Can we emulate 64 bits?

Sam E wrote:
On 09/09/2015 06:46 PM, Steve Silverwood [KB6OJS] wrote:

[snip]

Even if your computer is capable of running a 64-bit OS, having only
1Gb of memory negates any advantages. You're going to need AT LEAST
4Gb of memory to get any benefit. The main advantage of a 64-bit OS
in my experience is its ability to address more than about 3Gb (and
change) of memory.


Interestingly, most processors (starting with the Pentium Pro) have had
the ability to address at least 64GB RAM (36-bit physical address) while
in 32-bit mode. It's just that Windows won't let you use that. The 3GB
limit is artificial. I don't know about OS X, but I have used 32-bit
Linux and it recognized the 16GB in that machine.


I am currently using 8GB with WinXP Pro SP3 x32.

The memory license is for Ring 3.

There isn't a limit on Ring 0. Drivers live in Ring 0.
I have a RAMDisk, which uses a driver, and the driver
accesses PAE memory space.

It means I have 4GB for program usage, and 4GB for
the RAMDisk, out of 8GB total. The 4GB for program
usage, is "address space" rather than RAM, and the
allocations for hardware on system busses, subtracts
from the 4GB of available addressing. I might have
about 3.25GB of addresses to use, to access 4GB of
physical RAM (meaning 0.75GB is wasted and cannot
be accessed).

4.0GB PAE for my RAMDisk
0.75GB (addresses for system busses)
3.25GB system ram

In principle, the 0.75GB is "hoisted" above the
4GB mark, so it could be accessed by the RAMDisk
with some care. But the RAMDisk doesn't bother with that
optimization.

You can also see some of the weirdness of how the BIOS
maps memory at startup, if you use memtest and look at
the size of blocks it tests.

Paul

On 09/10/2015 07:54 PM, Paul wrote:

[snip]

I am currently using 8GB with WinXP Pro SP3 x32.

The memory license is for Ring 3.

There isn't a limit on Ring 0. Drivers live in Ring 0.
I have a RAMDisk, which uses a driver, and the driver
accesses PAE memory space.

So you do have a way to use that additional memory? I have that same OS
on a machine with 8GB physical RAM. Can you tell me more about how to
get a RAMdisk?

[snip]

--
105 days until the winter celebration (Friday December 25, 2015 12:00:00
AM for 1 day).

Mark Lloyd
http://notstupid.us/

"To depend upon God is like holding on to the tail-end of nothing."
[Lemuel K. Washburn, _Is The Bible Worth Reading And Other Essays_,
1911]

Mark Lloyd wrote:
On 09/10/2015 07:54 PM, Paul wrote:

[snip]

I am currently using 8GB with WinXP Pro SP3 x32.

The memory license is for Ring 3.

There isn't a limit on Ring 0. Drivers live in Ring 0.
I have a RAMDisk, which uses a driver, and the driver
accesses PAE memory space.

So you do have a way to use that additional memory? I have that same OS
on a machine with 8GB physical RAM. Can you tell me more about how to
get a RAMdisk?

[snip]


Interesting. I see they've changed the "free" version to only 1GB.
Now, the version there is Dataram_RAMDisk_4_4_0_RC34.msi

http://memory.dataram.com/products-a...ftware/ramdisk

So try going back a revision, to get 4GB max RAMDisk for free.
I tried to get this from archive.org, but the dataram.com site
uses norobots.txt.

Dataram_RAMDisk_4_4_0_RC33.msi

I can spot a copy here.

http://filehippo.com/download_ramdisk/tech/60398/

Now, I have a copy of that on disk already. Got it Apr.12/2015.
Verify the size and checksums if you want.

6,684,672 bytes

MD5 = 12a5f310c7c8ad468608309a9ec09d3d
SHA1 = 7dce6f3244d40b63ef480f330f204c8aed7f4942

I also bought the licensed version for the Test Machine,
as it has more RAM to work with.

Good luck,
Paul

On 09/12/2015 03:13 AM, G. Morgan wrote:
Gary Stevens wrote:

Can we upgrade 32 bits tablet to 64 bits if tablet has atom processor and
came with windows 32 bits. I've heard Windows 64 bits is much faster than 32
bits but tablet has just 1 GB shared memory. I was thinking to put sdcard to
increase memory and emulate W64 when upgrading to Windows 10 but tablet has
no DVD. What should I do?

Unless you have more than 3GiB of installed RAM there is no reason to
"upgrade" to a 64 bit OS. I'm not exactly sure but I think the first
series of Atom procs. were only 32 bit CPUs anyway.

