#Emulator Sheepshaver Drivers As For#

Basilisk II is distributed under the terms of the GNU General Public License (GPL).This video talks about how to run Mac OS 9.0.4 in SheepShaver. However, you still need a copy of MacOS and a Macintosh ROM image to use Basilisk II. That is, it allows you to run 68k MacOS software on your computer, even if you are using a different operating system. Basilisk II is an Open Source 68k Macintosh emulator.

Emulator Sheepshaver Drivers As For

It's used directly by MacOS to store local variables and it seems that it's not easy to patch the rom to use other location. As you will remember you used a program called prepareemul or rsrvcold/warm to reserve the first kilobytes of memory for the mac emu. Keep in mind that before you begin, you will need a valid Macintosh ROM image to run an emulator. The Guides Setting up an emulator is easy, and there is a wealth of setup guides available to help you out. I might upload a Windows gui.Well, I know, why it doesn't work, but what I don't understand is, why didn't anyone fix it? All these emulators use drivers as for gfx so for sfx, so why?SheepShaver and Mac OS 9 run a lot of games from the 1980s and early 1990s, and Basilisk II runs many 1980s games with no problems.

It would be dead slow (yes, have you tried pc emus on pcs? they run FAR slower than the real thing).Your point 4 is exactly the same as my point 3. MAME requires cycle exact emulation and Mac emus for Amiga 68k or MOL/SheepShaver on Linux have more in common with virtual machines than with emulators.'emulate a PowerPC on a PowerPC should be less hard than it seens.'(lol) The idea of emulating a PowerMac emulating the entire cpu has no sense. And as Ralph Schimidt hasn't any interest in helping the MorphOS emu community and don't wants to allow developers to create new interesting apps (with Memory Management functions we would be able to port nallehpuh, puhderbaer etc and have PAULA emulation just like in Amithlon).Sorry Mr Schmidt, but this is disapointing.-edit- Remember that these memory functions are already available in OS4 for example and that will cause that we'll have less emulators and that the most interesting ones (like ppc mac for example) will never work on MorphOS.MAME is a completely different emulator and I don't understand how you can compare them.

So you emulator/VM is still glue to old stuff. For example, MOL needs a kernel module to work, so it can get these.Even if you have some kind of access to 0x0 -> 0x3000, it's only for 'old style' mac not for 'new World' one. But yes, slower than native stuff.By the way, the PowerPC has some complex instruction that should be hard to emulate on a x86 for example.But, I don't know/think we really have the choice.I was thinking that in order to emulate something like a PowerMac you need all the CPU functions, including supervisor mode, supervisor register, some kind of access to emlated physical memory.So if you emulate the whole CPU, you have all of that, whereas if you 'only' get MMU you still miss supervisor. That would be enough to have SheepShaver working, and 68k mac emus would be able to use directly memory, boosting perfomance.If we talk about MAC emus that use the cpu directly you will see that ALL of them use MMU, including SheepShaver(unless you have freed the first kilobytes, then it would be optional) and MOL'I guess that if the MMU API is not public there are several good reasons anyway.'ALL modern OSes have an API to manage memory, yes you could even do that in a standard way in OS3.x if you used MMU.library, you can do it in windows, beos, qnx, linux, amigaos4, macos, macosx and any OS that is not MSDOS.If there are good reasons I'd like to see a list.I don't think it would be dead slow. If there are functions available and documented then it's not hack.But we are talking about MOS here, we wouldn't need MMU if the first kilobytes were free for Mac emus.

Shapeshifter was more agressive with the OS and the MacOS ran in Supervisor mode because it patched exec.'So if you emulate the whole CPU, you have all of that, whereas if you 'only' get MMU you still miss supervisor. I think that Basilisk2 does the same on Amiga. But I think that adding MMU emulation would half the speed'I was thinking that in order to emulate something like a PowerMac you need all the CPU functions, including supervisor mode, supervisor register, 'If I remember correctly SheepShaver and MOL patch the MacOS ROM/Kernel to avoid the need of that so it runs in user mode. (there's some more in extended mode))Yes you need to provide a supervisor environment if you want to emulate a NewWorld architecture MacOS 9 might look old on the surface but there's a fully preemptive kernel in the background that runs the BlueTask (on new world macs) (this works similar to ABox on MorphOS).Low mem variables ain't the largest problem it's the speed issue, you can sure implement the whole system in software but it would be horribly slow.And yes you're correct that the Low Mem is only relevant to Old world style (which don't run MacOS X for that matter.)Old world style is also what sheepshaver emulates although it makes some trickery to reduce overheads in emulation.Having access to the MMU allows you to push time expensive task onto the hardware it can be the difference between a usable and an unusable emulator.'By the way, the PowerPC has some complex instruction that should be hard to emulate on a x86 for example.'SheepShaver already emulates a non-MMU 604. The problem as I see it is that the PowerPC (32 general purpose registers) has an tremendous amount of registers and the x86 has few (about 8 base registers if I remember correctly. Emulator are slower (I don't think it would be that slower on the same CPU) but more OS/hard independantPS: I'm not a low-level CPU/OS specialist so I may be wrong, but that's only my mind.It would be very slow to emulate the PowerPC on the PowerPC.Regarding the PowerPC having complex instructions that sohuld be hard to emulate on the x86 care to give any examples, I'm not aware of any complex instructions that could be tricky to emulate.

It runs but some features may be missingI hope they integrate it more with the Basilisk2 sources and that they add support for MacOS 9. That should make it more user-friendly to build & get something working with MacOS 8.6 out-of-the box.Sources (CVS snapshots) + precompiled binaries as RPM: Files: SheepShaver-2.2-20040224.tar.bz2, SheepShaver-2.2-10.*.rpmImproved generic JIT, also now translates FPU instructionsAltiVec emulation, thus enabling the PVR to match a 7400 (G4)Partial port to Darwin/PPC, i.e.

Mac Emulator Sheepshaver