Author Topic: Mac OS 9 can't booting, grey screen only  (Read 8255 times)

Offline V.Yakob

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Re: Mac OS 9 can't booting, grey screen only
« Reply #75 on: June 28, 2022, 01:23:55 PM »
Is there no such thing as a Mac user group in Russia?
Well...
Apple is very popular in Russia, mostly because of the iPhone, Watch, AirPods, iPad, but in my opinion, there are fewer Mac users.
And I'll say more, I myself sometimes write manuals for Mac on the blog, because there is little information about Mac in Russian, unless it comes to a "checkbox in the settings" or reviews. For example, I configured a pf firewall on Mac, organized a network TimeMachine on Linux with domain user authentication, transparent domain user authentication to Wi-Fi through the Radius server in Logon Window without using Server.app.
As for old Macs, many people know nothing about them, or have seen them only in the movies. For example, in the movie Hackers (1995), the heroes of the film use Mac, and OS, probably System 7.5.
We have more computers on Windows, 20 years ago everyone I knew had Windows, and no one had a Mac.  ::) I know that it was used in designers, printing houses, etc. But not everything is so bad, there is an Apple computer museum in Moscow, there are a lot of things there. You can find photo reports on the Internet, see if you are interested.
And as you can understand, I have never used Mac OS 9 before on a real computer, only on an emulator, which is not effective. I'm interested! I bought this MDD for old games and Mac OS 9.  ;)
I'm new user Mac OS 9. 8) More precisely, I want to be.

I'm sorry for the offtop, but you asked.

And so, I got a video card, flashed it, and it works fine on Mac OS X Tiger. Mac OS 9 continues to show a gray screen. It turns out, the problem is not in the video card. ;D

peeperpc, When I received this computer, there was a native disk (80 GB) with one partition installed OS X Tiger + Classic
Mac OS 9, which was supposed to boot from Classic files did not boot, there was only a gray screen.
The SSD and PATA to SATA adapter appeared later.
Then I bought a basket with 2 250 GB drives that I connected to port ATA/66, I tried to restore to one of these MacOS9Lives.img images from Mac_OS_9_Universal_install.iso using the Tiger disk utility.
If I choose to boot from a disk connected to ATA/66, it looks like this in NVRAM: mac-io/ata-4@1f000/@1f000/@0:10,\\:tbxi
I tried to install 3 different PATA HDDs, 1 SATA HDD through the adapter and 1 SATA SSD through the adapter, used ATA/100 and 2 ATA/66, as well as 4 different PATA cables.
I also tried 2 DVD-ROM drives, 2 ATA/66 ports and 2 PATA cables.
Only sometimes, it is not clear why, Mac OS 9 boots or I see frozen stripes with a floppy disk, or "Happy Mac" appears and the boot freezes. I've been struggling with it for a ~2 month, and I've probably tried everything.

I replaced disks, cables, monitor, RAM, video card, even specially bought a one-button mouse to work in Mac OS 9 -- Nothing helped. I can't be wrong all the time.


The circle is closed, last two option:
1. Accept fate and accept the fact that I can't boot Mac OS 9;
2. Spend $100 on another MDD.

Unfortunately, due to sanctions, I can't buy a motherboard on eBay. :(
« Last Edit: June 28, 2022, 01:39:36 PM by V.Yakob »

Offline GaryN

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Re: Mac OS 9 can't booting, grey screen only
« Reply #76 on: June 28, 2022, 01:57:43 PM »
Today I installed a new SSD, divided it into several partitions. Installed 10.4.
Copied the "System Folder" and "Applications (Mac OS 9)" directories from the os9general.dmg package to this section, to no avail
I noticed a strange thing, right after copying, rebooting and holding Opt, I did not see the possibility of loading Mac OS 9, it appears only after rebooting with the choice of Mac OS 9.
Oh jeez… I just went ALL the way back to the beginning and found the above.
It now suddenly looks like this may turn out to be yet another SSD bridge adapter that doesn't do cable select problem.
…and it was right here in front of us all the time?

