This article was posted to the Usenet group alt.hackers in
1995; any technical information is probably outdated.
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Re: OBHack...
Article: 7674 of alt.hackers From: crosby@cs.colorado.edu Newsgroups: alt.hackers Subject: Re: OBHack... Date: 16 Apr 1995 21:23:53 GMT Organization: University of Colorado, Boulder Lines: 22 Approved: me Message-ID: 3ms1t9$1rp@csnews.cs.colorado.edu NNTP-Posting-Host: nag.cs.colorado.edu Status: RO
In article <D73L1n.12G@news.uwindsor.ca>, Mark Gryn <gryn@uwindsor.ca> wrote: > Eggasctly. I doubted it. Didn't think that last post would make >it in. So, I didn't bother including an OBHack. Now I find it actually >made it in and so now I must repent my sin(s) and display an OBHack... > > While I'm posting though...I'll ask a question that of course >does not have anything to do with hacking, but I've been wondering about >for awhile. What's the difference between parity and non-parity simms? >(Besides price and a chip on the simm...) Parity simms have an extra bit for each byte for error detection. PC's and other toys usually just use it for basic parity: You add up the bits, and then set the parity to make that add up to either even or odd (your choice). Real computers use ECC and other more complex error detection that can detect more errors then parity and fix many errors. ObHack: A vi-macro plot program to go with my vi calculator. Basically, you just give it a list of numbers and it puts an '*' in the approriate position. Really easy to do actually.
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