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| Messages - trag | |
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1
Operating System / Install 7.6.(1) on Kansas PowerMac
July 12, 2012, 22:44 |
Ah, nuts. I had 7.6.1 on this machine before, but I lost a couple of hard drives in a striped array last year and that took out my 7.6.1 volume too. I can only assume I created it before this machine had a Kansas logic board. It ran fine though, before the great hard drive failure of 2011. It's actually a cheap PC tower case in which I've used various logic boards. So I guess I'll have to dig out an older machine on which to run the installer. Hmmmm. Or I could just let Retrospect do it's thing. I'm sure I backed the 7.6.1 volume up to tape at some point. I hadn't thought of that before in the last eleven months. Sometimes it helps to just ramble about these things. I got so caught up in doing fresh OS installs. The irritating thing is that this isn't really a Kansas Logic Board either. It's a Umax S900 logic board with the ROMs removed and Kansas ROMs soldered in their place. So, if I'd never changed the ROMs, which yielded very tiny benefits, I wouldn't have this problem. |
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2
Operating System / Install 7.6.(1) on Kansas PowerMac
July 12, 2012, 19:55 |
The earliest system the Kansas PowerMacs support is 7.6.1. However, all my 7.6 installers install 7.6 and then update to 7.6.1 using the updater. But the 7.6 installer won't run on a Kansas machine because it's not supported, even though I'm not going to boot from the drive, until after I run the updater. Silly Apple. Anyone know of a work around, without digging out another older machine to use to install 7.6? |
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3
Operating System / Speed Doubler
July 12, 2012, 19:52 |
I saw the section on Speed Doubler and wanted to comment. The gist is that if my memory is accurate, Speed Doubler will grant a significant improvement in performance of 68K code on NuBus PowerMacs, but not on PCI PowerMacs. The 68K emulators built into the Apple ROMs convert the 68K code into PPC instructions as the machine marches through the code. Of course, the conversion process requires CPU cycles as well, which is what makes emulation slow. In the original (NuBus) PowerMacs, the emulator converts an instruction, executes it, and discards it. It's like a Basic Interpreter. Speed Doubler is more efficient because it converts sections of code and retains a cache of the converted code for reuse. So looping structures, for example, execute much more quickly. However, if I remember correctly, in the PCI PowerMacs Apple either licensed Speed Doubler's technology or they implemented their own dynamic compiling technology, so there really isn't much advantage in using Speed Doubler on a PCI PowerMac. Although some of the disk and file copy utilities are kind of nice. |
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4
Hardware / 7.6.1 on Beige G3?
July 23, 2010, 18:37 |
Has anyone managed to get OS 7.6.1 installed and workign on a Beige G3? If so, how? |
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