I've been (mildly) admonished in the past for telling users to spend a few (literally, only a few) extra bucks on the RED StarTech bridge boards because they simply always work and work properly in QS and MDD Macs. I have no idea of the availability of them in Russia but if this turns out to have been the issue all along, it won't surprise me AT ALL.

If necessary, here is a primer on IDE cables and the difference between cable select and plain master/slave ones. It's possible to convert a CS to a M/S to force the recognition of an M/S-only SATA bridge card.
http://unixwiz.net/techtips/ide-cable-select.html

I remember trying to find modern engine parts (hoses etc.) that would work or could be made to work in my 1967 MGB.

     This is not much different at all, and preferable to the Kremlin spyware theory…
« Last Edit: June 28, 2022, 02:42:22 PM by GaryN »

Online IIO

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Re: Mac OS 9 can't booting, grey screen only
« Reply #77 on: June 28, 2022, 06:03:39 PM »

 OR a non-cable select cable,

i was thinking about that, too, but didnt say anything because ... how likely is it that someone changes that cable against another one? (and wouldnt OSX also refuse to boot then?)

also, he could fix his problem by simply switching HDDs in that case.
« Last Edit: June 28, 2022, 06:21:36 PM by IIO »
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Offline FBz

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Re: Mac OS 9 can't booting, grey screen only
« Reply #78 on: June 28, 2022, 06:16:44 PM »
“It now suddenly looks like this may turn out to be yet another SSD bridge adapter that doesn't do cable select problem.
…and it was right here in front of us all the time?”


If only it was really that simple. I do really wish.

Vitaly is not using his adapter in conjunction with another drive on the same cable. I often use a single drive and Bribge adapter (jumpered as Master) in MDDs without problem. And I really wasn’t certain that he was using a Bribge, as the link he provided for the adapter - showed two different adapters (one of which was not a Bribge). Then I found another early image he sent and it certainly looks like a Bribge on the last ATA-100 ribbon cable connector - just as I often use. (He’s also tested it set as a Slave.)

      

AND… as Vitaly cannot even get a conventional HD to accept and boot OS 9 (sans any adapter) it doesn’t sound like the adapter and SSD makes any difference anyway. The thing just will not accept, nor boot from OS 9… regardless of his approach. StarTech or Bribge be damned.

Certainly the StarTechs / Addonics are likely best(?) in MDD two-drive scenarios, but performance-wise and in head-to-head comparisons (even in an MDD) the RXD-629A7-7 adapters are nearly as good and for less money. Compare benchmarks here: http://macos9lives.com/smforum/index.php/topic,5436.msg43799.html#msg43799 / Last year the StarTechs / Addonics were $18-$35 each and the RXD’s were right around $10.00. Need to buy more than one and the cost adds up very quickly for a very minor performance boost - IF any at all. (See the benchmarks in link above.)

Then enter the poor lowly Bribge. If it doesn’t cost very much - then it can’t be any good, right? It’s the all around best value, bang-fer-yer-buck in a single drive / ribbon cable use, in an MDD. We had ‘em for cheap last year and still have plenty left. (U.S. orders only.) And lovely in a Quicksilver or G3 B&W.

Bribge vs. StarTech in a G3 B&W….. http://macos9lives.com/smforum/index.php?action=dlattach;topic=6231.0;attach=9825;image

Other benchmark comparisons (Red vs. Green) in Quicksilvers, Digital Audios and MDDs… are also scattered throughout the forum.
Ain’t no admonishment… just simple facts.

I like Bribges… like I once liked Legos and Lincoln Logs.
      
