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- Short: Virtual Memory for AmigaOs
- Author: thor@math.tu-berlin.de (Thomas Richter)
- Uploader: thor@math.tu-berlin.de (Thomas Richter)
- Version: 40.1
- Type: util/libs
- Requires: Os 2.04, a 68020/68851, 68030, 68040 or 68060 with a working MMU
-
- -----------------------------------------------------------------------------
-
- Contents:
-
- This archive contains the binaries only. No sources or manuals are included
- whatsoever. You'll find example code, include files, manuals and more
- information in the "MemManual.lha" archive, on Aminet.
-
- -----------------------------------------------------------------------------
-
- Purpose and goal of the memory.library:
-
- The memory.library is the second step stone of the mmu.library project. The
- purpose of this library is to provide virtual memory for the AmigaOs
- environment. The requirement for making the memory.library working is to
- install the mmu.library.
-
-
- What does the memory.library, and what not?
-
- The memory.library is *not* a system patch in the spirit of VMM or GigaMem.
- It will not provide virtual memory automatically to old programs. The AmigaOs
- is not prepared to handle this kind of virtual memory due to certain re-
- strictions arising from access exception handling. However, "virtual memory
- on demand" is possible - that is, programs are able to allocate virtual memory
- from this library, and make use of it. These programs need not to care about
- how memory is swapped in or out, this is done automatically. The only
- additional step that is required to make use of virtual memory is to allocate
- it from the memory.library directly rather than from exec, plus some safety
- rules how to use this memory. A transparent patch to the system to make
- virtual memory available to all applications automatically is *not* possible,
- and is neither the intention of the memory.library at all.
-
- The memory.library requires the installation of the mmu.library as it is
- build on top of it. You are also encouraged to use the MuLib provided
- 68040 resp. 68060 libraries as they handle virtual memory more careful than
- other implementations. The "SwapTest" program in the Examples directory
- should be run to find out whether the cpu support library you're using is
- prepared for virtual memory.
-
-
- About the mmu.library:
-
- The mmu.library is a basis for MMU (memory management) related functions the
- MC68K family can perform. Up to now certain hacks are available that program
- the MMU themselves (Enforcer,CyberGuard,GuardianAngle,SetCPU,Shapeshifter,
- VMM,GigaMem...).
- It's therefore not unexpected that these tools conflict with each other.
- There's up to now no Os support for the MMU at all - the gap this mmu.library
- fills.
-
- The goal is to provide a basis of functions to address and program the MMU in
- a hardware independent, Os friendly fashion. Hence, the new version of the
- Enforcer, called MuForce, will work together with virtual memory, and others.
-
- The mmu.library is also the basis for this virtual memory project, the
- memory.library. Even though the mmu.library does not provide virtual memory
- itself, it builds the basics to allow an easy implementation and to avoid the
- hacks required by other implementations so far.
-
-
- Thomas Richter,
-
- February 2002
-