AFNI Message Board

Dear AFNI users-

We are very pleased to announce that the new AFNI Message Board framework is up! Please join us at:

https://discuss.afni.nimh.nih.gov

Existing user accounts have been migrated, so returning users can login by requesting a password reset. New users can create accounts, as well, through a standard account creation process. Please note that these setup emails might initially go to spam folders (esp. for NIH users!), so please check those locations in the beginning.

The current Message Board discussion threads have been migrated to the new framework. The current Message Board will remain visible, but read-only, for a little while.

Sincerely, AFNI HQ

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bob cox
December 22, 2003 09:20AM
I have a Mac G5 system, which has a 64 bit CPU but only a 32 bit OS. I am planning on making AFNI work with 64 bit systems. With some limitations. The principal limitation will be that the size of any one 3D volume will be limited to what can be addressed with a 32 bit int subscript. The way AFNI works internally is that a 4D (3D+time or bucket) dataset is stored as an array of 3D arrays; the time index is the index into the outer array and the 3D space index is the index into the inner array. Thus, as long as pointer types can store 64 bit pointers, AFNI should be able to deal with huge datasets -- as long as each 3D array is "small".

bob cox
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64 bit computing with AFNI

Jerome Sanes December 20, 2003 09:02AM

Re: 64 bit computing with AFNI

bob cox December 22, 2003 09:20AM