My netbook has one on those (32-bit only Atom processor). It also came
with 1G RAM (upgradable to 2GB) and 12GB SSD (4GB fixed and 8GB upgradable).

I believe some tablets will only boot 32-bit UEFI, not compatibility
boot (so will not boot a 64-bit OS even with a 64-bit CPU).

--
104 days until the winter celebration (Friday December 25, 2015 12:00:00
AM for 1 day).

Mark Lloyd
http://notstupid.us/

"Giving government money and power is like giving car keys and whiskey
to a teenage boy." -- P.J. O'Rourke

On 09/11/2015 05:31 PM, Paul wrote:
Mark Lloyd wrote:
On 09/10/2015 07:54 PM, Paul wrote:

[snip]

I am currently using 8GB with WinXP Pro SP3 x32.

The memory license is for Ring 3.

There isn't a limit on Ring 0. Drivers live in Ring 0.
I have a RAMDisk, which uses a driver, and the driver
accesses PAE memory space.

So you do have a way to use that additional memory? I have that same
OS on a machine with 8GB physical RAM. Can you tell me more about how
to get a RAMdisk?

[snip]


Interesting. I see they've changed the "free" version to only 1GB.
Now, the version there is Dataram_RAMDisk_4_4_0_RC34.msi

http://memory.dataram.com/products-a...ftware/ramdisk

So try going back a revision, to get 4GB max RAMDisk for free.
I tried to get this from archive.org, but the dataram.com site
uses norobots.txt.

Dataram_RAMDisk_4_4_0_RC33.msi

I can spot a copy here.

http://filehippo.com/download_ramdisk/tech/60398/

That version won't install. Says it's for Windows Server 2003 or later.
The same happens with all the versions on that page (33,32,31,19,16).
This happens with v34 too. The Dataram page doesn't mention XP
compatibility. How did you get it to work?

[snip]

Good luck,
Paul


--
104 days until the winter celebration (Friday December 25, 2015 12:00:00
AM for 1 day).

Mark Lloyd
http://notstupid.us/

"Giving government money and power is like giving car keys and whiskey
to a teenage boy." -- P.J. O'Rourke

Mark Lloyd wrote:
On 09/11/2015 05:31 PM, Paul wrote:
Mark Lloyd wrote:
On 09/10/2015 07:54 PM, Paul wrote:

[snip]

I am currently using 8GB with WinXP Pro SP3 x32.

The memory license is for Ring 3.

There isn't a limit on Ring 0. Drivers live in Ring 0.
I have a RAMDisk, which uses a driver, and the driver
accesses PAE memory space.

So you do have a way to use that additional memory? I have that same
OS on a machine with 8GB physical RAM. Can you tell me more about how
to get a RAMdisk?

[snip]


Interesting. I see they've changed the "free" version to only 1GB.
Now, the version there is Dataram_RAMDisk_4_4_0_RC34.msi

http://memory.dataram.com/products-a...ftware/ramdisk

So try going back a revision, to get 4GB max RAMDisk for free.
I tried to get this from archive.org, but the dataram.com site
uses norobots.txt.

Dataram_RAMDisk_4_4_0_RC33.msi

I can spot a copy here.

http://filehippo.com/download_ramdisk/tech/60398/

That version won't install. Says it's for Windows Server 2003 or later.
The same happens with all the versions on that page (33,32,31,19,16).
This happens with v34 too. The Dataram page doesn't mention XP
compatibility. How did you get it to work?

Dataram_RAMDisk_v4_0_5_RC0.msi

5,567,488 bytes
MD5 = 1c9c709c647d979b1277f6d756dce265
SHA1 = 95f123af724206b9c8dd61dd76bf388098fe9b54

Try here.

http://filehippo.com/download_ramdisk/tech/14475/

Paul

On 09/12/2015 06:08 PM, Paul wrote:

[dnip]

Dataram_RAMDisk_v4_0_5_RC0.msi

5,567,488 bytes
MD5 = 1c9c709c647d979b1277f6d756dce265
SHA1 = 95f123af724206b9c8dd61dd76bf388098fe9b54

Try here.

http://filehippo.com/download_ramdisk/tech/14475/

Paul

That one worked. Thanks. Note that using RAM above 4GB requires checking
box on the "advanced" tab.

--
103 days until the winter celebration (Friday December 25, 2015 12:00:00
AM for 1 day).

Mark Lloyd
http://notstupid.us/

"Every one who publishes a blasphemous libel is guilty of an indictable
offence and liable to imprisonment for a term not exceeding two years.
Criminal Code of Canada sec. 296(1) So, arrest me!"