Help me find the name if this short story? (fiction)

[mmikeyy]

It is in the format of a chat log. A man's consciousness was uploaded to a computer to save him. Now in the future, they downloaded his mind into a body, but the man gave permission for scientists to copy his consciousness and talk to it through a computer. The scientist on the computer is excited because he finally found a version of the consciousness that is stable and lasts more than a few seconds before going crazy. Does this short story sound familiar to anyone?

[harry chickpea]

The general theme was done a few times in science fiction. In one, only a day in the man's life and a single room is supported, and he essentially "reboots" and relives based upon that one day, and various scientists come in to interview him. Might have been done by Campbell? There are numbers of others, but that is what first comes to mind.