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#81 |
Registered User
Join Date: Dec 2013
Location: Lake Havasu City, AZ
Posts: 741
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I don't think people understand how emulations work.
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#82 | |
Registered User
Join Date: May 2017
Location: Munich/Bavaria
Posts: 2,425
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Quote:
"FUSION *requires* a MMU when you are using a 68030 or later, OR the CPU can fault out correctly and continue with an EC030." Now I get it - thanks for the clarification. |
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#83 | |
Registered User
Join Date: Aug 2020
Location: Australia
Posts: 1,018
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Quote:
According to michalsc, Emu68's 68040 MMU feature is WIP. |
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#84 |
Registered User
Join Date: Dec 2013
Location: Lake Havasu City, AZ
Posts: 741
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I have been in contact with Michal about this issue in recent days. The problem was actually discovered by him probably a year ago now. The Mac on boot up starts poking at the FPU and MMU to determine what types are being used. The 68020 Macs use the 68851 and the 030/040 had different MMU configurations. The only way to know what you are really using is by doing various instructions. This process causes EMU68 to crash. So, I need to go back in history (Discord) and find the screenshots that Michal made showing the issue - which at the time he said he zero interest in supporting. That apparently has changed if I can help him pin-point the issue(s). So, that's good news.
Of course, having a real (or correctly emulated) MMU is the way to go as that guarantees extremely high compatibility. It's the reason why FUSION runs so fast and stable on real hardware (and WinUAE). |
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