Hi,

Is It possible to address 2gb ram in MorphOS 2.4 using a Pegasos2 G4@1000 with 2gb ram ?

thanks

Not as far as I'm aware. As the ABox follows the Amiga design the maximum is something like 1.5-1.8GB

> the maximum is something like 1.5-1.8GB

I think it's exactly 1.5 GiB (= 1.61 GB).

yes, 1,5 will be displayed and usable in MorphOS, linux will display and use 2gb if you enable the highmem option for your kernel.

Amiga OS4.1 will use all the 2GB of Ram, While MorphOS 2.2 would only see 1.5, I havn't tried with 2.3 or 2.4, but I've not heard anything about that changing.

As others have said Linux will use all 2gb.

I can't think of many occasions where having 2gb would make any difference over 1.5GB on MorphOS to be honest.

Amiga OS4.1 will use all the 2GB of Ram, While MorphOS 2.2 would only see 1.5, I havn't tried with 2.3 or 2.4, but I've not heard anything about that changing.

As others have said Linux will use all 2gb.

I can't think of many occasions where having 2gb would make any difference over 1.5GB on MorphOS to be honest.

Quote:

Are you sure Amiga OS4.1 can use all 2gb? My A1-XE only shows ~1.8 with two sticks installed.

The AmigaAPI uses negative return-values as error-codes, restricting the address space to 31Bit or 2GiB. In this space the OS must also map the PCI-address-space, legacy ports and some stuff more.

Under MorphOS 512MiB are set aside for it, dunno what the value for OS4 is (but remember 1.8GB != 1.8GiB).

http://i15.photobucket.com/albums/a366/robinsonworld/Amiga/P1020216.jpg

It shows that, but as to it can use it all not, I couldn't say

Ok.

thanks

Hi,
I have now a second Pegasos2 G4@1000 with 2gb ram (last revision 2B5 and last Smart Firmware 2005 12 16).
Now I have these situations:
1) Linux Debian with 2gb ram and also SWAP OK.
2) MOS 2.4 with 1.5 gb ram, but in reality I can use only 1.0 gb ram, why ?.
3) OS4.1 with 2.0 gb ram, but in reality I can use only 1.5 gb ram and SWAP is disabled by default, why ? (If I use only 1gb ram, the SWAP is enabled by default)

Thanks for the support
Regards

EDIT:

I need to add some variable to boot.img to use full 1.5gb ram ? (I see 1.5 gb ram, but in reality I can use only 1.0 gb).

Same question for OS 4.1 (where I see 2.0gb, but I can use in reality 1.5 gb and SWAP is default disabled).

thanks

Quote:

That's quite unlikely. How did you test that?

Hi Fab,

It's very simple, in boot logo I see 1537Mb, then in Ambient I see 1.45Gb/1.4 Gb OK.
Then I copy in RAM: a file for exemple of 300Mb and then I make a duplicate (copy and paste) in RAM: of the same file.
The result is when I have 0.5Gb ram free I can NOT make anything, Ram is NOT more usable.
My conclusion is I can NOT use more then 1.0Gb (but I see 1.5gb ram).

Any ideas ?

p.s.
thanks Fab for you work with OWB.

thanks
regards

Quote:

Well, it could be related to ram-handler itself. But when you have 0.5GB free RAM, can you still launch apps like say OWB or MAME (or anything that would eat significative amounts of memory)? If you can, then the memory is definitely available.

Quote:

Hi Fab,

In this case, then, I can make nothing (I can NOT run OWB..etc.. and I need to reboot the host).

(I think It can useful this "problem" for MOS team to a better/right management of memory in the future relases of MOS).

To me this almost sounds as if the 2nd memory module has some issues. Peg2 can easily have trouble when you use two memory modules (it can be quite tricky to find combination of memory modules that work).

I am fairly certain that the memory management in MorphOS itself is okay.

If MorphOS sees 1.5GB of memory, it certainly is able to use it all.

Do you get any errors when running MemTest?

Quote:

So Is It a problem of Pegasos2 2B5 with last firmware 2005 12 16 ?.
With OS4.1 I see 2.0 gb but I can use perfectly only 1.5gb ram.
With Linux Debian Lenny I can use perfectly all 2.0 gb ram, so It's strange I have problems only with MOS 2.4.
Is there a tool to verify all in details in MOS 2.4 ?

thanks
regards

I have the very same experience Divinity has (2b2 mobbo, latest fw). OS4.1 sees 1.8gb, swap is disabled (which makes sense as address space is limited to 2GB in total), Linux 2gb and MOS' ram disk can be filled up to 1GB and what's worse, even with Ram Disk empty, I get all kinds of crashes and freezes when launching programs, copying files etc.....It definitely doesn't seem like a HW issue since the other two OSes are working correctly.

[ Edited by vulture on 2009/12/14 9:15 ]

So that is no errors reported from MemTest in MorphOS?

memtest ends with errors, I just can't recall the exact message.

Hi,
@all
I use pegasos2 rev. 2B5 and I have NO problem with MOS, OS4.1 and Linux (the three OS are 100% OK).
In MOS 2.4 I see 1.5gb and I can use only 1.0gb.
In OS4.1 I see 2.0gb and I can use only 1.5gb (and SWAP is disabled)
In Linux Debian Lenny I see 2.0gb and I can use all 2.0gb and SWAP is OK.
Where Can I find "memtest" and how to use it ?

Thanks a lot
regards

> Where Can I find "memtest"

C:

> and how to use it ?

Get the template by specifying '?' as argument.

Quote:

Hi,
ok, thanks
boot:> memtest
Allocated memory at 0x2451C4C0 -> 0x7F8AA5BF, 1530454272 bytes
Writing 0x00000000...

well, I run It, and then I see Ram: from 1537Mb to 8.5Mb in about two seconds .... so ?

Do I need to run it in other way, with any variables ? (VERBOSE/S,QUIET/S,DISABLE/S,EXTENSIVE/S,REVERSE/S,VMEM/S,PUBSCREEN,DELAY/N,LOOPS/N)



[ Edited by Divinity on 2009/12/15 23:21 ]

[ Edited by Divinity on 2009/12/15 23:22 ]

[ Edited by Divinity on 2009/12/15 23:22 ]