Re: FocusDrive and Interrupts

[mdj <mdj.mdj@gmail.com>]

On Nov 2, 4:39 am, dog_...@macgui.com (D Finnigan) wrote:
> mdj wrote:
>
> > What you probably want is a IIgs or IIc reference manual that covers
> > the SmartPort API.
>
> Great. :-) My available technical documentation essentially ends with the
> enhanced IIe. I can count on zero fingers the number of tech ref manuals
> that I've got for the IIc (Plus) and IIgs. But I've got user documentation
> for those two machines. How helpful!

You'll find what you need in either the IIgs Firmware Reference or the
later IIc Tech Ref, both of which Sheppy sells.

There was a 'protocol converter' addendum manual which covered the
upgraded IIc ROMs that also has it.

Are you planning a 'dd' style command for your multitasking OS ?

> > In case the naming is confusing, SmartPort is not just the disk port
> > on the back of a //c onwards Apple II, it also specifies a standard
> > API through which Block (and Character) devices communicate with the
> > host OS.
>
> Yeah, I saw that when I used the Slot Scan 1.62 program, the FocusDrive was
> identified as SmartPort Device (Error #39).
>
> By the way, does anyone know what Error #39 means? It's come up in this
> group before, and also with a FocusDrive, but it was never explained.

As Antoine said, it's an IO Error if that's #39 decimal. Otherwise,
it's a device specific return code.

SlotScan is probably sending device specific SmartPort control codes -
I suspect to determine if the target device understands the SmartPort-
>SCSI encapsulation method, or perhaps if there's a UniDisk 3.5"
attached.

> > It was called Protocol Converter in the original //c UniDisk
> > implementation. Googling on that may turn up some additional
> > documentation you might find interesting.
>
> Thanks; I'll look around.

Anytime.