Xref: utzoo comp.sys.amiga.hardware:6663 comp.sys.amiga.misc:1160 comp.sys.amiga.programmer:1114
Path: utzoo!attcan!uunet!zaphod.mps.ohio-state.edu!rpi!uupsi!sunic!news.funet.fi!funic!santra!kaira.hut.fi!d37630m
From: d37630m@kaira.hut.fi (Mika Ilmaranta)
Newsgroups: comp.sys.amiga.hardware,comp.sys.amiga.misc,comp.sys.amiga.programmer
Subject: Re: SupraRAM problems!!
Keywords: ram trouble
Message-ID: <1991Feb7.101801.4347@santra.uucp>
Date: 7 Feb 91 10:18:01 GMT
References: <4429@syma.sussex.ac.uk>
Sender: d37630m@kaira.hut.fi
Reply-To: d37630m@kaira.hut.fi (Mika Ilmaranta)
Followup-To: comp.sys.amiga.hardware
Organization: Helsinki University of Technology, FINLAND
Lines: 19

I'd say the trouble is that SupraRAM-card doesn't have DMA support and
therefore a2090 controller which is a DMA controller tries to transfer
data to this RAM with drastic consequents.

The solution to this problem is to set the Mask= option in your 
devs:mountlist so that a2090 won't try to use Supra's RAM. You
just found an other way to accomplish this by using NoFastMem, since
no Fast mem is available the buffers are allocated in Chip/Slow mem.
Ofcourse thisway you can't get the best transfer speed with your 
a2090, but is't the only way it works with Supra's 'lame' RAM card.

--
What we need is AMIGA compatible hard- and software
		      ^^^^^^^^^^
What bug? It's an undocumented feature!
				- Mika Ilmaranta -


- ilmis@niksula.hut.fi -