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Old 02 September 2021, 21:55   #5
SpeedGeek
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Join Date: Dec 2010
Location: Wisconsin USA
Age: 60
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Quote:
Originally Posted by pipper View Post
MMULib comes with a tool that uses a different approach: use the MMU to map the VBR to fastmem, but leave its virtual address at 0.
This should give best of both worlds. Backwards compatibility for programs expecting VBR at 0, yet have it in fastmem.
Apparently, you didn't read this comment:

https://eab.abime.net/showpost.php?p...5&postcount=13

The MMUlib does not use the simple "Ad Hoc" solution of just remapping the Zero page. It uses a more "Complex" solution which may solve one compatibility problem at the expense of another.

FYI, The AmigaOS CPU "FastRom" command (up to OS 3.9) will move the VBR into Fast RAM on 020-030 with MMU systems but won't move it back to Zero if it's disabled.

Last edited by SpeedGeek; 03 September 2021 at 00:04.
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