Hmm, maybe just the video intercept driver is 64-bit? I'm not sure
on that one.
Cory
On 21/06/2011 10:50 PM, Robert wrote:
I wondered about that. When I was running windows 7 64bit,,
window-eyes installed under program files x86 folder. Indicating that
it's a 32 bit app. What's up with that?
----- Original Message ----- From: "Cory Martin"
<[email protected]>
To: <[email protected]>
Sent: Tuesday, June 21, 2011 9:29 PM
Subject: Re: window eyes 7.5 and 64 bit operating system
Hi, what is 64-bit? I'll do my best to explain this. Computers
process information at a certain speed, think of yourself watching
traffic go down a street. The first computers were no more than a
rutted dirt road, the travel was slow and you could only go one way
at a time. Then they introduced 16-bit which doubled the width of
the road increasing the speed. 32-bit systems doubled this road
again so now you have even more space for traffic, and 64-bit is
again increasing this width double-wide. So now for more realistic
information. MS-DOS was 16-bit, Windows 95 pushed this in to 32-bit
with the trend continuing trhough Windows 98, NT, ME, 2000 and XP.
By the late end of XP's development they were trying to implement it
under 64-bit, especially since Apple has had 64-bit support for
ages. There are builds of Windows XP 64-bit, but the last time I
tried running one, although it installed fine and my system seemed to
work with it, at the time the other screen reader I was using would
not install it's video intercept driver. We won't get in to the name
of that one but I'm sure you can all guess which one it was. Maybe
Window Eyes would fair better with XP 64-bit, I might try it and
see. Nevertheless, with Vista and 7, they started releasing two
versions, the 32-bit and 64-bit version. The rule of thumb is, if
your system supports 64-bit in all its components out of the box, you
can use it. The advantages to 64-bit over 32-bit is 32-bit has a
limit to how much RAM the system can recognize, 3GB though I've also
heard 3.5GB will be accepted, but nothing more. I see new
motherboards shipping on Tiger Direct that support up to 24GB of RAM
under 64-bit. But if you put 24 gigs of RAM in to a 32-bit system,
it'll only see the first 3 or 3.5 gigs of it. So that's one
advantage. The other is that your processor can push data along that
highway twice as fast as it could on a 32-bit system, so naturally
the system is faster. Windows includes backward compatibility for
legacy 32-bit applications so they will work on a 64-bit system, but
typically you should push to use 64-bit applications on a 64-bit
system instead of 32-bit ones. You will not see 32-bit systems
shipping new out of hte box anymore very much if at all because
manufacturers don't see the need to build small roads anymore when
they can make them twice as wide. The only exception here is
netbooks and smaller systems which cannot support a 64-bit processor,
though that will likely very soon change. Either way, 32-bit is a
thing of the past. A screen reader needs to be 64-bit because of the
intercept driver and I would guess because of the complexity of such
a program needing full access to the OS.
Correct me if I'm wrong, but as far as I know the same download
or disk for Window Eyes will install either a 32-bit or 64-bit
version of the screen reader, depending on what type of opperating
system it detects. As a result you do not need a separate disk for
64-bit.
HTH,
Cory
On 21/06/2011 7:48 PM, Louis wrote:
Hello folks. I just got a computer that is running the 64 bit version
of Windows 7. I have two questions. First what is the diffrence
between 32 bit and 64 bit? Second question, do I need a separate
Window Eyes instalation CD for 64 bit? Thanks for your help.
Louis
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