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- Path: sparky!uunet!charon.amdahl.com!amdahl!JUTS!griffin!gab10
- From: gab10@griffincd.amdahl.com (Gary A Browning)
- Newsgroups: comp.unix.bsd
- Subject: Re: [386BSD] more than 16MB?
- Message-ID: <d6.m02B=30=s01@JUTS.ccc.amdahl.com>
- Date: 7 Jan 93 16:06:51 GMT
- References: <C0EHx0.qr@space.physics.uiowa.edu> <1if0p8INNfau@Germany.EU.net>
- Sender: netnews@ccc.amdahl.com
- Organization: Amdahl Corporation
- Lines: 29
-
- In article <1if0p8INNfau@Germany.EU.net>, bs@Germany.EU.net (Bernard
- Steiner) writes:
- > In article <C0EHx0.qr@space.physics.uiowa.edu>,
- > ljg@space.physics.uiowa.edu (Larry Granroth) writes:
- > > Is anyone out there running 386bsd on an ISA-bus machine with more
- > than
- > > 16MB ram?
- >
- > Yes. I've seen a machine with 20MB and heard of one with 64 MB
- > (yes, sixty-four) No, not me...
- >
- > > Does 386bsd support this?
- >
- > Looks like it.
- >
- > > Does it (does it need to?) support
- > > DMA above 16MB?
- >
- > No idea. I'd be interested in the answer, though.
-
- If I understood the thread that went through here a while back, ISA systems
- cannot do DMA above 16MB - hardware problem. 386BSD needed to be modified to
- load disk buffers below 16MB and then copy them up if necessary. I do not
- know if anyone has attempt to add this to the kernel.
-
- --
- Gary Browning | Exhilaration is that feeling you get just after a
- | great idea hits you, and just before you realize
- | what is wrong with it.
-