*Blame the above, Bribge “Quicksilver Hillbilly-Array” on IIO. http://macos9lives.com/smforum/index.php/topic,6327.msg47288.html#msg47288
  And the four-stack “pod” does fit under the Quicksilver’s fan. Some assembly required. Not actual size, etc. ::)



Maybe some day the current political B.S. / war will end and sanctions will be lifted. Then mobos, video cards, SSDs and adapters may again traverse the globe. Until then, perhaps this is all now at the point that Vitaly might consider the Mac OS 9.2.2 For Previously Unsupported G4s because the damned thing acts like a FW800 MDD - why not treat it as one? (Joking and not joking.)

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Re: Mac OS 9 can't booting, grey screen only
« Reply #79 on: June 28, 2022, 06:31:55 PM »
hahaha. and good morning.

now that post is true coincidence - where the heck did you got that photo from? ;)

that custom "sidepanel" solution using HDD screws was my temporary end result yesterday after i couldnt find out if a 4-tray metal case for 30-50 dollars will actually fit into a quicksilver CD case.

and i will have to find the fastest adapters you can get for the 2 boot drives. atm all i tried are slower than 70mb/s, which i had with IDE, and it is not acceptable to deteriorate!

(1.board bus= may not be slower than before. 2. sonnet & SSD = for when speed matters. 3.all other connections= speed does not matter for storage.)


Quote
And the four-stack “pod” does fit under the Quicksilver’s fan

mine needs to go on top of CD. i planned mine much lower in the beginning until i noticed that it makes more sense to use small HDDs for those cheap adapters on the ACARD.
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Offline FBz

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V. Yakob Update
« Reply #80 on: July 01, 2022, 05:00:53 AM »
Yesterday darthnvader suggested that Vitaly run debug on one of his installer CDs and the results were that he was finally capable of getting further into the actual OS 9.2 boot process than ever before. (Needless to say that after all this time, Vitaly was ecstatic!) Only, to be confronted with the following…


 

I've suggested that now, instead of booting with extensions off - he might remove / move “all but the essential” OS 9 extensions to the disabled extensions file folder in his OS 9 partition (via OS X) and then attempt an OS 9 boot. But with the time differences between our locations, it often takes a day to hear back from him.

So that’s where this all is, now.

He has provided a nine minute video of the entire debug process that can be made available to anyone wanting to review it.
Message me and I can provide a link. ;)

Offline V.Yakob

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Re: Mac OS 9 can't booting, grey screen only
« Reply #81 on: July 01, 2022, 07:29:45 AM »
Yeah!! Yesterday I can't believe my eyes when I rebooted MDD several times, and every time I saw an unsuccessful attempt to start Mac OS 9. I've probably never been happy about errors before. ;D

I don't know how, but turning on debug mode helped to boot Mac OS 9 in OpenFirmware:
Code: [Select]
dev /
13fff encode-int " AAPL,debug" property
boot cd:,\\:tbxi
A universal community disk was inserted into the CD-Drive.

Today, again, only a gray screen. I started boot from Debug mode ~7 times, but Mac OS 9 did not boot, only this damn gray screen.

GaryN, you're probably right, need to send this MDD to Romania, to the gypsies, so that they remove all the curses from him.  ;D

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Re: Mac OS 9 can't booting, grey screen only
« Reply #82 on: July 01, 2022, 03:33:18 PM »
if you get a "bus error" from a fresh OS9 install then something is wrong with some hardware.

if it is not the graphics card the next i would check is if the preowner maybe broke the power of the USB ports.
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Offline GaryN

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Re: Mac OS 9 can't booting, grey screen only
« Reply #83 on: July 01, 2022, 03:34:58 PM »
CLUES???

1.  Way back when, you mentioned you were running PC3200 RAM. Some asshat told you "Don't worry, it will just run at PC2700 speed".

2.  From the beginning of Macintosh time, a "bus error" has (mostly) meant the system tried to access memory that wasn't there. THAT usually meant a defective RAM stick or bad RAM slot or something related to RAM.

It would seem like a good idea (to me at least) to track down and try some proper PC2700 RAM. I have no idea if that's easy or impossible for you at this time but if you can, I think it might be a good idea. Yes, on the surface it seems unlikely that this is the problem since OSX boots without issue, BUT:

OS9 may perform a memory test at startup. Perhaps it's hanging there because it's never before seen PC3200 RAM.

