Classic Mac Hardware (Troubleshooting, Upgrading, & Modifying) > Mac OS 9 Booting on Previously Unsupported Hardware

Mac Os 9 booting on: G4 Tower MDD FW800 (Detailed Posts)

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supernova777:

--- Quote from: Protools5LEGuy on March 13, 2014, 04:49:33 PM ---I had never read that. If it is true, it should not matter what model of MDD to buy for OS9.
Pci usb2 cards work in OS9 as usb1
Pci Fw800 cards work in Os9 as fw400
I asume you mean you cant use onboard usb2.0 ports and fw800.

--- End quote ---

which g4 has usb 2.0  :o
u can have usb 2.0 in win98se ;)

Jakl:
I have used the fw800 cpu (dual 1.42ghz) chips in the fw400
and it works alright - very quick for macos9 - only that it does run hotter
and the os9 doesn't have good manual software fan controllers -
the rate of the fans seem to be higher and noisier in os9 than in osx.
This is probably why the mdd 1.42ghz processors were on a model
that were macosx only the fan controllers were able to be controlled
better within the system - I don't know the reason.

So if I can use the cpu for fw800 on a motherboard for a fw400 mdd and macos9
works then the ROM for os9 must be on the fw400 motherboard and
not on the motherboard for the mdd fw800 g4's - my guess.

So the only downgrade would be a motherboard of the fw400 version
where the macos9 ROM chip resides. Must not be on the Fw800 model
motherboards.

DieHard:
This is like an old wound that never heals...

The reason so many of us got excited back in 2004 was that someone realized there was a special version on the Mac OS ROM File that resided on the Mac diagnostic CD that did in fact allow the G4 MDD FW800 units to boot to (what appeared to be) Mac OS 9.2.2.

Unfortunately, the excitement turn into frustration, since nobody was able to make a working copy that ran even a minimal set of extensions... the Apple diagnostic package with the modified MAC OS ROM file seemed to be a bare minimum alternative that booted to something that had an OS 9 facelift, but did not posses the full OS 9 Mojo... in other words, to my knowledge nobody ever made a full working copy of bootable Mac OS 9.2.2 that  worked on the FW800.... Many rumors have been around for a long time that this modified version of the ROM file (that was never released to the public) had a version that was fully operational under 9.2.2....

it was also rumored that there was a another ROM file version file that even allowed the first G5s to work under Mac OS 9 (although with such radially different hardware, I personally thought of this rumor as an urban legend).

So... in conclusion... any Mac gurus that have a MDD FW800 diagnostic CD, please extract everything needed and create a Bootable complete version of OS 9 for us... we look forward to posting a working copy by the end of the week... or month... or year :)

MacTron:
There is "another" ROM that allow the "Spring 2003" iMac G4/800 "Flat Panel" X Only, to boot into Mac Os 9.
 I've taken a little time comparing that special ROM (convenient called "Custer") and Mac Os ROM 10.2.1 and I always thought that are almost the same thing. My therory is that the Custer ROM upgrades Mac Os ROM 9.8.1 to 10.2.1, but I may be wrong.
As I haven't any FW800 to test it.  I can share This ROM to any one that want to experiment. ...and who knows...

Protools5LEGuy:

--- Quote from: DieHard on March 14, 2014, 08:58:38 AM ---This is like an old wound that never heals...


--- End quote ---
For a OS9 lover that had bought the wrong MDD, sure it never heals...  ;)
My MDD is an 867 dual FW400. I would not buy an MDD FW800, but just because I love OS9 and don't care about OSX only machines and I study my purchases before I do (make the homework).

I hope we can find a solution soon for all those who bought an FW800 and look OS9 saying "I can't".

--- Quote from: DieHard on March 14, 2014, 08:58:38 AM ---
So... in conclusion... any Mac gurus that have a MDD FW800 diagnostic CD, please extract everything needed and create a Bootable complete version of OS 9 for us... we look forward to posting a working copy by the end of the week... or month... or year :)

--- End quote ---
We are searching for it  :)

--- Quote from: MacTron on March 14, 2014, 11:15:07 AM ---There is "another" ROM that allow the "Spring 2003" iMac G4/800 "Flat Panel" X Only, to boot into Mac Os 9.
 I've taken a little time comparing that special ROM (convenient called "Custer") and Mac Os ROM 10.2.1 and I always thought that are almost the same thing. My therory is that the Custer ROM upgrades Mac Os ROM 9.8.1 to 10.2.1, but I may be wrong.
As I haven't any FW800 to test it.  I can share This ROM to any one that want to experiment. ...and who knows...

--- End quote ---

That's great! An OSX only machine that can go OS9!

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