Messages in this thread | | | Date | Thu, 27 Aug 1998 10:40:14 -0500 (CDT) | From | "Andre M. Hedrick" <> | Subject | Re: Tyans and BIOS upgrades (Award v1.02) |
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On Tue, 25 Aug 1998, Dmitriy Budko wrote:
> >From: Mark Szlaga <mszlaga@engin.umd.umich.edu> > > > > The UDMA support amazed the heck out of me, seeing as though the Tomcat > >IV is a HX based chipset... I thought only the TX and newer supported that > >feature. So far It seems to work like a charm, and it is _*FAST*_, though > >I can only get it to function properly under Windows. When I try to run it > >under linux I get:
I tested this on a S1563D (Tomcat III).
> > Anyone else try this BIOS upgrade? Does the UDMA in fact work? Or should > >I avaoid it with a 10 foot pole?
Yes, No, and wait until I can get a formal statement from Tyan. The inital reports that I have are the following..........
(problem 1) : HX will never do UDMA, yet it will report its presence.
(problem 2) : BIOS 4.02 breaks IO-APIC IRQ shifting, but allow one to disable UDMA drive functions. (BIOS 1.02)
(problem 3) : BIOS 4.01 does not allow one to disable UDMA drive functions. (BIOS 1.01)
Tyan is now looking for a way to have BIOS 4.01/1.01 able to disable UDMA drive features, to save the IO-APIC IRQ shifting. There second point to look in to is fixing IO-APIC IRQ shifting in BIOS 4.02/1.02.
> > Intel 430HX/PIIX3 does NOT support UDMA. The new BIOS may set faster > timings for supported PIO and DMA modes. > > Dmitriy Budko former Intel developer of BM IDE drivers for Windows 9x/NT > and now BeOS kernel developer
Dmitriy is correct...........
Cheers, Andre
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