, 2:14 pm, "Michael J. Mahon" <mjma...@aol.com> wrote:
> Ferdinan Meyer-hermann wrote:
> >   To: mdj
> > mdj wrote:
>
> >> On Aug 26, 1:51Â pm, BLuRry <brendan.rob...@gmail.com> wrote:
> >>>>> The good news is that it now appears that WRPROT will do the
> >>>>> job as long as the state machine is left in the "shift in
> >>>>> WRPROT" mode.
> >>>> It's worked fine for me in the past, but then, I wasn't attempting to
> >>>> use anywhere near the bandwidth nadanet requires (ie. flat out!)
> >>> What about the serial port? Â Can you just use the DSR (pin 5) for
> >>> input and DTR (pin 1) for output?
> >> I wouldn't know if they were configurable at that level - I've always
> >> been a well-behaved programmer and used the firmware interfaces,
> >> despite their reputation for being awful
>
> > They are, actually. At least to some extent.
> > But that requires more CPU cycles than the disk port, since the signal is
> > not available at bit 7 (it is in bit 6) and sending requires not just
> > banging a softswitch, but writing to a register.
>
> I really need it in bit 7...
>
> And having to set up a value to store in a register would be
> a timing problem.
>
> > The Dx-19 connector is going to become a problem, but at least I can still
> > use a "shortened" DB-25 connector.
>
> If I can find Dx-19 connectors with hoods, the adapter will fit
> inside the hood, with an RCA sticking out the back.
>
> > About who plans to use NadaNet on the //c: I do...
>
> OK, I'll keep that in mind!
>
> -michael
>
> AppleCrate II: An Apple II "blade server"!
> Home page:  http://members.aol.com/MJMahon/
>
> "The wastebasket is our most important design
> tool--and it's seriously underused."

Male DB19 connector, $1.58: http://www.connectworld.net/cgi-bin/hello-cables/DB19MS
DB19 hood, $1.61: http://www.connectworld.net/cgi-bin/hello-cables/DB19H