Re: ADT under Apple II emulation on Apple III?

[scott@alfter.DIESPAMMERSDIE.us (Scott Alfter)]

In article <8d9cb28a-c16c-4e30-97b5-82c092c28396@b40g2000prf.googlegroups.com>,
N.N. Thayer <nnthayer@hotmail.com> wrote:
>I've been trying to get ADT to work on my III under II emulation.
>Nutty, I know, but the only reason I'm even trying is because I saw
>configuration options for the III's serial port in the II emulation
>control panel, and that made me hopeful.  Seemed pretty cut-and-dried
>- set the speed and the type of card (SSC), and you'd be good to go...
>can't seem to get the serial port detected under ADT though.  Is there
>anything I might be missing, or am I just SOL?

If ADT is like most Apple II comm programs and twiddles bits on the 6551
directly, the III's SSC emulation would have to extend down to the hardware
level (which would put the 6551's registers at $C0x8-$C0xB, for values of x
from 9 to F inclusive).  If it doesn't do that and instead only emulates the
functionality of the SSC firmware (which normally is only used for
printing), it's not going to work.

If the Apple III uses the 6551 for its serial port, though, then it should
be possible to add support for it.  ADT includes support for both the SSC
and IIGS serial ports, and they're based on completely different hardware;
adding Apple III support should be a matter of tweaking the SSC driver a
bit.

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