Re: Uprgading IIgs

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

Mitchell Spector <spec@vax2.concordia.ca> wrote:

> In article dempson@actrix.gen.nz (David Empson) writes...
> 
> >(Incidentally, Apple Australia pulled a really nasty trick with the
> >memory card: instead of Apple's 1MB card with 256KB preinstalled, they
> >had their own small 256KB card that was not upgradable.  You had to buy
> >another card to upgrade the memory, resulting in a lot of completely
> >useless spare 256KB cards around Australia and New Zealand.)
> 
>     Interesting bit of trivia, never heard that one before. Were these
> cards official Apple products (with an xxx-xxxx-xx product label code)
> or 3rd party manufactured specially for those sold in AU/NZ.

I don't have the card any more - I lent it to someone who had a ROM 1
IIgs with no memory card at all!

The box says "Made in Australia"; the back has Apple Australia's
address.  The packing list says the part number is A661-0256.

> >If you use pre-System 5.0 on a ROM 1, you lose the major speed benefits
> >that were introduced to QuickDraw in System 5.0, so that doesn't help.
> 
>     Yep, if you run older ProDOS 16 software (e.g. System 3.1) the newer
> version of QuickDraw is read and used from ROM, so when you scroll windows
> and move graphics around they are as quick as under System 5.

I assume you mean "if you run ... on a ROM 3 IIgs, the newer ...".

ROM 1 contains toolsets from System 2.0.

The ROM 3 is not entirely compatible with pre-5.0 systems, though 4.0 is
pretty safe.  Older versions are less stable (most often this is due to
applications that come with older versions of ProDOS-16 making
inappropriate assumptions about toolsets, and bumping into changes
introduced in System 5.0 and the ROM 3).

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