This "feature" can be turned on and off but unfortunately, you have to already be in OS9 to access the Memory Control Panel and, well……
If you had another OS9-capable machine you could check the test status in the System you're trying to boot and ensure that it's off but you don't and you probably ought to have PC-2700 in there anyway and, and……

Wait!! I have yet another idea!   Please don't ask why it took this long for anybody to think of this

1. Attempt to boot OS9.
2. Immediately after the initial chime, while holding your phone or other image-capture device in one hand, press and hold Command-V with the other to invoke Verbose Mode.
3. Text will scroll up the screen as the system starts and will stop when the boot hangs. Take a pic of the text and post it. It MAY offer a real clue as to what's going wrong.
4. If the text disappears first and the screen goes gray, get pics of all you can before the text goes away.
5. Post them it/them here and cross your fingers…



Offline V.Yakob

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Re: Mac OS 9 can't booting, grey screen only
« Reply #84 on: July 04, 2022, 05:50:38 AM »
The theory is unlikely, since the frequency from 400 to 333 should be lowered by the motherboard when primary initialization is performed. I checked your theory with the question "What if he's right?"
I have several PC2700 RAM sticks and installed 2x256 mb. Yes, you're right, finding such a memory, 4*512 PC2700 is not easy, and sometimes very expensive.

I started MDD and held ⌘+V. Most likely, in Mac OS 9 it is not a protocol mode, as in OS X, but a network boot... A flashing globe appears.



I opened a new topic on booting debugging.



« Last Edit: July 04, 2022, 07:38:17 AM by V.Yakob »

Offline GaryN

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Re: Mac OS 9 can't booting, grey screen only
« Reply #85 on: July 04, 2022, 03:09:12 PM »
I hoped that the OS9 memory check was activated and hanging because of the 3300 RAM. Especially when the almost-boot showed "bus error".
Oh well…

As for verbose mode, much (all?) of it is a log of the UNIX kernel coming up but I hoped (there's that word again) possibly some little thing from firmware or ? might display first.
Oh well…

This is where (no, actually we were here long ago) I would be trying a different motherboard. Yes, I know they don't exactly grow on trees there. At this point however, if you can actually find another MDD, The purchase can be justified as acquiring some spare parts.

I am otherwise (and I really hate to admit it) totally out of ideas…

Offline vad12

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Re: Mac OS 9 can't booting, grey screen only
« Reply #86 on: July 04, 2022, 04:24:12 PM »
If you can burn cds and have access to macintosh repository, you can try the Apple diagnostics tools they have hosted there. One of them should be optimized for MDDs, I'm just not sure which. Those are supposed to be the "official" hardware diagnostics tools for Apple machines. macintosh garden probably has those CD images too.

I have a Sawtooth with a busted DVD drive, so I haven't had first-hand experience with those tools and can't say much more about them.

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Re: Mac OS 9 can't booting, grey screen only
« Reply #87 on: July 04, 2022, 05:49:18 PM »
The theory is unlikely

if you get a bus error, it can be any bus, including RAM. (until we know better ;) )

RAM, USB, IDE, PCI and AGP cards are in my opinion the most interesting things to look at (a malfunctioning speaker or bluetooth device should not interfere with booting)
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Offline V.Yakob

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Re: Mac OS 9 can't booting, grey screen only
« Reply #88 on: October 18, 2022, 02:35:33 AM »
Hello friends! I haven't written on the topic in a long time, but I'm back. :)

So, I bought another exactly the same PowerMac G4 MDD (2003), Single 1.25 MHz. And I checked all previous attempts to run Mac OS 9 on it - they are successful! It works! That is, I did everything right from the very beginning.

