Apr 04, 2013 Since many amigans still have their 1200 in its original desktop case and a CDROM isn't present, I thought of uploading a quick video of how to install 3.9 using only a CF card and an 3.9 ISO. Jun 17, 2016 First steps: Use a m68k emulations setup - line AmigaOS 3.9 - to download the archive linked above to a hard file shared with your AmigaOS 4.x setup. Installation: Start your AmigsOS 4.x setup. Open the shared hardfile and double.
ROM space is very tight for this release on account of the much larger mass storage drivers (SCSI, IDE) and the integrated OCS/ECS/AGA graphics.library.Commodore was already pushing the limits for the 1994 Kickstart 3.1 in the Amiga 1200 ROM, and it only got worse. The Amiga 4000T ROM would no longer contain workbench.library either (in 1994) because the graphics.library and the SCSI driver took up so much room.
There is no room for workbench.library and icon.library in the 512 KB 3.1.4 ROM. Going back to a previous set of workbench.library/icon.library versions is not an option because these do not fit either.
1 MB ROMs are not viable solution at this point. Only a select few models support these, and the point was to make the 3.1.4 update available to all desktop systems.
Besides, a 1 MB ROM would require retooling of the build process for the operating system, which we did not attempt. The last 1 MB ROMs were built in 1994 (for the CD32) and very little documentation survives on how this is done, and how the ROM images need to be prepared.
We were already quite busy with the desktop systems and chose not to spend the time on research and QA work necessary for the 1 MB ROM build.