trying NOT to/avoid MMU-remap zero page

jotd · 29 April 2018, 16:03

Blizzard 060 board libs/startup seem to remap the zero page (a bit like MuFastZero does, except that MuFastZero refuses to operate in those conditions because the zp is already remapped)

When doing a huge cleanup in JST, I've removed some clunky MMU code (now targetting lower configs), and I'd like to remove this remap by an external program before running it.

On my real A1260 some games crash, some don't. That reminds me the time when Ralf didn't have inserted MMU code yet. But I don't want to go down that road again (the code is not integrated directly into JST)

So I'm looking for some tool to do that (some asm code to unmap/remap would be cool to, I could re-attempt to integrate it into JST in a clean way)

daxb · 29 April 2018, 16:20

Did you tried mmu.library and its 68060.library? Do the games still crash? Only to check/know if the CPU library is responsible or to blame.

I can't help with the zero page remap undo.

jotd · 29 April 2018, 17:48

I remember trying that at the time and could not make it work like at all.

29 April 2018, 16:03	#1
jotd This cat is no more Join Date: Dec 2004 Location: FRANCE Age: 52 Posts: 8,168	trying NOT to/avoid MMU-remap zero page Blizzard 060 board libs/startup seem to remap the zero page (a bit like MuFastZero does, except that MuFastZero refuses to operate in those conditions because the zp is already remapped) When doing a huge cleanup in JST, I've removed some clunky MMU code (now targetting lower configs), and I'd like to remove this remap by an external program before running it. On my real A1260 some games crash, some don't. That reminds me the time when Ralf didn't have inserted MMU code yet. But I don't want to go down that road again (the code is not integrated directly into JST) So I'm looking for some tool to do that (some asm code to unmap/remap would be cool to, I could re-attempt to integrate it into JST in a clean way)

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29 April 2018, 16:20	#2
daxb Registered User Join Date: Oct 2009 Location: Germany Posts: 3,303	Did you tried mmu.library and its 68060.library? Do the games still crash? Only to check/know if the CPU library is responsible or to blame. I can't help with the zero page remap undo.

29 April 2018, 17:48	#3
jotd This cat is no more Join Date: Dec 2004 Location: FRANCE Age: 52 Posts: 8,168	I remember trying that at the time and could not make it work like at all.

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