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  1. CircuitBored

    Debian 12 "Sid" on PowerMac G5 Quad hangs at "smp_core99_bringup_done" after install

    Well, as is often the way, I figured out the issue myself shortly after complaining about it online. It turns out that my ATI X1900XT graphics card was to blame and is a model known to be iffy on PPC64 Linux. Rats! Unfortunately the puny GeForce 6600 is no good either, although it does get...
  2. CircuitBored

    Debian 12 "Sid" on PowerMac G5 Quad hangs at "smp_core99_bringup_done" after install

    I am currently attempting to set up Debian 12 "Sid" on a PowerMac G5 Quad. The installer (recently fixed to provide proper GRUB setup on PPC64) runs without a hitch. Unfortunately, upon rebooting the system and using GRUB, the system hangs at "smp_core99_bringup_done", just after loading the...
  3. CircuitBored

    I got Debian installed but sadly, after selecting the OS in GRUB, the boot hangs after...

    I got Debian installed but sadly, after selecting the OS in GRUB, the boot hangs after "smp_core99_bringup_done". No references to similar issues online. Bummer. How shocking that a G5 could be unpredictable.
  4. CircuitBored

    @LaPorta Here you go :)

    @LaPorta Here you go :)
  5. CircuitBored

    @LaPorta Depends on which version of the cooling system you get. Supposedly the single-pump...

    @LaPorta Depends on which version of the cooling system you get. Supposedly the single-pump version is easier to service. The dual-pump version is completely sealed with epoxy but servicing it isn't all that bad as long as you know what you're getting into before you start. I wrote a guide...
  6. CircuitBored

    Nothing quite screams "I'm installing Debian on an odd platform" like wget-ing a script...

    Nothing quite screams "I'm installing Debian on an odd platform" like wget-ing a script, changing permissions, and then being told that the script is not there even though you tab-completed its name. Classic.
  7. CircuitBored

    @joshc One thing at a time... I'm slowly but surely making progress on the S900 video, then the...

    @joshc One thing at a time... I'm slowly but surely making progress on the S900 video, then the Linux Light is next up. I do think the Quad deserves a little bit of focus though!
  8. CircuitBored

    Hard pivot back to topic: Debian on the G5 is tricky but I think I'm slowly getting there. One...

    Hard pivot back to topic: Debian on the G5 is tricky but I think I'm slowly getting there. One of the things I love about the Quad is the soundscape of it in action, the harmonic resonances of the fans and pumps going in and out of phase. The slow crescendo of "bowowowubwubwuubwooooo" on a cold...
  9. CircuitBored

    I'm mulling over a Linux install to make this old beast a bit more practical. Any recommendations?

    I'm mulling over a Linux install to make this old beast a bit more practical. Any recommendations?
  10. CircuitBored

    It is now cold enough for the Quad to come out of hibernation! After a coolant top up and a bit...

    It is now cold enough for the Quad to come out of hibernation! After a coolant top up and a bit of fan lubrication she is sitting pretty and ready for space heater duty.
  11. CircuitBored

    The above is basically just what I've gleaned from contemporary magazine articles and such...

    The above is basically just what I've gleaned from contemporary magazine articles and such. There's also a little jumper cable that has to bridge the cards for dual-CPU mode. I'm fairly certain that both CPUs share data lines though.
  12. CircuitBored

    @beachycove The 2nd slot has a custom pinout and the 2nd card has some custom logic on it to...

    @beachycove The 2nd slot has a custom pinout and the 2nd card has some custom logic on it to accommodate for the oddness that comes with having what is basically two CPUs wired in parallel. The 2nd "ASPD" CPUs are also flipped compared to a normal PCI PowerMac CPU so as to not block the first...
  13. CircuitBored

    ADB - Device/Power Limits

    There are also a few serial-MIDI converters that draw power from the serial ports, presumably also utilising rectifiers.
  14. CircuitBored

    Attempting to patch the SuperMac S900/Umax Pulsar's Open Firmware with "The Great Gazelle PCI Hack"

    I think I'm just suffering from a small-scale version of the Mandela Effect. I could have sworn that the 9500 had 0020 and 1126 on it. Time to start going off notes and checking actual logic boards rather than my crusty memories. I just tried the card under OS X and... it works in the second...
  15. CircuitBored

    Attempting to patch the SuperMac S900/Umax Pulsar's Open Firmware with "The Great Gazelle PCI Hack"

    1126 and 0020 seem to universally coexist. The 9500 has two 0020s and two 1126s, the S900 has one of each. It's possible that they are two physical parts of the same logical thing.
  16. CircuitBored

    Attempting to patch the SuperMac S900/Umax Pulsar's Open Firmware with "The Great Gazelle PCI Hack"

    My logic board is labelled 9010042-0002 Rev. C, which I believe is the last revision. I think the bus speed is set dynamically, as installing a different speed CPU changes it. With a 400MHz G3 installed the bus runs at 50MHz. I reinstalled the original CPU for testing purposes as I wasn't...
  17. CircuitBored

    Attempting to patch the SuperMac S900/Umax Pulsar's Open Firmware with "The Great Gazelle PCI Hack"

    Here's a freshly extracted ROM and a dev-tree-dump for completeness' sake. Interestingly, it matches the second revision PM9500 ROM, rather than the first. I wonder if this is the case for all S900s, and what the differences from the first revision are. I am slowly dragging myself through...
  18. CircuitBored

    Attempting to patch the SuperMac S900/Umax Pulsar's Open Firmware with "The Great Gazelle PCI Hack"

    Here's my lspci output for the Adaptec card in slots B1, C1, and removed entirely. An ATI VGA card is present in slot A1 for all of these. I am currently in the process of dumping the ROM.
  19. CircuitBored

    Attempting to patch the SuperMac S900/Umax Pulsar's Open Firmware with "The Great Gazelle PCI Hack"

    @joevt Thank you so much for this reply. I am genuinely humbled. I'm going to read through all of this and will post the bits and pieces you mentioned accordingly. Can I dump the ROM from Open Firmware? It is allegedly the same as the 9500's ROM but it would be interesting to compare them...
  20. CircuitBored

    Attempting to patch the SuperMac S900/Umax Pulsar's Open Firmware with "The Great Gazelle PCI Hack"

    Ah, well I guess that explains that. I knew the same ROM was shared by a few systems but I rather stupidly hadn't made the connection that Open Firmware is inside the ROM, so of course it would have a variety of things in it which may be superfluous on certain systems.
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