rlin@cs.ubc.ca (Robert Lin) (09/14/90)
Does any present day 386 UNIX variant support memory beyond the 16M limit, say on an EISA machine? I've heard from ISC that their version, like Xenix, is limited to 16 megs RAM, because the AT bus only has 16 megs addressable RAM for its data lines. -Robert Lin <rlin@cs.ubc.ca>
james@bigtex.cactus.org (James Van Artsdalen) (09/15/90)
In <9569@ubc-cs.UUCP>, rlin@cs.ubc.ca (Robert Lin) wrote: > Does any present day 386 UNIX variant support memory beyond the 16M > limit, say on an EISA machine? Dell unix (ISC derived) running on a Dell 425TE or Dell 433TE supports up to 64meg I believe. These are EISA tower configurations. -- James R. Van Artsdalen james@bigtex.cactus.org "Live Free or Die" Dell Computer Co 9505 Arboretum Blvd Austin TX 78759 512-338-8789
mburg@unix386.Convergent.COM (Mike Burg) (09/16/90)
In article <47137@bigtex.cactus.org> james@bigtex.cactus.org (James Van Artsdalen) writes: >In <9569@ubc-cs.UUCP>, rlin@cs.ubc.ca (Robert Lin) wrote: >> Does any present day 386 UNIX variant support memory beyond the 16M >> limit, say on an EISA machine? >Dell unix (ISC derived) running on a Dell 425TE or Dell 433TE supports >up to 64meg I believe. These are EISA tower configurations. Wasn't there (is there) a version of Release 3.2 (something like 3.2.2) that allowed the system to work on machine that had more than 16MB? I believe that the drivers that use DMA had to be modified to use special routines to move the data below the 16MB limit. Mike Burg Unisys Corp, San Jose
james@bigtex.cactus.org (James Van Artsdalen) (09/17/90)
In <1305@unix386.Convergent.COM>, mburg@unix386.UUCP (Mike Burg,5934,,) wrote: | In article <47137@bigtex.cactus.org> james@bigtex.cactus.org writes: | Dell unix (ISC derived) running on a Dell 425TE or Dell 433TE supports | up to 64meg I believe. These are EISA tower configurations. > Wasn't there (is there) a version of Release 3.2 (something like > 3.2.2) that allowed the system to work on machine that had more than > 16MB? I believe that the drivers that use DMA had to be modified to > use special routines to move the data below the 16MB limit. I am not sure of the original Dell unix release (> 1yr ago). But the current release does work. This is some memory shuffling that has to happen to get data below 16meg. This may have been a fix done at Dell, but the 425TE *is* fully supported. -- James R. Van Artsdalen james@bigtex.cactus.org "Live Free or Die" Dell Computer Co 9505 Arboretum Blvd Austin TX 78759 512-338-8789