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Atari coding BBS
| Re: Disabling 68030 PMMU + caches |
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Posted by: ggn
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Feb,09.2012-19:22
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> I think it works because it's actually disabling the PMMU, it doesn't move the PMMU table to another address.
> Bit 31 in the tc register controls PMMU on/off.
> When you write an address into that register, bit 31 will be zero. The PMMU will be disabled and everything else is ignored.
Well, my memory is a bit hazy on this, but I remember a few times when some game code would overwrite the PMMU copy I installed and the machine would go haywire! Although some tests would be in order to be sure...
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Topic
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Posted by
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Date
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Disabling 68030 PMMU + caches
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Klaz
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Feb,07.2012-10:55
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Re: Disabling 68030 PMMU + caches
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mikro
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Feb,07.2012-17:52
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Re: Disabling 68030 PMMU + caches
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Klaz
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Feb,07.2012-18:27
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Re: Disabling 68030 PMMU + caches
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ggn
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Feb,07.2012-19:28
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Re: Disabling 68030 PMMU + caches
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Klaz
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Feb,08.2012-09:35
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Re: Disabling 68030 PMMU + caches
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ggn
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Feb,09.2012-19:22
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Re: Disabling 68030 PMMU + caches
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mikro
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Feb,08.2012-12:08
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Re: Disabling 68030 PMMU + caches
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Klaz
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Feb,08.2012-13:44
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Re: Disabling 68030 PMMU + caches
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mikro
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Feb,08.2012-17:23
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Re: Disabling 68030 PMMU + caches
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Klaz
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Feb,09.2012-09:17
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Re: Disabling 68030 PMMU + caches
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sqward
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Feb,09.2012-16:01
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Re: Disabling 68030 PMMU + caches
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Klaz
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Feb,09.2012-16:37
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Re: Disabling 68030 PMMU + caches
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mikro
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Feb,10.2012-10:31
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What's the anti-troll code?
That's your personal code to be able to add comments and messages on the dhs.nu site.
Don't have a code or forgot it? Fix it here.
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