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- >From: mw@eunet.ch (Markus Wild)
- >Subject: Re: X11R5, MMU Panic, etc.
-
-
- >> I get them all the time on my lowly A2000 (GVP@33Mhz 030). 38.4K SLIP
- >> connection to my 486.
- >
- >Hmm.. does anybody else have this problem, and does *NOT* have a GVP
- >board? I really start to think that the best thing you can do with GVP
- >boards is to use them as door stops...
- >
-
- You are correct. It is soley a GVP problem, as they are unable to
- properly implement DMA with their boards. The "fix" is to patch the DMA
- xfer size down to 512bytes, as previously stated on this list. What
- GVPPatch does under AmigaDOS is monitor calls to OpenDevice() to activate
- the patch only during serial transfer sessions. (I _believe_ they hook
- OpenDevice(), haven't looked at the source...)
-
- So, in theory, a "fix" for NetBSD would be to watch serial port opens
- and patch the DMA size, or simply fix the DMA size at 512bytes all the time.
- (or even just turn it off).
-
-
- -wps
-
-