So presumably it is possible for Mini vMac to do the same. I've received a "report" that there was a third party upgrade for the original Mac that allowed it to support more than 512K of memory. But there is a later software update that is supposed to make a Mac II 32-bit clean (I assume by providing replacements for many of the ROM routines.) Unfortunately this doesn't work in Mini vMac yet, for unknown reasons. Mini vMac also supports disk images in Disk Copy 4.2 format, which has an 84 byte header, and usually contains checksums and tag data. It was not because the display was small, we were all amazed that even accounting for the size. The Macintosh II ROM is not "32-bit clean", and so has problems with more memory. Mini vMac will accept disk images in formats with trailing information and no header, except that it will pass an incorrect disk size to the emulated computer, which affects programs such as Disk First Aid. No, its not always necessary to add more RAM to a Mac. The (incomplete) Macintosh II emulation currently supports up 8MB. On 68k Ataris, the CPU isnt emulated, giving Basilisk a huge performance advantage over Mini. Minis Built for Governments Ampex Has PDP Options Everybody Wins VENTURA, Calif. It would not be enough to patch the ROM, any System Software version that might be used would have to be patched as well. Basilisk II, a 68K Mac emulator running on the Raspberry Pi. The rest of the programs memory terminal order entry TfexAS Instruments. The Macintosh System software, in particular the part that installs bug fixes for traps that otherwise would be implemented ROM, assumes and depends on the exact address of the ROM. Summary: In this article, you will learn what RAM on your Mac is, how to check memory (RAM) usage on your Mac, and how to reduce. The Mac Plus (and Mac SE) can support no more than 4MB of memory, since the RAM starts at address 0 and the ROM is at address 0x00400000 (4MB).Īfter figuring out how to patch the ROM to support a different size screen, I investigated whether it would be possible to patch the ROM so that it could function elsewhere in the address space. Ok, just read some info on the mini vMac site.
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