Everything works on this PM without any problems.
After washing, I started comparing these two computers to understand how they differ.
I changed the components one at a time and had no positive result until I changed the processors.
After I swapped the processors, the new computer stopped starting Mac OS 9 (yes, gray screen), and the old computer began to start Mac OS 9 without problems.
I swapped them again and the situation was the opposite, the new computer starts, and the old one is not again.
Obviously, it's a problem with the processor.
Processors are really different. I added several photos to the archive.

Mac OS 9 won't boot -- XC7455B RX1250DF (84L64M, QEU0313C), Samsung 337 K7D403671B-HC30, 820-1497-A, 94V-0 343P
Mac OS 9 boot -- XC7455B RX1250EF (34L64M, QGG0340D), Samsung 440 K7D403671B-HC30, 820-1497-A, 94V-0 423T

How can this be? The XC7455B RX1250DF (84L64M) processor is working properly, it passes all mathematical tests, OS X (10.2-10.5) works properly on it. Bad revision?
« Last Edit: October 18, 2022, 03:04:20 AM by V.Yakob »

Offline FBz

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Re: Mac OS 9 can't booting, grey screen only
« Reply #89 on: October 18, 2022, 08:50:52 AM »
Hey Vitaly! Hello.

(Not forgotten.)

Congratulations on finally getting the thing to boot with a different CPU. One would think that with what appears to be an earlier, alpha-numeric sequential manufacture date of the RX1250DF (J5338 vs. J5344 of the RX1250EF) that there would be no trouble booting OS 9 with the DF CPU unless of course it is just faulty. AND the DF chip also appears brand new (especially considering the white surround of the die itself). No heat trace from extended use?



I considered that it (the DF) might be a CPU from a later MDD FW800 (more than once) but even that should have booted OS 9 - IF it were placed on an earlier FW400 MOBO (as has been done here often).



I am afraid that we still have a mystery, but relieved that it will now boot OS 9 with the RX1250EF.

Should such a time ever occur that mail is once again permitted between our two countries, I shall send you another working MDD CPU. In the meantime, congrats on being able to boot and run OS 9 on your mysterious MDD!

*I’d still check, double-check and re-check ALL of those pins on the back of that daughtercard. That DF just doesn’t look as if it’s ever been used extensively / completely. ;)

Offline V.Yakob

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Re: Mac OS 9 can't booting, grey screen only
« Reply #90 on: October 18, 2022, 10:18:50 AM »
Hey, FBz!!

No heat trace from extended use?

Nope, he looks great. I also tried to  cleaned up the contact group with compressed air to get rid of dust that could interfere with normal contact.

I considered that it (the DF) might be a CPU from a later MDD FW800 (more than once) but even that should have booted OS 9 - IF it were placed on an earlier FW400 MOBO (as has been done here often).
I checked -- FW800 was not released with a single 1.25GHz CPU.

*I’d still check, double-check and re-check ALL of those pins on the back of that daughtercard. That DF just doesn’t look as if it’s ever been used extensively / completely. ;)

I've probably checked everything 5 times already, 100% The problem is repeated on each MDDs.
XC7455B RX1250DF -- Mac OS 9 won't boot (grey screen only)
XC7455B RX1250EF -- Mac OS 9 is boot

With the fact that I ran all the tests I could find, "RX1250DF" worked fine. If you remember, I tried OS X (10.2-10.5) and even Linux Debian built for 32-bit PPC, the processor has never failed.

I have only one consideration left - the revision problem.

I'll try to sell one of these MDDs, I'll buy another daughtercard: DP 867 MHz. At our flea market, I found only one for little money.

Offline FBz

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Re: Mac OS 9 can't booting, grey screen only
« Reply #91 on: October 18, 2022, 10:32:58 AM »

I checked -- FW800 was not released with a single 1.25GHz CPU.

Ahh, you are correct my friend.
My current, COVID-addled brain confused this with the 1.0 GHz SP FW800 MDD. ::)

Perhaps someone else has a better explanation?

