Re: 6 & 2 / 5 & 3 Encoding

[dempson@atlantis.actrix.gen.nz (David Empson)]

In article <xray-0902951659270001@129.64.112.74>,
Nathan Raymond <xray@cs.brandeis.edu> wrote:
> 
> All of the Smartport info you need is in the Apple //c Technical Reference
> Manual.

If you are referring to this manual, make sure you use the second
edition (the one that also covers the IIc+).  There have been several
revisions to the SmartPort interface, and the original IIc manual has
many errors and missing details.

The "official" reference for writing a SmartPort interface consists of:

- Apple IIgs Firmware Reference
- Apple IIgs Firmware Reference Update for 1MB IIgs (some new SmartPort
  calls are defined here and nowhere else)
- the SmartPort technical notes (TN.SMPT.xxx).

> The //c had smartport built in, and it was an optional board for
> the IIe (which probably worked in the IIgs too).

If you mean the "Liron" card (the UniDisk 3.5 Controller Card for the
II+/IIe), then no, it doesn't work in the IIgs.

There isn't much need for it, since the IIgs has a much better
SmartPort implementation built in.  The newer Apple 3.5 Disk
Controller Card (alias "SuperDrive Card") works in the enhanced IIe
and IIgs.


-- 
David Empson
dempson@actrix.gen.nz
Snail mail: P.O. Box 27-103, Wellington, New Zealand