On 28 March 2002 in response to my question:

>>...will this [Quadra 800] boot from a CD? I have made a CD copy of 
>>the system folder (7.5.1), but it won't boot the machine even when 
>>it's set as the startup disk (SCSI ID is 3). I can't seem to bless 
>>the system folder, either on the Quadra or by copying it to an 
>>iMac, so I guess this could be the reason it won't start from the 
>>CD. Any ideas?

  the pickle wrote:

>What are you using to make the CD? Older versions of Toast (prior to 
>4) had some quirks that made the creation of bootable CDs a rather 
>black art.

Problem more or less solved. I'm using Toast 5 Titanium, so that 
wasn't the issue. The difficulty I had was in creating a blessed 
System folder with a Mac face on it. The iMac seemed reluctant to do 
this (I guessed because 7.5.1 68k won't run on the iMac, though I'm 
sure someone will correct me), and I had trouble doing it on the 
Quadra because I don't have a removable drive attached. Anyway I got 
there in the end -- not sure how. Once I had a face on the System 
folder, Toast created a bootable CD without problems.

My version is very flaky, perhaps because I have the wrong CD driver 
extensions. When I boot from the CD, opening or closing windows by 
double-clicking the CD icon itself appear to "put away" the CD, and 
the system crashes. However, in the Apple menu I placed aliases to 
folders and applications such as Norton, and these open and close OK.

Strange stuff, but probably easily solved with an overhaul of my 
ancient and borrowed copy of 7.5.1. My question was really whether 
the Quadra was capable of booting from a CD, and evidently it is. End 
of problem, but thanks for your attention.

Out of interest, what's the "best" OS to run on this machine? It 
originally came with 7.1, and I found 7.5.1 worth the upgrade -- very 
stable. I guess Systems 7.6 and 8 brought further improvements, but I 
never got around to trying them.


-- 
--
Charles Butcher
Coventry, UK

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