Hello,

inspired by zukow thread about powermac G5 here is some info about MorphOS 3.12 on unsupported iMac G5/2.1 (PowerMac12.1):

+ installation works out of the box from instalation CD
+ builtin graphics (Radeon X600 XT) supported
+ sound is supported
+ ide is supported
+ sata is supported
+ usb is supported
+ temperature sensors are supported
+ onboard lan is supported
+ onboard wifi is supported
+ firewire is supported (at least for HDD connection)

- no bootlogo
- fans runs all the time at 100%
- graphics sometimes crashes (GraphicsSpeed, SDLBench, SDL game 1941), but except these three other tested works - for example Quake 3, Tower57, DOSBox(=SDL), OWB with youtube videos.
- camera not supported

Majority of OS works with no problem. Fluently and quickly.
See SystemMonitor and GraphicBoards.
Now I have my iMacG5 MorphOS registered and after addition of NIC I will register also PowermacG5 Quad.

I made some tests and compares speed of machines:
Pegasos is overclocked to 1.33GHz. AmigaOne X1000 runs AmigaOS 4.1FE, all others MorphOS 3.12
Dhystone+Whetstone and games
Exact numbers are in tables in this article (CZ).

Today iMacG5 is suitable for web surfing and gaming and other joy - with small gfx limitations. For me the biggest problem is loud fans.

Generally I am very satisfied with support of "unsupported" computers from MorphOS Devs. Many thanks again.
MorphOS support for unsupported is better then some other OS support for supported.

I have one question - how to debug via firewire?
iMAC firevire port works OK with external HDD. After graphics crashes I want to debug iMAC, but with no success.
I have SDK installed (3.14)
firewire connected with Pegasos2 (SDK 3.12?)
if I set iMAC/logtool prefs: ohci1394_mon SM, on Peg2 nothing visible
if I try run ohci1394_mon SM from shell there is allways error.
Pls, what is correct settings? Is it SN on one side and DPO on other - like here?
There is also info:"Added Firewire debugging to bootargs on the Macs", but I don't find exact bootarg in docs.

> games

The ≈60 FPS figures for Quake 3 on Pegasos, iMac G5 and AmigaOne X1000 suspiciously look like they might be the result of enabled vertical sync with the 60 Hz monitor refresh rate. It may be coincidence, though.

Quote:

Pegasos & iMAC vertical sync was disabled - acc. to this post.
AmigaOne X1000: I don't know exactly, for testing I use ioquake3. I used the same settings like for MorphOS, but "setenv TGLSYNC 0" maybe have no effect on AmigaOS.
Also relatively poor results of powerbookG4 and iMacG5 can be caused by running the test in resolution (1600x1200) bigger then native resolution of their displays.

> "setenv TGLSYNC 0" maybe have no effect on AmigaOS.

Yes, that's for sure. OS4 does not use TinyGL, after all.

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I have the same iMac running 3.12/3.13 betas for several months now and can't confirm any of these.

Well, to be honest not 100% sure bout the bootlogo (would only be displayed for a splitsecond with my SSD) and I haven't really pushed it in the GFX department.

Unit is pretty silent with reasonable temps even when pushing the CPU (and no, no secret-handshake fan control active).

Might need to open up your Imac and make sure it ain't clogged up or maybe clean and reapply the thermal paste. :)

On Quake 3 under MorphOS, be sure to /r_primitives 2 and then /timedemo 1 .

I run the same iMac and I also don't experience those issues. Mine is silent.

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I don't know about Peg2, but I recently did some debug via FireWire between two different Mac setups. First between two PowerMac G5 machines and then between Mac mini and Powerbook. It worked in similar way in both cases.

As the FireWire support has been enabled in the boot.img since 3.12, I had to disable it on the machine I run ohci1394_mon, because it doesn't seem to work if Helios is running. To disable it I gave "fwdebug" (or shorter "fd") argument to the boot.img. If FireWire support isn't enabled in boot.img on Pegasos2 but only on Macs, then this step can be skipped. But in any case the FireWire support must be turned on on the "source" machine you want to get the log from, and turned off on the "destination" machine you want to get the log to.

I didn't get ohci1394_mon to work by any other way but in the "interactive mode". So I started it by "ohci1394_mon ia", and then used the "dl" command to view the log in real time, or "dl ram:fwlog.txt" to save the log to a file. Don't use plain "dl" before "dl file" if you want to get the full log, because "dl" clears it to the point it displays it.

