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- From: maziere1@husc8.harvard.edu (David Mazieres)
- Newsgroups: comp.unix.sysv386
- Subject: Re: >16MB on a 486
- Message-ID: <1992Sep14.201817.15594@husc3.harvard.edu>
- Date: 15 Sep 92 00:18:16 GMT
- Article-I.D.: husc3.1992Sep14.201817.15594
- References: <BuILEt.1MG@virtech.uucp> <1992Sep13.105315.15555@husc3.harvard.edu> <2669@aegis.or.jp>
- Organization: Harvard University Science Center
- Lines: 19
- Nntp-Posting-Host: husc8.harvard.edu
-
- In article <2669@aegis.or.jp> davidg@aegis.or.jp (Dave McLane) writes:
- >maziere1@husc8.harvard.edu (David Mazieres) writes:
- >
- >>The man page says of the 0/1 flag:
- >> "0 indicates no special properties and 1 indicates memory for which
- >> DMA is not allowed."
- >
- >If you would, what man page for what system? I don't see this of ISC 3.2.
- >
-
- OK sorry, I sort of cheated. Actually that was the SVR4 man page. However,
- I used to use a DELL SVR3.2 that said the same thing. In fact, as I recall,
- the boot file had 16M-64M:1 by default. I wondered what that meant and read
- the man page to find out, which is how I knew what it meant even before I
- went looking for an appropriate quote from the SVR4 man page.
-
- Here's another interesting point, though. The Consensys V4 default is
- ...1M-15M:0,16M-15M:1. Is there some reason for disabling DMA in the last
- megabyte?
-