🚀 go-pugleaf

In article <PwoVPFAn90E3EwnL@hilloldridge.demon.co.uk>,
	Graeme Eldred <graemepe@nospam.demon.co.uk> writes:
> In article <ZFa7CCA9wUE3EwHL@dbqa.demon.co.uk>, Tom Bird
> <hamster@nospam.demon.co.uk> writes
>>In article <370f173b.391492@news.demon.co.uk>, Wendy Clark
>><wendy@onepine.demon.co.uk> writes
>>>My next door neighbours computer has slowed right down to a crawl and
>>>I'm at a loss to know why. Win95 has been reinstalled but it takes
>>>minutes to open some applications, access the floppy disk and the cd
>>>drive, open windows etc.
>>
>>Turbo switch?
>>
>>TB
> 
> Tom, what *is* a Turbo switch?  I've got one, it makes a hell of a
> difference, but I don't know what it actually does.

  The 'turbo' switch is a piece of ancient history.

  In the *very* early days of PCs (and I'm going back to the original
IBM PCs here) some software was writen (mostly games) that depended
on the speed of the processor and the ISA bus (5MHz at that time).

  When later machines - like the AT, came out with 8MHz processor and bus
then these games didn't work any longer.  For 'compatability' use
a switch was fitted which reduced the machine back to 5MHz.  This is
the switch known as 'turbo'.  

  Later '386 class machines reduced the ISA bus to 5MHz but the processor
speed wasn't reduced quite so much when this switch was activated.

  There hasn't been any point in this things for *many* years, so it
has been gradualy disappearing from machines. Of the two machines under
my desk at work the P100 has the button, and the PII hasn't.

  Regards,
      Harry.