potts@itl.itd.umich.edu (Paul Potts) (06/13/91)
>Another point: is there any good reason the system doesn't use >memory above the 8M limit for the disk cache? It could also use >this space for a second-level TrueType font cache. Perhaps this >kind of trickery isn't considered worth the effort because everyone >will have 32-bit clean machines soon (right?). Ugh! You mean have some of the system access this RAM specially, even though it isn't properly available to the whole system? That sounds like a DOS machine to me... maybe we can have third party vendors competing with various special memory drivers, that are incompatible with each other... perhaps Lotus, Intel, and Microsoft could get together and create a standard... Yuck! No, it should all be there as part of the big memory map, whether you've got to have a PMMU, swap it out to disk, or even if the physical RAM addresses are discontinuous and re-mapped by the PMMU. (as appears to actually be the case in some of the newer machines). Unless there is one big logical address space that the system sees as contiguous, it just isn't a Macintosh and I just don't want one... Paul Potts potts@itl.itd.umich.edu