I don't know why it's limited to 1.5 GB?

I know Amiga OS4.1 can use up to 2GB, but as they're both 32bit OS, shouldn't MorphOS see up to 4GB, including graphics cards etc.

Any chance I'll be able to use the full 2GB on my Powermac in the future?

(note, I've never run out of memory even with only 1GB, so it's a fairly accademic question.)

Daff,
Quote:

I'd say that depends on the size of your case ..... but with proper stacking and 4GB modules you should atleast get 1TB in there.

/me runs

Guys I can say that we can debate about this theoritical limits all day and night. The fact is it all comes down to OF. When we were doing ODW build testing we had machines (well sven did for 1) runnning 2gb with a modified OF IIRC. I have a 1gb stick in my peg2 now.. I would try another if I had one. I also cant find an experimental OF I had from Freescale days.. :(

Even with 2 1GB sticks MorphOS will show 1.5, other err, OSs will use the full 2GB.

What about 4 1GB sticks in a powermac g4?

> I know Amiga OS4.1 can use up to 2GB

https://morph.zone/modules/newbb_plus/viewtopic.php?topic_id=6634&forum=3&start=18

> as they're both 32bit OS, shouldn't MorphOS see up to 4GB

https://morph.zone/modules/newbb_plus/viewtopic.php?forum=11&topic_id=6684&start=51

> When we were doing ODW build testing we had machines (well sven did for 1)
> runnning 2gb with a modified OF IIRC.

"We shipped many ODW with 1GB in each slot. 2GB works and is still working today in many instances."
http://www.powerdeveloper.org/forums/viewtopic.php?p=10082#10082

Doesn't sound to me like a "modified OF" was required.

> What about 4 1GB sticks in a powermac g4?

https://discussions.apple.com/message/5237886#5237886

I've tried more than 2GB in a MDD dual 1.42, and no matter what I put in it only saw 2GB.

Dunno why. Wel, MorphOS 1.5GB, Mac OSX 2GB. he rest was just ignored.

What BBRV/Neko say in the powerdeveloper.org thread, is that Genesi shipped many Pegasos2 systems with 2x 1GB memory modules, but
1) You may need a 2B5 revision board for it to work (the last revision)
2) You may need paired RAM (identical memory sticks, paired by the manufacturer)
3) You may need memory of a certain type. I guess the only way is to try? Genesi used "Kingston kit ram with blue heatspreaders", model number KHX3200AK2/2G

@stephen_robinson

Quote:

I think this is because of the way the Amiga API was designed, which MorphOS mimics for Amiga backwards compatibility reasons, and altering this would affect backwards compatibility in a negative way.

>> I don't know why it's limited to 1.5 GB?

> I think this is because of the way the Amiga API was designed, which
> MorphOS mimics for Amiga backwards compatibility reasons, and altering
> this would affect backwards compatibility in a negative way.

That's the reason why MorphOS cannot use the full 32-bit range (4 GiB) but not the reason why it only sees 1.5 GiB instead of 2 GiB.

Actually it's both:
The Amiga-API sometimes uses signed longs as return codes for structures, meaning 2Billion possible addresses and 2Billion possible error-codes

In the 2GB addressspace you now have to cram everything, RAM, GFX-RAM, PCI-cards and onboard-components. Thats where we loose that last 0.5GB.

andreas


Just so you know there were many OF releases that never saw the light of day after 1.2 OF. (probably more than 3 ) Lets say Of "1.3" had boot tones, color splash screen and more. Bplan did some FORTH programming and updated OF for custom Freescale gfx for Motorola and the first rollout of "odw" . You never heard of that right? Exactly.

Do yourself a favor stick to what YOU know not what you THINK you know.


Thank you

[ Edited by magnetic 17.06.2011 - 02:32 ]

1) You may need a 2B5 revision board for it to work (the last revision)
2) You may need paired RAM (identical memory sticks, paired by the manufacturer)
3) You may need memory of a certain type. I guess the only way is to try? Genesi used "Kingston kit ram with blue heatspreaders", model number KHX3200AK2/2G
,

Ok this is iirc

1) Operative word is "may" with newer OF I think older boards would work

2) Generally yes you want matched pair for timings.

3) This is true but Kingston wasnt the only Ram Genesi used. There were several iterations of "odw" the first version that went to motorolla and other clients/partners had Samsung PC2700 (for timing for whatever reason worked really well no errors)

> there were many OF releases that never saw the light of day after 1.2 OF.

No objection to that. I just said that according to what BBRV had stated at least the last official Peg2 OF should be able to properly recognize 2 GiB RAM.

> Bplan [...] updated OF for [...] the first rollout of "odw" .

Why didn't this update come with this "first rollout" then? Didn't they manage to complete it in time for the first ODWs?

> You never heard of that right?

I heard at one point that official 1.3 was Efika only and the official revision for Peg2 following 1.2 should have been 1.4.

http://www.powerdeveloper.org/forums/viewtopic.php?p=5553#5553

> stick to what YOU know not what you THINK you know.