**One last thing…
- IF you are completely convinced that it will not work and have tried everything else, you might try lightly brushing all of those contacts with distilled white vinegar to remove any tarnish or oxidation that might not be visible to the naked eye. I wouldn’t leave the vinegar on there for very long and might try it a couple of times between rinses with clear distilled water. Then after ample drying time… try the CPU one last time. ;)

Offline peeperpc

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Re: Mac OS 9 can't booting, grey screen only
« Reply #92 on: October 18, 2022, 10:57:47 AM »


I have only one consideration left - the revision problem.



Agreed, the first one might have the processor replaced and it's not fully compatible with the logic board.

As it is mentioned in the Powermac G4 repair manual that ,for some revisions of logic boards, when the processor is defective, you need to replace both the processor and the board with a whole new set from Apple, not just the processor. The reasons probably were compatibility issues and Apple no longer had the right processors for those revisions of the boards in stock.

PS: Well, if the logic boards in both of them turn out to have the same revision number (820-xxxx), this would go back to a mysterious case.

Offline V.Yakob

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Re: Mac OS 9 can't booting, grey screen only
« Reply #93 on: October 18, 2022, 02:19:24 PM »
you might try lightly brushing all of those contacts with distilled white vinegar to remove any tarnish or oxidation that might not be visible to the naked eye.
I used 90% alcohol (medical) and cotton pad.

Offline FBz

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Re: Mac OS 9 can't booting, grey screen only
« Reply #94 on: October 18, 2022, 05:56:54 PM »
The vinegar has acetic acid and will "cut" tarnish and oxidation, whereas the alcohol is less likely to do so.

Place a copper coin or copper wire in some vinegar overnight and see how shiny & clean they are next morning.

No scrubbing or friction necessary. Worth a shot on a CPU that has been so problematic thus far.

AND the following from ervus over on MacRumors, just now...


Offline refinery

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Re: Mac OS 9 can't booting, grey screen only
« Reply #95 on: October 19, 2022, 07:14:51 PM »
in 20 years since these machines came out i have -never- heard of a processor having a compatibility issue with OS9. We've gotten newer processors to work with OS9 boot, there's no reasonable explanation why some small subset of processors would have an issue... and that would also wreak havoc on Apple support having to maintain two distinct stocks of processors for warranty replacements back then, etc.,  It just makes no sense.
Neither does the RAM issue. 3200 Ram works fine. I have been using 1GB 3200 DDR sticks in my MDD machines for years, never had a problem.
i'd have to guess there is something really obscure that is wrong with that one processor. maybe a ROM version mismatch.
got my mind on my scsi and my scsi on my mind

Offline robespierre

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Re: Mac OS 9 can't booting, grey screen only
« Reply #96 on: October 20, 2022, 07:12:12 AM »
Or... there is some processor feature(s) used by OS9 that are not used by OSX. Block address translation regs? I guess it's possible they could have developed a defect.

Offline V.Yakob

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Re: Mac OS 9 can't booting, grey screen only
« Reply #97 on: October 30, 2022, 07:26:06 AM »
I'll try to sell one of these MDDs, I'll buy another daughtercard: DP 867 MHz. At our flea market, I found only one for little money.

So, I managed to buy a DP 867 MHz daughtercard for only $20 with delivery, and expected Mac OS 9 is working fine.

XPC7455 RX933PC (91L96C, DQR0220), Samsung 226 K7D403671B-HC25, 820-1310-A, 94V-0 242P


To sum up this long topic:

Processors work properly on Mac OS 9 and Mac OS X

1250 MHz x1 -- XC7455B RX1250EF (34L64M, QGG0340D), Samsung 440 K7D403671B-HC30, 820-1497-A, 94V-0 423T
867 MHz x2  -- XPC7455 RX933PC (91L96C, DQR0220), Samsung 226 K7D403671B-HC25, 820-1310-A, 94V-0 242P


The processor works properly in Mac OS X, but Mac OS 9 cannot work properly. Sometimes Mac OS 9 boots (sometimes freezes, sometimes works fine), but in most cases only a gray screen.

