Re: Zip- GS Slot Settings

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

Michael Guitton <webmaster@cardshow.com> wrote:

> I don't remind the exact differences between ROM 01 and ROM 03 regarding
> AppleTalk activation. Is there a way to activate AppleTalk on a ROM 01
> without loosing the Slot 7 (My RamFAST is already in slot 2, my 40MB
> InSyder is in slot 7 -- was thinking of the DYN_SLOT_ARBITER)?

DYN_SLOT_ARBITER does not work and never has.

You cannot get AppleTalk in a ROM 01 without setting slot 7 to
"AppleTalk" and either slot 1 or 2 to "Your Card".

In a ROM 3, you must set either slot 1 or 2 to "AppleTalk".  Slot 7 can
stay as "Your Card" (you can also set slot 7 to "AppleTalk", but this
wastes a slot, and is only for compatibility with brain-dead software
that thinks the IIgs AppleTalk firmware is always in slot 7).

In theory, you could use AppleTalk under GS/OS without going near the
slots.  (There may be hooks through the slot firmware for some
functions, but most stuff goes through bank $E1 vectors.)  ProDOS-8
wouldn't be able to use AppleTalk unless you have the slots set
correctly.

> Would it be possible to emulate the ROM 03 slots functionalities on a ROM
> 01 -- unless hardware components are needed to achieve this?

It is mainly a software issue, but it is not feasible to change this
without breaking the system software and lots of applications.

> (I think there's an improved ADB ROM on the ROM 03 motherboard, right?).

The ADB microcontroller has different firmware.  It dropped support for
the IIe keyboard scanning, and added Easy Access (sticky keys and
keyboard mouse).  It also automatically supports the Caps Lock light on
extended keyboards, and I think it supports faster mouse acceleration.

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