First working Win64 program!

[torhu]

On 13.08.2012 02:59, Sean Cavanaugh wrote:
> On 8/12/2012 6:43 PM, torhu wrote:
>> On 12.08.2012 23:21, Sean Cavanaugh wrote:
>>>
>>> Post windows 8 launch we should start seeing mainstream games shipping
>>> 32 and 64 bit binaries together in the same box. We already have moved
>>> off of 32 bit in house for our editors and tools. The biggest hangup is
>>> Microsoft keeps shipping 32 bit OSes, and we still have to support XP at
>>> least through the end of the year. With a little luck Win8 will be the
>>> last 32 bit one.
>>>
>>
>> Can I ask, what are the reasons you want to move to 64 bits on the
>> Windows platform? Is it higher memory requirements or something else?
>> The game with the highest memory use I've got installed is AFAIK
>> Starcraft II, still at only about one GB. And as you know, 64 bit apps
>> can have lower performance than 32 bits in some cases. So I'm curious to
>> know what the reasons are in your case.
>
>     32 bit Windows games are capped at around 1.3 GB due to WinXP
> support.  You can get closer to 1.7 GB of address space out of your 32
> bit apps when run under 64 bit windows, but thats about it, without
> playing with /3GB LARGEADDRESSAWARE flags etc.  Games that push 1.3 GB
> or more run the risk of crashing due to both address space fragmentation
> and running out of memory from the heap.

Ok, so using LARGEADDRESSAWARE doesn't improve the situation on XP 64? 
What about on Vista 64?