Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!cbmvax!cbmehq!babylon!rbabel
From: rbabel@babylon.rmt.sub.org (Ralph Babel)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: GVP SCSI+RAM Series II
Message-ID: <05633.AA05633@babylon.rmt.sub.org>
Date: 5 Jan 91 22:04:01 GMT
References: <1990Dec30.231131.7723@engin.umich.edu>
Reply-To: cbmvax.commodore.com!cbmehq!babylon!rbabel (Ralph Babel)
Lines: 25

In article <1990Dec30.231131.7723@engin.umich.edu>
duck@engin.umich.edu (Ho Han Chyi Howard) writes:

> Well, I have a base 2000+A2286+VGA+PC SCSI
> controller+Mircon 2MB(<-problem).
>
> [...]
>
> After switching the default of (E)ither CHIP or FAST to
> (C)hip only and resetting the mask to 0x1FFFFF in the RDB,
> things became a whole lot more stable.

Restricting DMA to chip memory is usually not required if
the memory expansion supports DMA (and _all_ Zorro-II
expansion cards are supposed to support it. Btw: The mask
value should really be 0x1FFFFE - at least with the V3.7
driver you probably have.

> I suspect that GVP's own fast RAM expansion should work
> with it's own card.

Guess so. In fact, all well-designed RAM expansions should
work just fine with DMA.

Ralph