Installing AmigaOS4.1 Classic onto WinUAE 2.9.0beta12

When I saw that WinUAE was to the point of actually installing OS4.1 Classic, I immediately put in an order to to get my copy. I ordered on Friday and it arrived Monday, just 3 days later. That’s UK->US in 3 days and I didn’t specify rush shipping at all! Good job AmigaKit!

The disc was actually the base install with Update 2 integrated (there have been 6 updates, plus the AmiUpdates that have been online only since update6). I first made an ISO as I find that is much easier than using a real disc with WinUAE.

Just setting up, I had to do the following:

Got the latest “official” beta version of WinUAE (not the quick fixes he posts sometimes). At the time of this writing, it was WinUAE_2900b12 (from this post): There may be a newer one by the time you read this.

Then, I had to download the PowerPC ROMs from the Zone! area on EAB. Just go to, do a search for getting access to the zone. The file was called by Toni Wilen. Extract this to the same place where the normal Amiga ROMs go. I also copied the 44.69 version of both blizzardPPC and cyberStormPPC files to ones without the version (i.e. bizzardppc.rom and cyberstormppc.rom). Also, go –> here , to download the file called, extract the single file in it, copy to the same roms folder as the rest, and rename the bin file to “picasso_iv_flash.rom.

Now, go to this thread here here <– and follow the Guide exactly. This was written for OS4.0 but I found it worked with OS4.1.

The only difference I found was that I unchecked the JIT Z3 memory option in the RAM section. I had read that it was very problematic in earlier versions of WinUAE.

Here are some pictures of my boot / install screens:

I missed the part about skipping the “Run Media Toolbox” and “Format Disk(s)” screen and clicked the Media Toolbox button. The emulation just sat there so I reset WinUAE and when I started back into the install, I got an RTG screen which was much easier on the eyes. Here are some images for the final stages of the install

Install took a VERY long time.

In the end, I had my AmigaOS4.1 Classic emulated environment. After the initial install, I shut down WinUAE and made a backup copy of the hdf file in case something messed up later. That install took too long to do again.

Now, I need to test what does and doesn’t work, as well as patiently wait for Toni to get the JIT QEMU PPC Core replacement so we can see some real speed! [This version seems a bit fragile so far]

Good Job Toni and Hyperion!

(p.s. Post-Install images):


12 responses to “Installing AmigaOS4.1 Classic onto WinUAE 2.9.0beta12

    • There is an adf of the boot floppy on the CD. Just copied that to my windows hard drive and selected it for the df0 drive for the install

      • Ok, found the MakeBootFloppy skript on my OS4.0 Classic CD and created the boot floppy.

        Now I am waiting for the intial screen and it really takes a long time for the black screen to disappear…

      • You don’t need the script…. in the base of the AmigaOS4.1Classic CD, there is a folder called BootFloppy. Inside of that, there is an lha compressed version of the ADF you want.

        The filename is Boot_Floppy.adf.lha

        Just extract that to your windows side somewhere. I use WinRAR and it can extract from an lha file.

  1. Did you get networking/internet accerss working?

    If so, can you provide a few screen captures explaining what’s required?

    • I will be making an updated post soon that will include networking details as well as updates to making it run full screen, hi-rez on my laptop.

      Thanks for reading!

    • Sorry for the late response. I have yet to jump back into OS4.x emulation world. I know others have figured out how to make dynamic CD loading work, but the last time I tried, I just had to make an ISO image of the CD / DVD I wanted to load up, add it in WinUAE as an image on the built-in Cyberstorm SCSI accelerator port number 1 (number 0 was the harddrive image). I then had to start the system again and it was there when it came up. Toni Wilen is working on a new UAE harddrive controller that works with folders on the native Windows side that should allow better flexibility than ISO images. I haven’t checked into it in a while Check on under the WinUAE support forum. V3.3.0.0 is where the experimentation is happening.

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