Is the memory limit software or hardware based

So it seems the consensus is the iPhone has 128mb of RAM to play with but given all the features we saw yesterday im starting to worry if the phone can handle too many of those things going on with 128mb

e.g having the iPod app going via stereo BT, then browsing a heavy website and then copying a large block of text from said site to mail...viewing attachments and adding pics in a reply msg. Then sending a voice recording via sms and checking stocks and having an IM app running all at once without something crashing/resetting

Just wondering if the RAM limit is hardware or software based like the CPU. IMHO Apple needs to double it or even go to 512mb if possible

 

So its hardware based

I see