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croissantking

croissantking

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  • croissantking
    The Apple HDI-30 cable is like a comically large serial cable connector.

    IMG_1730.jpeg
    • Like
    Reactions: Phipli
    Phipli
    Phipli
    Perhaps the others shrunk in the wash?
    croissantking
    croissantking
    I really like some of these older Apple cables - they're thoughtfully designed.
    Phipli
    Phipli
    Other than the HDI-45. Stupid things. The fact that you need a foot of adapters out the back of a 6100 to connect a VGA monitor 😆
    croissantking
    The one Mac in particular that I enjoy running at stock speed is the SE/30. Maintaining one running reliably is sufficient enough of a challenge.
    croissantking
    IMG_9807.jpeg

    New visitor. A parts dual 867.

    The case design is actually quite logical and well engineered but it’s crazy just how much they’ve hacked this case design about to beef up airflow. I think someone must’ve been panicking about the amount of heat the 7455s put out.
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    croissantking
    croissantking
    I got this working - PSU needed a recap.
    Phipli
    Phipli
    Yeah, I suspect the same with mine, I just couldn't afford the caps when I got it and don't want to put in an order for just the caps with the cost of shipping these days. At some point I'll get around to it :)

    I have booted my MDD from a PC PSU so I know it works otherwise.
    croissantking
    croissantking
    @Phipli I hear you regarding the cost of … everything. My symptoms were that the computer’s front light would light up momentarily when pressed and then nothing. A few of the caps were noticeably bulged. I replaced everything apart from the three large bulk caps and it sprang right to life after that.
    • Like
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    croissantking
    IMG_7435.jpeg

    7.5.3 Clean universal install, this message pops up - weird.
    croissantking
    Available modes on a trayloader iMac when connected to an Apple Multiscan 15AV:

    IMG_7285.JPG
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    • Confused
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    Powerbase
    Powerbase
    I remember my old Multiple Scan 15 would happily switch to a resolution it darn tooting couldn't run, thus damaging itself.
    Snial
    Snial
    512x384 is the biz! Give that iMac the Color Classic feels!
    Durosity
    Durosity
    1600x1200 on a 15" screen woulda been crazy if it'd worked.. it'd be like a Retina display!
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    croissantking
    My SE/30 sometimes makes this Sad Mac tone (in this case due to a poorly seated SIMM) – it's not often heard and the first half sounds a bit like a Game Boy. I wonder what it means and what fault causes it to play that specific tone.

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    Reactions: pax, RetroTechTom, dougg3 and 2 others
    Bolle
    Bolle
    I've heard that before but couldn't find a failsafe way to reproduce it. But it does indeed seem to be RAM related...
    D
    dougg3
    I have a quick video that shows off the four different death chime variations on my IIci:


    Sounds like yours is Error4Handler. Unfortunately the leaked SuperMario source code doesn't explain the difference between Error3Handler and Error4Handler, so we'd probably have to disassemble the ROM to figure it out. I agree though, it's almost certainly a RAM test failure.
    croissantking
    IMG_6519.jpeg
    48MB RAM in a 520c
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    • Love
    Reactions: pax, demik, KGLlewellyn and 3 others
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    croissantking
    croissantking
    Haha @Snial, you’ve certainly paid attention to the details! Yes, RAM Doubler is enabled. I use this 520c chassis to test everything. The CPU currently in the machine for 48MB testing is 33MHz. I probably tested the 40MHz CPU in here a while back and moved it to a 540c chassis where it now lives. The 33 in the Control Strip *is* the CPU speed, but it only ever shows 25 or 33 and nothing else.
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    Callan
    Callan
    NICE! I guess that second RAS line was found.
    Great job! I'm gonna have to add that to the list of mods I'm doing to mine! Cheers!
    croissantking
    croissantking
    @Callan Yep i found the unused RAS line! Between [0] and [2], incredibly haha.
    croissantking
    IMG_6321.jpeg
    • Wow
    Reactions: zefrenchtoon
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    croissantking
    croissantking
    @robin-fo yes it’s something interesting in the iMac trayloader’s firmware. I got to it purely by accident - I was dumped into OF due to an error and this appeared when I typed Mac-Boot. It almost looks like the beginnings of the boot picker GUI, which of course wasn’t yet implemented on the very first New World Macs.

    @joevt have you seen this before?
    J
    joevt
    Yes, on my B&W G3 and DingusPPC (B&W G3, iMac). That image appears after a boot file has been chosen automatically. It's just showing what is booting (device path, partition number, file path, file type, icon). The icon image is in the CHRP boot script in the data fork of the "Mac OS ROM" file. Search for "multi-boot" and "multi-boot-menu" in this forum for info about the boot picker.
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    Snial
    Snial
    Interesting, I'm going to be at the Everything Electric show in Farnborough in early October, where I hope to pick up a friend's B&W G3. I'll have space, because it can go under a desk. It'll be a cross-over Mac as it can run Mac OS 8.6 through Mac OS X 10.4.
    croissantking
    IMG_5420.jpeg

    Found this photo from 2003. If I had only known about flux 😢
    • Sad
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    Snial
    Snial
    Then that's very encouraging. My experience with soldering at school in the mid-1980s had led me to believe I couldn't solder at all until I forced myself to learn the basics over 2004-2005. Actually it was more like I'd lost confidence again between the mid 1990s and the mid 2000s.
    obsolete
    obsolete
    When I was young and ignorant, I used plumbing flux, because it was all that was available locally. Oh, the corrosion...

    @Snial I didn't think I was any good at soldering either, until I got access to good equipment and materials. Once I was using the good stuff, things I struggled with before became so easy, it felt like cheating. Still does sometimes.
    • Like
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    Pilgrim33
    Pilgrim33
    Great photo quality for 2003!
    croissantking
    I asked ChatGPT to show me how Mac OS X might have looked if it were designed to run in 24-bit addressing mode.

    IMG_4965.jpeg
    croissantking
    IMG_4689.jpeg

    Successfully moved a 466Mhz 7400 CPU onto a G3 CPU card - harvested from a Digital Audio card that I obtained for peanuts. The cache chips are rated at 250MHz, so I guess this thing will easily do 500MHz.

    The old 750L will go onto an iMac trayloader CPU card.
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    croissantking
    croissantking
    croissantking
    croissantking
    -Preheat donor PCB, use hot air to remove chip
    -Remove solder balls. Clean pads with braid/IPA
    -Line up stencil, tape to chip. Mask unused holes
    -Smear flux into holes
    -fill holes w/ solder balls
    -Heat chip w/ hot air @300C until balls melt to pads
    -Remove stencil + clean chip
    -Coat new PCB pads w/ flux
    -Line up chip
    -Preheat PCB + use hot air @300C to heat chip, should drop once soldered into place
    croissantking
    croissantking
    This thing’s rock stable at 567MHz!
    croissantking
    Does anyone else think OPTi 'Firelink' is misleading and just a bit off? I mean, it implies it could be a Firewire chip.
    croissantking
    Got some OPTi chips for future Personality card mods. The plastic wrap on these Chinese imports always smells of citrus.

    IMG_4559.JPG
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    croissantking
    croissantking
    @zigzagjoe I thought remarking usually is to disguise a lower speed grade as a faster one, or one with fewer features as having more - not relevant for this USB controller?
    If the chips work, and identify as 82c861, then would it matter if they were remarked?
    zigzagjoe
    zigzagjoe
    I'm given to understand it is more often cosmetics. Customers want new looking part not scratched up salvaged parts rather than malicious intent.

    For these I concur if it functions correctly then it's not really a huge concern, just good to know.
    croissantking
    croissantking
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