For the interested ones, the guilty function is exec.library/AllocEntry(). Short extract from its autodoc: "The result is unusual! Bit 31 indicates failure."
So, at max, only 31 bits (0 to 30) can be used to represent an address. And 2^31 is 2GB.

I am a little confused about the original post. It says, "MorphOS also runs on PowerMAC G4 systems now". Does that mean that 2.4 runs on the PowerMac already or am I reading this wrong.

Thanks - J

@jclausen

Read the last paragraph of the original post.

@henes,

Then shouldn't MorphOS be able to use the whole 2gb of RAM installed in a G4 PowerMac?

I have a powermac g4 @ 400mhz but the "problem" of this macs is the exclusive expansion cars like the gfx one.

Very nice!

Quote:

The 2 gb include also teh address space for devices, thus it is less than 2 gb (I thought actually it would be around 1.8 gb)

> I thought actually it would be around 1.8 gb

https://morph.zone/modules/newbb_plus/viewtopic.php?topic_id=6634&forum=3#67586

> I have a powermac g4 @ 400mhz but the "problem" of this macs is the
> exclusive expansion cars like the gfx one.

Can't you simply swap the GFX card for a MorphOS supported one?

I have a radeon 9200 agp but if i pluged it on the powermac havent any video signal.

that's probably because pegasos machines has x86 emulation for gfx cards bios, while powermacs doesn't. afaik, it's possible to update the gfx card's firmware to be powerpc compatible, then it should work... but probably won't work back in pegasos...?

bye, MarK.

Will be any support for the Radeon 9800 gfx card?

Hope so...

Here's to hoping that a release for the Powerbook G4 will show up soon. :)

In the initial release it doesn't even have to have powermanagment and laptop specific functions for me to buy it, as long as those bits show up later in an update. Right now I have an old Powerbook running at 1.33ghz with 1.5gb ram hooked up to an external monitor, usb mouse and keyboard running as a stationary. MorphOS would be really fun to play around with on that and as I understand it the troublesome bits are networking and the ADB bus?

> Will be any support for the Radeon 9800 gfx card?

AFAIK 2D is already supported since MorphOS 2.0.

Quote:

If needed, I guess the team could change the amount of RAM that they reserve for OS devices and such at a later date to make it match the 1.8gb free, or usable RAM that OS4.x does, unless they are currently using more that 0.2gb RAM for those devices and other such OS needs. Not that it is likely that any MorphOS program is going to need more than 1.5gb RAM, or if it does, is an additional 0.3gb going to help?

Maybe by that time, many years into the future, MorphOS will have developed a "work-around" to the memory limitation, or they will create some kind of "Extended Memory", or "Expanded Memory" similar to what was done for MS-DOS to go above the 640kb limit. (that is if MorphOS is still alive years from now and also if there are any developers writing programs for it that need more that the available 1.5gb RAM)

> unless they are currently using more that 0.2gb RAM for
> those devices and other such OS needs.

The difference between 2.0 GiB (= 2.15 GB) and 1.8 GB (= 1.68 GiB) is actually 0.35 GB (= 0.32 GiB).

> is an additional 0.3gb going to help?

The difference between 1.8 GB (= 1.68 GiB) and 1.5 GiB (= 1.61 GB) is actually 0.19 GB (= 0.18 GiB).

will this powermac model be supported by morphos?

Apple Power Macintosh G4/800 (Quicksilver 2002)
it has a radeon 7500.

i've got only 20hrs to act so pls let me know the answer asap:)

Quote:

I wasn't going to reply to your post above because I did not want to show my ignorance regarding the difference between GiB and GB, but the more I tried to make sense out of what you wrote, but more confused I seemed to get. Your mixing and comparing of GiB to GB's has thrown me for a loop.

Are you trying to tell me that AmigaOS4.x can access 1.8GB, not 1.8GiB and MorphOS2.4 can access 1.5GiB, not 1.5GB, so the net difference between what AmigaOS4.x can access and what MorphOS2.4 can access is only 0.19GB, or 0.18GiB, which is much less than the 0.3GB, or 0.3GiB that I was assuming in my post?

Will be supported also Quicksilver I with G4@867, using an AGP ATI Radeon 9250 with 256Mb ram and 128 bit with ROM flashed to Mac version ?
this one Quicksilver I G4@867 :
http://www.apple-history.com/body.php?page=gallery&model=g4_quicksilver&sort=date&performa=off&order=ASC

thanks
regards


[ Edited by Divinity on 2009/12/13 20:14 ]

This is positive, even i'm not interesed myself in getting one of these big noisy towers, but they are reliable, i had several in the past.
I only regret that again we have an annoucement about old hardware, older than the macmini. I just hope one day MorphOS will run on a machine of its time.

Still, very nice effort, it expands the possibilities (way down, but better than nothing).

@SoundSquare

in the future PowerMac G5 and IMac G5 :))))) (a joke)

> Are you trying to tell me that AmigaOS4.x can access 1.8GB, not 1.8GiB and MorphOS2.4
> can access 1.5GiB, not 1.5GB, so the net difference between what AmigaOS4.x can access
> and what MorphOS2.4 can access is only 0.19GB, or 0.18GiB, which is much less than the
> 0.3GB, or 0.3GiB that I was assuming in my post?

Exactly :-)
(Except that 0.3 GB equal 0.28 GiB, not 0.3 GiB.)

@sadddam

In theory, it should, but since noone has such a model to test, it can't be confirmed.

Quote:

Fair enough, but don't whine if it ain't a PowerPC based box ;)

fab: thx. the deal is gone, but good to know that.