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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: brianb on March 02, 2009, 05:34:38 PM

Title: Blizzard 1230 MK IV disable question?
Post by: brianb on March 02, 2009, 05:34:38 PM
I know I can press "2" on start-up to disable the accelerator.  Also to Hold Ctrl-A-A for 10 seconds to re-enable it after reboot...

But...

Is there a way to disable the the CPU (68030) while still allowing me to use it as a RAM expansion board?   Another key to hold down, or maybe something BlitzKick could do?  Or is it simply not technically possible?

I have a few apps that don't seem to like the CPU but I still need the ram to start them up...

Thanks
Title: Re: Blizzard 1230 MK IV disable question?
Post by: AndyC on March 03, 2009, 12:58:04 PM
I'm pretty sure it isn't possible...

What compatibility issues are you having that require you to disable the 030 only?

AndyC
Title: Re: Blizzard 1230 MK IV disable question?
Post by: jj on March 03, 2009, 01:34:06 PM
Its impossible.
Title: Re: Blizzard 1230 MK IV disable question?
Post by: Miloo on March 03, 2009, 02:22:06 PM
I thought about that with mine but the 68020 can only have I think a limit of 8Mb of ram.
Title: Re: Blizzard 1230 MK IV disable question?
Post by: brianb on March 03, 2009, 09:26:46 PM
Quote

AndyC wrote:
I'm pretty sure it isn't possible...

What compatibility issues are you having that require you to disable the 030 only?

AndyC


I have a couple demos that seem to act "funny" when on the 68030.  They're WHD demos so maybe I could tweak that.  Wish I had the name of specific demo, but I'm at work...  The WHD author did mention some compatibly with faster machines, and said maybe he'll work on a better WHD loader in the future.  (guess that never happened)

Thanks for the help though, I thought it probably isn't possible but worth asking..
Title: Re: Blizzard 1230 MK IV disable question?
Post by: rkauer on March 04, 2009, 05:23:33 AM
 On the Early Startup Control screen, select "disable CPU caches".

 Click boot and that's it.