I do know what BBRV wrote in that public statement and I stick to it. That is unless some drunk Genesi employee used their account to make that statement ;-)

> Thank you

You're welcome.

> Kingston wasnt the only Ram Genesi used. There were several iterations of "odw" the
> first version that went to motorolla and other clients/partners had Samsung PC2700

Kingston RAM is what Genesi said they used for their 2 GiB RAM ODWs, which is what we're talking about. At least between October 2004 and August 2006 Freescale only resold ODWs with 256 MiB of RAM which may have been Samsung or whatever type of RAM. This may as well be true for the 512 MiB RAM ODWs Genesi sold through TSS since July 2005 or by themselves but as said those configurations are not what the Kingston comment was about.

I really don't know, but maybe there were some small physical changes in the different board revisions (otherwise - why different revisions at all?) that made newer firmware versions ever so slightly incompatible with older board revisions? The firmware works very tightly with the underlying HW and maybe the reason to why there weren't a publicly released general firmware update that would work on *all* boards simply because it wasn't worthwhile to spend the time and resources to do this? Just thinking out loud...

> maybe there were some small physical changes in the different board revisions
> (otherwise - why different revisions at all?) that made newer firmware
> versions ever so slightly incompatible with older board revisions?

Yes, as confirmed by Neko:

https://morph.zone/modules/newbb_plus/viewtopic.php?forum=11&topic_id=4453&start=32

Hello,

My pegasos 2 is 7 years old, from february 2004 precisely. His firmware was first 1.0 from 20031229, I updated it to 1.1 from 20040405 when I received the computer and I obtained by someone the firmware 1.2 from 20041008. I am not sure about the revision, 2b3 or 2b4. Is there a link where are indicated the revisions of all the boards manufactured by bplan/genesi ? I also read somewhere, maybe here, that I could put a single 2 mb memory module.Is it possible or not ? Would/could I have some freezes randomly or not ?

I have read, maybe here again, also that genesi recommended to use crucial memory modules. Is it true or not ? On their web site crucial knows genesi pegasos 1 and 2 computers and they can propose memory modules for both.

Brumiga

[ Edited by Brumiga 18.06.2011 - 09:47 ]

> Is there a link where are indicated the revisions of all the boards
> manufactured by bplan/genesi ?

There are five revisions of the Pegasos II board, 2B1 through 2B5. You can find it printed on the board itself.

> I also read somewhere, maybe here, that I could put a single 2 mb memory module.
> Is it possible or not ? Would/could I have some freezes randomly or not ?

I'm not aware that a single 2 GiB module (or even 4 GiB module) was ever tried so far. There may or may not be problems with the SmartFirmware in general (or particular revisions thereof) or particular board revisions to properly recognize such module. On pegasosforum.de there's a (German) thread on this topic, so far without report of any findings unfortunately:

http://translate.google.com/translate?sl=de&tl=en&u=http://www.pegasosforum.de/viewtopic.php?t=4546 (Google translation)

> I have read, maybe here again, also that genesi recommended to use
> crucial memory modules. Is it true or not ?

It is true:

https://morph.zone/modules/newbb_plus/viewtopic.php?topic_id=3691&forum=11&start=4
https://morph.zone/modules/newbb_plus/viewtopic.php?topic_id=3739&forum=2&start=24
http://www.powerdeveloper.org/forums/viewtopic.php?p=1074#1074
http://www.powerdeveloper.org/forums/viewtopic.php?p=12164#12164

However, as you can see in this thread, for a configuration of two 1 GiB modules Genesi also recommends a certain type of Kingston RAM.

> On their web site crucial knows genesi pegasos 1 and 2 computers and
> they can propose memory modules for both.

As far as I can see, the maximum they offer as "Guaranteed-compatible upgrades for your Genesi Pegasos II" is 1 GiB modules, so no 2 GiB modules like you asked about.

andreas

Its funny all your thoughts are based on others posts or second hand information.

are you aware I was the project manager of the first ODWs? Do you know I worked for genesi? If it wasnt for Sven Luther some other Euro linux guys and myself there would NEVER have been an ODW project FYI. (oh and not to forget Ron Van Herk and Andre Siegel ) (and naturally bplan and morphos team) I quit in 05 and dont know what they did after that with ODW or anything else for that matter. (As a matter of fact Neko took over the ODW project after SNDF and the best part is the moron did not remove keyfiles and instalalled registered software - and then shipped ODWs out to the developer program - this lead to the whole Burn it debacle (as there was a full beta version on odw that was used to show corporate clients/partners) which somehow I got blamed for)



However, you really should consider your sources and stop arguing with me over everything.

[ Edited by magnetic 19.06.2011 - 00:54 ]

Kronos,
Quote:

I take it there's no plans to fix change this in the future? Or is it just too imbeded in the basic design? Or something?

@Magnetic

Quote:

Hunh? I must have been asleep during that piece of our colourful history.

IIRC VMEM and IO space is in upper 2GB. I think even on AmigaOS CyberGraphX VMEM was always mapped to upper memory space.

[ Edited by itix 19.06.2011 - 12:40 ]