>In fact, I have:
>SE/30 030/50MHz/128MB
>Mystic 040/FPU/43MHz/132MB
Do you have 70ns VRAM in the Mystic 040 ? If so, where did you find it ? I
haven't been able to locate any.
I just received a 20 MHz crystal (yesterday) to run mine at 40 MHz, but my
VRAM is 80ns and I'm not sure if it will work without video problems. I
hesitate to install it without first getting some faster VRAM.
>Mystic 601/120MHz/36MB (I found it could run even I
>removed the 040)
I'm guessing that you have a 20 MHz crystal in this 575 board which forces
the 601 (originally a 100 MHz PPC upgrade) to run at 120 MHz (3x 040 speed),
correct ? How does it perform ?
>PPC/CC 6500 (under construction)
>I think system 7.1 is the best choice for SE/30.
It certainly is for your 50 MHz SE 30 with 128 MB :)
>How about the 575 (Mystic) ? Is the 7.1 only has the
>advantage of using
>.less RAM over the 8.1 ? How about the speed ?
8.1 is a little bit slower on the desktop and slower to startup for sure.
Once it loads up, it's fine. It really doesn't feel slow, even at 33 MHz,
which is what my Mystic runs at.
>If the
>speed are within
>5%, then may be I should consider to use 8.1 rather
>than 7.1 ?
I don't know the exact percentage of slowdown you will experience with 8.1.
Since you have your Mystic running at 43 MHz, I would probably use it. Your
machine is quite fast and should run it well. You've built a machine for
lifting heavy weights. If it was mine, I would want to give it some weight
to lift just to see how it performs. You can always go back to 7.1, 7.5.5,
or 7.6.1 if you find 8.1 unsatisfying.
My notion of the perfect OS for an 040 Mystic is as follows :
1. OS 8.1 on the Hard Drive.
2. System 7.1 on a RAM disk. You could have it on a CD (which you would
burn after a full installation of the OS and whatever extensions, control,
panels, drivers etc. that you want to run) and copy it to your RAM disk and
restart from your RAM disk (assuming you have an external CD ROM).
It is also possible to install 7.1 onto a RAM disk, rename the system folder
on the RAM disk and copy it to your Hard Drive. Then, whenever you want to
run 7.1, you just drag it back to your RAM disk, re-bless the system folder,
select RAM disk in the startup disk control panel, name the system folder
back to "System Folder", and re-start. This would be extremely fast. With
132 MB RAM you could run a large RAM disk with room for all kinds of
extensions, whatever you want really. You could even install some
applications onto it if you wanted to. They would start up almost
instantly.
>And for the 601, it could use 7.5 up to 8.1, with 36MB
>RAM, which is
>better ?
I would still use 8.1, although it will use up a large portion of your RAM.
Depending on the software you run, you may need RAM doubler or virtual
memory at times, which would be undesirable. From what I've read on the CC
forum, 64 and 128 MB SIMMs won't work with the PPC upgrades, which is
unfortunate. Your chosen configuration seems to confirm this.
If RAM becomes a problem, I would try 7.5.5 or 7.6.1, which will save you 3
or 4 MB.
>I think the newest OS for 6500 (even with G3/L2) is OS
>9.x, right ?
Yes, although their are unsupported methods of running OS X on certain PCI
PowerMacs. Not sure if the 55/6500 series is one of the models that this
works on. I think there is even a new LEM mailing list for this topic now.
MJF
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