1250 MHz x1 -- XC7455B RX1250DF (84L64M, QEU0313C), Samsung 337 K7D403671B-HC30, 820-1497-A, 94V-0 343P

The reasons for this behavior remain unclear, and it is most likely impossible to find out.

Thanks all for help in solving this strange problem!  ;)


P.S.
A problem processor must be put in a frame and hang on the wall.  ;D

Offline GaryN

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Re: Mac OS 9 can't booting, grey screen only
« Reply #98 on: October 30, 2022, 01:49:03 PM »
I still suspect the FSB…  :P

Offline FBz

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Re: Mac OS 9 can't booting, grey screen only
« Reply #99 on: October 31, 2022, 08:14:15 AM »
Given that today is Halloween (even if Russians do not celebrate it) perhaps rather than framing and wall-hanging this thing… I’d suggest the use of a propane or acetylene torch to burn it to a complete & total crisp… AND then bury it deep within the earth. (During a full moon?)

OR perhaps... instead:
After burning it sufficiently… then attach the remains to a wooden stick / tree branch, to then be waived (as a talisman) over any other troublesome Mac or particularly troublesome Mac part. This may serve to drive any malevolent (bad ju-ju) spirits from any future problematic machines or machine parts.

A few of us have invested many hours of thought into this thing, so it may now have some other, thus-accumulated symbolic psychic power?

I think the damned thing is cursed. :P

Boo, y’all.

Big congrats to Vitaly!
Long may his DP 867 MHz MDD serve him well.
(Nice price too!)

Offline DieHard

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Re: Mac OS 9 can't booting, grey screen only
« Reply #100 on: October 31, 2022, 10:04:51 AM »
OK... so apparently we are seeing things in 2022 that we have never seen before...

1st:  The famous 1.25 Dual that only ran at 917Mhz.
http://macos9lives.com/smforum/index.php/topic,6443.msg48360.html#msg48360

2nd: Now the 1.25 that hates OS9

Since Mactron and I have literally tested many dozens of MDD daughterboards over the years, and even throwing Xserve CPUs in MDDs without issue, I don't think it is a "rev" of the CPU that is causing the issue of "Not Booting or OS 9", I think more likely, our precious MDD CPU daughter boards are getting old, just like me, and are starting to have "health" issues after 20 years.  We have already proven, that old macs can die a total death or start to produce some strange anomalies and decide to "work, but not as expected"

It makes sense that heat kills; micro-cracks and transistor failure on a microscopic level will continue to plague our CPU daughterboards.  Just because we cannot recognize or pinpoint the CPU feature that "OS 9 needs" as opposed to what "OS X Needs" does not mean it doesn't exist and perhaps that "feature" is going bad.  That fact that OS 9 has booted and then froze supports the argument that we have intermittent electronic failure and NOT a missing feature from this particular CPU revision, otherwise, it would be more consistent and just never attempt it.

At this point, I usually stick to a rule with Old PPC hardware.  If the part displays intermittent issues, and I cannot fix it on a component level, then it gets trashed immediately. In the old days, I made a terrible habit of re-shelving parts and forgetting to label them "maybe bad" and hoping God would fix it, or it would fix itself, only to re-use it months later and get bit in the ass all over again. Now, those parts get a dirt nap, or a label if they are rare, but it is done immediately.  If a labeled part displays the same or a different issue at a later time, there is no third strike, it gets tossed.

In other words, I personally would not use this CPU in OS X, even if it appeared to work correctly.  If I was on a serious budget, then I would run the Mac MDD diagnostics in "extended" mode at least 2 times (even if that took several hours) before I would rely of this computer for anything of importance.  I would not want to be in a position of loosing work/time on something that is not reliable. You did the right thing and bought a different CPU.  I think we all got analysis paralysis on this one so I think in the future, we better go with our gut... swap out memory, then duaghterboard, then logic board, all while testing with the diagnostic CD.

 


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