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From: paulr@syma.sussex.ac.uk (Paul T Russell)
Newsgroups: comp.sys.mac.programmer,comp.sys.mac.system
Subject: Developing software for ancient Macs
Message-ID: <3635@syma.sussex.ac.uk>
Date: 17 Oct 90 14:37:11 GMT
Sender: paulr@syma.sussex.ac.uk
Organization: University of Sussex
Lines: 24

I have an 'interesting' problem. I need to write some
software which will run on an original Mac 512 (well,
over 100 of them actually, which is why it's not possible
to upgrade to something newer). The application must reside
on the (400k MFS) system disk and everything must obviously
fit into 512k RAM. So what I need to know is:

1 What version of system software should I use ? I have all
  of them on a CD-ROM but I'm not sure which one is the
  newest usable version for a Mac 512.

2 The application will probably have to be written in Pascal.
  Obviously I can use a slightly more modern Mac for development,
  but will THINK Pascal (or any other Pascal compiler) generate
  code which will run OK on these antique machines ? I seem
  to remember some changes to do with the Segment Loader and
  attributes on CODE resources when the Mac Plus came along...

3 Is there anything else which I might have problems with ?
  Obviously I won't be able to use anything more recent
  than Inside Mac I to III, but is there anything else
  which might cause problems ?

//Paul