I needed to get the debug at boot time, so I also gave "ed=init" argument to the boot.img. Not related to this case, but I'll document it in this post if needed in the future ;)

[ Edited by jPV 29.11.2019 - 20:48 ]

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Bootlogo is minor issue. During boot process on iMac(HDD) I see grey screen and after that ambient screen.
Booting process with Powermac G5 Quad is faster (SSD), and I see the logo.

The fans on my iMac runs silently with MacOS and Linux. On full speed with morphos. In means it is probably no mechanical problem.
tool sensorlist shows CPU temp 48C and other temps are lower.
Maybe Alert limit ? it's set to 0C for CPU and 80C for others.

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Fans are cleaned. Next time when I will opens iMac I will check again everything. But i think it is no mechanical.

yes, all tested configurations have /r_primitives 2 and identical all settings.

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Many thanks! It works.
Pegasos2 don't need fwdebug argument. The thing is INTERACTIVE mode on iMAC, and not SERVERMODE which I tried before.

Nice to see my released dhrystone and whetstone apps were useful
There's no doubt PowerMac G5 quad is fastest Amiga ever seen until now.

I hope it will be fully supported as soon as possible.
Best strategy to increase MorphOs user base is to support all powerpc macs.
Even full QEMU MorphOS compatibility could be a great option, virtualized hardware will live forever and in few years it will be the fastest MorphOS powerpc machine

> Best strategy to increase MorphOs user base is to support all powerpc macs.

I hope they won't do this as pre-G4 Macs wouldn't bring anything worthwhile to the table. Likewise, trying to support PPC Macs with non-exchangeable Nvidia graphics would unnecessarily bind too many resources.

FAN ISSUE SOLVED!!!

- when booting MorphOS via Openfirmware (cmd+alt+o+f) or Startup Manager (alt) fan runs at 100% and after booting to Morphos the fans continue full speed.

- if I set enviromental variable boot-command + path to morphos boot, then it starts directly to MorphOS, and fans remains quiet.

Easy.
Powermac G5 Quad have not this issue - also with boot via OF or StartupManager after booting to MorphOS fan speed goes down.

[ Edited by sailor 29.11.2019 - 22:23 ]

Hi !

Same iMac G5@2,1GHz here and I confirm the "no bootlogo" (grey screen and Ambient screen but no bootlogo).

For the fan problem, I reset PRam and iMac boots automatically on MorphOS, so no fan at 100% but, some friends have same iMac and iMac shutdown after some minutes/hours because temperature of CPU is too high (fans seem to not start...).
I don't have this problem here for the moment, but the BatteCave (my "MorphOS/Amiga room" ^^) is a bit cold (15°C).

Thank you MorphOS Team for this great unsupport support ! ;)

--
/me will register this iMac asap !

[EDIT]
iMac registered ! (key received 5 minutes after my payement ! Incredible !)
[/EDIT]

[ Edited by BatteMan 29.12.2019 - 08:18 ]

I have the same situation with fans. After 20 minutes of working E-UAE temperature rise till 87degC, and iMac freezes. So i think that fans manage on iMac A1145 is incomplete yet.

Same here with fans...

I have another little buyg. I put 2Go memory DDR2 5300 on my iMac anec Morphos reconized 1.5G....

Would anyone test it with a 2GB memory ?

MorphOS will never show more then ~1.8GB regardless of HW.


Also, after adding a 2GB stick you have 2.5GB installed ( 512MB on the mobo).

Or maybe your stick was just 1GB giving you a total of 1.5GB.

yes i know that... i will test another memory.. maybe i will have more chance

For the memory, I tried an "avail h".

I have 1,5 Go available after the boot, but 155 Mo are used and you can see maximum memory is 1,7 Go.

So, all is good, no ?

imac-memory.png

--
/me thinks this is normal.

ok... my memory is DDR2-6400U... so not compatible....
sorry it's my fault

I have exactly the same as BatteMan.

@beworld - you can try 4200U or 5300U - in my iMAC 5300u (Kingston) working without any problem

[ Edited by Kwiatki75 10.01.2020 - 16:15 ]

yes i put 1Go 5300U == it's working

Do you know if it works as well in 17" model?

Only the 20“ iSight atm.