Problem with Apple IIgs video (Australian version?)

["Simon Biber" <simon@basilisk2.cjb.net>]

My IIc has the US style as described in David Empson's post below. It
outputs NTSC compatible with my Platinum IIe and AppleColor Composite
Monitor.

On the other hand I picked up a ROM 3 IIgs whose output is not compatible
with that monitor. It travels vertically, flickering in two spots on the
monitor, and no colour is shown. It does sync fine on my PAL TV, but there's
no colour there either. Is there is some setting wrong either in the IIgs or
the monitor? (Monitor unlikely as it works fine for my Platinum IIe and
IIc.)

Simon.





"David Empson" <dempson@actrix.gen.nz> wrote in message
1eo9epx.p026nt1cht2tfN%dempson@actrix.gen.nz">news:1eo9epx.p026nt1cht2tfN%dempson@actrix.gen.nz...
> Matthias S�llner <soellner.matthias@t-online.de> wrote:
>
> > Can anyone tell me the difference between the german and the us version
> > of the apple iic? Which chips are different? Is the ROM the same?
>
> The differences are covered in the IIc technical reference.  I have a US
> IIc (and I've seen inside it), and I've also seen the International
> English version.
>
> The most obvious difference is the keyboard layout.  The US keyboard has
> the left and right shift keys the same width, a horizontal rectangular
> return key, and a half width caps lock key below the left shift key.
>
> The International keyboard (based on the ISO layout) has a reduced width
> left shift key, a full width caps lock, and a vertical return key
> (rectangle with a notch cut out on the lower half of the left side).
>
> The key that is above the return key on the US keyboard (backslash and
> vertical bar) moves down to the bottom row between the left shift key
> and first letter on the bottom row (Z for the US keyboard).  The key
> that was to the right of caps lock (reverse quote and tilde) moves to
> the left of the return key, on the same row as the control key.
>
> The next difference is the layout and symbols on the the individual
> keys, which are rearranged for convenience of the local language.  (I
> can provide details if anyone cares.)
>
> The switch above the keyboard with the keyboard icon toggles between the
> local and US keyboard.  For the US version of the IIc, this switch
> toggles between QWERTY and Dvorak layouts.
>
> The other differences I'm aware of:
>
> - Power supply "brick" input voltage and a frequency will be appropriate
> for each country (220/240 V at 50 Hz or 110 V at 60 Hz).
>
> - Video output will be PAL instead of NTSC.  This affects several
> components on the motherboard, requiring a different IOU and timing
> chips.  It probably also involves a different motherboard.  The master
> crystal frequency is slightly lower for PAL, which means the
> International IIc runs a little slower than the US model.
>
> - The character generator and keyboard decoder ROMs are different.
>
>
> The main firmware ROMs will be identical to the corresponding revision
> of the US IIc.