Let makefile build relatives links between SheepShaver and BasiliksII so
they can be moved anywhere into the file system as long as they stay side
by side without having to rebuid the links.
Attached is a patch to SheepShaver, to fix a problem where the ROM file can only be found on the first boot.
When a user creates a new SheepShaver machine, there is no preference file, so there is not ROM path preference. SheepShaver has logic so that in this case, it will look for a ROM file named "ROM" or "Mac OS ROM" in the current directory.
The user starts SheepShaver in order to get to the built-in Preferences Editor, and changes various settings (such as creation of a hard disk). Then the user reboots.
If the user forgot to set the ROM path at this time, then SheepShaver can no longer boot. The only recourse is for the user to find and delete the preferences file, or use an external preferences editor to set the ROM path.
The fix is to change SheepShaver to use the default ROM names when either the rom path is null (no preference) OR an empty string (preference exists with no rom path).
Attached is a patch to SheepShaver, to fix a SIGSEGV crash that occurs when booting a new machine with OS 7.5.
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"). 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.
Later Mac OS versions don't have this problem. They don't support the 680x0 version, so they force the PPC version to be used.
The fix is to have SheepShaver initialize the NVRAM to use the PPC memory manager. Note: This is supposed to be the default in OS 7.5.
This affects when a new NVRAM file is used, or when it is initialized after doing zapping the PRAM.
