Date: Wed, 23 Jul 2003 18:05:20 +0200 (CEST) From: Olaf Hoyer <ohoyer@gaff.hhhr.ision.net> To: ticso@cicely.de Cc: freebsd-alpha@freebsd.org Subject: Re: Adaptec 62022 sf(4) on a Miata 433a Message-ID: <20030723175850.B46209-100000@gaff.hhhr.ision.net> In-Reply-To: <20030723155351.GF513@cicely12.cicely.de>
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On Wed, 23 Jul 2003, Bernd Walter wrote: > On Wed, Jul 23, 2003 at 05:42:49PM +0200, Olaf Hoyer wrote: > > > I already had some talk with Maxime Henrion, a sf-based-card will arrive > > shortly, so there is hope that also busdma will be supported soon. > > Will therefor arise some potential of trouble? > > Yes and no. > A non busdma driver must be aware of alpha to work. > Otherwise a busdma driver is required only for large memory situations, > which we curently don't support yet. > > > The box has currently 512MB of RAM, but will be stocked up to 1GB soon, > > which according to docs is the limit with FreeBSD due to dma limitation. > > My impression was that Miatas are also limited to 1G by hardware? > Does anyone know if Miatas can be fit with >1G? In my Miata there are 6 slots for ECC SDRAM, currently two of them are equipped with 256MB ECC registered Sticks from HP. Perhaps I have the opportunity to check out next week how the machine behaves with 1,5GB, although the hardware compatibility page states that 1,5 GB are possible, but due to OS limits 1Gb limit. Source: http://cvsup.test.ision.net/releases/4.8R/hardware-alpha.html#AEN270 Although the hardware allows you to install up to 1.5Gbyte of memory, FreeBSD is limited to 1Gbyte because the DMA code does not correctly handle memory above 1Gbyte. Same for 5.1 Olaf -- Olaf Hoyer ohoyer@gaff.hhhr.ision.net Fuerchterliche Erlebniss geben zu raten, ob der, welcher sie erlebt, nicht etwas Fuerchterliches ist. (Nietzsche, Jenseits von Gut und Boese)
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