Re: Apple IIGS motherboard in an Apple IIe case

["Polymorph" <polymorph69@hotmail.com>]

On Mar 14, 10:13 pm, demp...@actrix.gen.nz (David Empson) wrote:
> Polymorph <polymorp...@hotmail.com> wrote:

-snip-

> It is not possible. The ROM 3 IIgs has removed all of the hardware
> support for a IIe keyboard. You would have a dud built-in keyboard and
> would require an ADB keyboard.

I suspected as much...

> In the ROM 00/01 IIgs, it is a function of the keyboard microcontroller
> (which also controls the ADB). The IIe keyboard has one other
> limitation: even in a later model IIe with built-in numeric keypad, IIgs
> software which is aware of the numeric keypad can't distinguish it from
> the main keyboard, so some special functions that use the numeric keypad
> won't work.

I haven't come across this limitation yet, but as mine is used
primarily for my daughters games, it is not surprising. Thanks for the
info though.

> If you want to use a IIe mouse card, the ROM 3 won't support it in
> 16-bit software (it requires an ADB mouse) but it would work with 8-bit
> software.

I would recommend using an ADB mouse any how, if only to free up an
additional slot (and use less power?).

> I don't know if the mounting positions differ, but you need a different
> baseplate to install a ROM 00/01 motherboard in a IIe anyway (the
> connectors on the back are different), unless you do a fair amount of
> drilling and cutting.

The IIgs motherboard does require you add mounting brackets onto the
baseplate in different positions to the //e motherboard. As for the
back, I cut out the required section of the baseplate to accommodate
the IIgs connectors, and drilled two 10mm holes for the composite
video and ADB mouse sockets.

cheers,
-p