memory mapping on eeprom
mosquito56
Posts: 387
· I have been cruising the site and found the idea of using the upper 32k of the eeprom for storage.·I would like to store my setting on·the eeprom but have no way to tell where the upper 32k starts. I looked for the chip on the protoboard at the parallax site but it just says 64k eeprom. The chip is so small I can't read what it is. How do I find the starting point of the upper 32k of the chip?
· I have searched the site but get so many returns I don't know what to search for.
The post "help writing spin code to propellor" was very helpful.
Don
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······· "What do you mean, it doesn't have any tubes?"
······· "No such thing as a dumb question" unless it's on the internet
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· I have searched the site but get so many returns I don't know what to search for.
The post "help writing spin code to propellor" was very helpful.
Don
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
·······
······· "What do you mean, it doesn't have any tubes?"
······· "No such thing as a dumb question" unless it's on the internet
········
Comments
Last time I checked 32kB in hex is $0000..$7FFF so the "upper" 32k of a 64k chip must be $8000..$FFFF or am I missing your point? If you are not sure whether it's a 32k or 64k then just read the first few locations at $8000 as they should be blank or different from those at $0000. If they are the same then the EEPROM is a 32k chip which ignores the msb of the address.
*Peter*
What bell are we talking about peter? Since a K is 1024 how would I know that 32k is $7fff. This memory stuff is really frying my brain, I just can't get a handle on it. I have no problem with hex but the memory stuff ouch.
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······· "What do you mean, it doesn't have any tubes?"
······· "No such thing as a dumb question" unless it's on the internet
Post Edited (mosquito56) : 6/11/2009 5:49:56 AM GMT