![]() On Leopard hosts these areas can land on the same addresses SheepShaver needs, so SheepShaver's memory allocation fails. The result is the SheepShaver memory address space already contains libraries, fonts, Input Managers, and IOKit areas. By the time SheepShaver does its memory allocations, the Cocoa application has already started. The normal configuration is for SheepShaver to run under SDL, which is a Cocoa wrapper. If it is running in "Real" addressing mode, and can't allocate at address 0, then it was hard-coded to allocate the RAM area at 0x20000000. SheepShaver allocates RAM at fixed addresses. The symptom is error "ERROR: Cannot map RAM: File already exists". Some users have been unable to run SheepShaver on OS X 10.5 (Leopard) hosts. It also relaxes the 512 MB RAM limit on OS X hosts. This affects when a new NVRAM file is used, or when it is initialized after doing zapping the PRAM.Īdd prefs option to ignore illegal instructions (ignoreillegal)Īttached is a patch to SheepShaver to fix memory allocation problems when OS X 10.5 is the host. Note: This is supposed to be the default in OS 7.5. ![]() The fix is to have SheepShaver initialize the NVRAM to use the PPC memory manager. They don't support the 680x0 version, so they force the PPC version to be used. Later Mac OS versions don't have this problem. ![]() OS 7.5 is supposed to be able to use either one, but for some reason SheepShaver crashes on boot if the 680x0 version is used. One of the bytes in the xPRAM portion of the NVRAM controls which version of the system memory manager is used by OS 7.5: the legacy 680x0 memory manager or the PPC memory manager (aka the "Modern Memory Manager"). Windows).Īttached is a patch to SheepShaver, to fix a SIGSEGV crash that occurs when booting a new machine with OS 7.5. the oldĭriver in REAL_ADDRESSING mode (with the D(bug()) facility), and the new ![]() This one for all cases but I'd prefer keep it that way. "D:\\SheepShaver\\SheepShaver.Add the complete NDRV variant for DIRECT_ADDRESSING modes. Reply to this email directly, view it on GitHub You are receiving this because you are subscribed to this thread. I dropped it to 8 MB without any difference. 2016, om 05:30, schreef Chris Charabaruk : Here is a more precise explanation in a post in SheepShaver SheepShaver is rigidly mapping memory as if it is not running in anotherĮnvironment. Use memory that SheepShaver wants to use. Possibly you have some other software on the host that happens to Sometimes the problem seemingly goes away by If the problem arises, it is usually solved by aįresh restart of the host computer and/or changing the amount of ram that The issue is known, but many users still run SheepShaver in Windows 10 Working dynamically? It seems like it would fix many of the compatibility Is the rigid memory mapping truly necessary? What's preventing it from Reply to this email directly, view it on GitHub #100 (comment), or mute the thread. You are receiving this because you were mentioned. 2016, om 16:26, schreef Chris Charabaruk happens after restarting the computer and reducing the RAM allocation for the : I find it hard to believe that SheepShaver would be trying to allocate memory for the guest in kernel space or that the memory manager would be unable to allocate the space requested for the guest RAM. Maybe you have a lot of additional software starting automatically at startup? Try different values for ram (like 128MB or 256MB or 512MB), each time after a fresh restart of the host computer. If you search SheepShaver forum for "Cannot map second Kernel Data", you will find threads going back to 2009. SheepShaver does nasty things when trying to allocate memory.
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