4/18/2021 0 Comments Mac Os Roms
On cold boot, Mac OS 9 gave me a temp of 22C, I then set the Mac OS 8.6 as the Startup Disk, rebooted, entered the OF commands and booted to the 8.6 Desktop. Checking Gauge PRO showed a massive jump to 38C within only a few minutes.For a better experience, please enable JavaScript in your browser before proceeding.The Mac OS ROM included with this image of 8.6 is different to later Mac OS ROMs in that it has a much more specific machine check that is run when loading from OF then later Mac OS ROMs (and in OS Xs BootX for that matter) see when the Mac OS ROM image or BootX is loaded in OF they run a small script at the start to check the compatible property in the Root of the open firmware device tree.
![]() The PC133 SODIMM worked fine in a PC100 slot). I have been trying to get Mac OS 8.6 to boot as per your notes. I took a slightly different route, but still cant get anywhere; 1. Prepared a clean Universal install of Mac OS 8.5 in SheepShaver. Upgraded the install to 8.6. Used Disk Utility in Tiger to Restore the Sheepshaver disk image onto a real partition on the Pismos HDD. Blessed the System Folder on the new Mac OS 8.6 partition ( sudo bless -folder9 VolumesMac OS 8System Folder ) 5. Selected Mac OS 8.6 from Startup Disk System Preferences in Tiger. Rebooted into Open Firmware (Cmd-Opt-O-F) 7. I have also tried booting into Mac OS 9.2.2, moving the Finder out of the 8.6 System Folder, putting it back in (to re-bless) and then selecting 8.6 from the Startup Disk Control Panel, before restarting and re-applying the OF command. I think your Mac OS ROM file from the Sawtooth could make all the difference here. ![]() This may do the trick. I copied all of the ATI and FireWire extensions from Mac OS 9.2.2 across to the 8.6 System Folder and rebooted again (applying the OF commands on each boot). Roms Full Graphics AccelerationWith these extensions, we have full graphics acceleration and FireWire support. I can see that the power saving processor cycling software is not functioning properly regardless of my settings in Energy Saver. Ill need to keep playing around with it, but I think power management is going to be at the (nano) kernel ROM level and not something as simple as updating a control panel or extension file. I havent changed the thermal paste or pads yet, and the cooling fan doesnt seem to ever come on (maybe its broken). I shouldnt have been surprised as the room was starting to warm up as well, but all of the playing around started causing signs of the old Pismo overheating. First the memory test began to fail on each boot and then there were graphical glitches. I shut it down for 10 minutes, rebooted into Mac OS 9 and found everything was running cool again. While both operating systems have Energy Saver set to Better Conservation, the idle CPU temps as shown in Gauge PRO are; Mac OS 9.2.2 CPU when idle 30C Mac OS 8.6 CPU when idle 46C (Too high for a G3) Im wondering if the PowerBook1,1 compatible property could be preventing the power management from running properly. I wonder if one is better then the other (mine is the type where all of it shiny, but theres another one where the main heatsink hanging off the heat pipe is a matt gray colour) BTW I cant help but notice that your missing L2 cache in system profiler and that only 160MB of RAM is showing do you see L2 cache when booted into Mac OS 9.2.2OS X, if not, do you get a pop up in Classic Mac OS mention Cache failuredoes diagnostics in OS Xs system profiler mention cache failure it might be related to your overheating issues, Also is your Boot ROM fully up to date theres a surprising amount of machines where this is not the case, I highly recommend you update to the latest which would be 4.1.8f5 for the Pismo IIRC in theory you should be able to edit the Mac OS ROM it self and avoid having to do any sort of OF hackery, but I have not been able to get this to work (following the guide for hacking the Mac OS 9.2.2 ROM, even replacing abort with clear it still halts on a checksum error for me) I also should mention for the MDD to work in 8.6, Much like booting Mac OS 9.2.2 on a 7447AB or 7448 you have to fake the CPU PVR (processor version register) to one that was around when that OS was put out so in the case of Mac OS 8.6 I changed the 7455Bs PVR in OF to that of a 7400, this once again is volatile. Very cool to see you got it working too (I did not even know firewire did not work in 8.6, I never tested it in Mac OS 8.6 LOL). I highly recommend you try and get PowerBook2,1 working, as that is the closest matching mac to a Pismo, (PowerBook2,1 and PowerBook3,1 are both Uninorth 1, Keylargo machines, where as PowerBook1,1 is a GossamerHeathrow machine) what sort of issues are you getting when you try PowerBook2,1. I have since successfully re-run the PowerBook2,1 OF commands and it is booting OK. Perhaps it was a first-boot thing). On cold boot, Mac OS 9 gave me a temp of 22C, I then set the Mac OS 8.6 as the Startup Disk, rebooted, entered the OF commands and booted to the 8.6 Desktop. Checking Gauge PRO showed a massive jump to 38C within only a few minutes.
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