Dan Erickson wrote: > Ah ok, thx for clearing that up for me, at least addition of > addresses worked the way I thought. What I am also confused about > is HOW this works. [...] > Now... how does the computer store a "value" in this address space? Dan, I don't understand your HOW question. Would you please write some guesses about what you suspect the answer to your question might be, or just a couple examples of the kind of phrase it would be? It would help to define the kind of answer you are looking for. Thanks, Ed Vance ---------------------------------------------------------------- Ed Vance edv@macrolink.com Macrolink, Inc. 1500 N. Kellogg Dr Anaheim, CA 92807 ---------------------------------------------------------------- -----Original Message----- From: Dan Erickson [mailto:coldoneknight@rogers.com] Sent: Wednesday, April 17, 2002 2:53 AM To: kernelnewbies@nl.linux.org Subject: Re: Base Address's, etc...(reply from Dan to David) On Wed, 17 Apr 2002, David Stroupe wrote: > That is correct Dan. Most times I do something like this: > > #define CTRLREG 3 > #define ANOTHERREG 5 > > and then do > > writeb(value, io + CTRLREG); > writeb(anothervalue, io + ANOTHERREG); > > HTH Ah ok, thx for clearing that up for me, at least addition of addresses worked the way I thought. What I am also confussed about is HOW this works. For instance, 0x240 expands to 0000 0010 0100 0000 in binary (note... I have put the spaces in for readability purposes). Now... how does the computer store a "value" in this address space? Also.. as I said earlier, 0x240 expands to 0000 0010 0100 0000. So... if you say something like writeb(value, io + 3), then you are writing a value to 0000 0010 0100 0011 instead of the orginal 0x240, which is what you want to do... but highly confusses me on how it works. Thanks alot -Dan Erickson- -ColdOneKnight@rogers.com -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
