Date: Wed, 6 Mar 1996 10:45:08 -0700 (MST) From: Terry Lambert <terry@lambert.org> To: mikebo@tellabs.com Cc: terry@lambert.org, mikebo@freefall.freebsd.org, questions@freebsd.org, hackers@freebsd.org Subject: Re: Triton-II support... when? Message-ID: <199603061745.KAA11313@phaeton.artisoft.com> In-Reply-To: <199603052144.PAA02531@sunc210.tellabs.com> from "mikebo@tellabs.com" at Mar 5, 96 03:44:06 pm
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> > FreeBSD supports the Triton chipset. Since the difference between the > > I and II is the cache bug is fixed in the II, I can't see where fixing > > a bug could make it not run. > > As I understand it, there are much more profound changes than simply > one bug fix. I've been told that Triton-II: > o fixes a write-back cache bug > o nominally speeds all memory accesses ~5% > o adds support for concurrent PCI/ISA bus accesses > o adds support for multi-processing > o adds support for ECC memory > > Seems like a *lot* more functionality than can be accounted for by a > simple bug fix, no? Perhaps Terry means Triton-II implements a superset > of Triton-I functionality (plus the cache bug fix) so there's no reason > existing kernel code would break? That's great... I thought perhaps > there was more purpose to the chipset sensing code in > /usr/src/sys/pci/pcisupport.c . If I add a bell to a bicycle, I don't have to relearn how to ride it. A better analogy would be the FIFO'ed floppy controllers: the driver doesn't use the FIFO, but that doesn't mean the driver doesn't work. Or VGA cards for standard resoloutions. I don't think there will be a problem. The *one* potential area for trouble is if the chip ID is different and is used to gate behaviour, in which case, you will need to dup a line in the PCI bus interface data and rebuild a kernel. Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers.
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