The first time I encountered turbo buttons was in IBM ATs (or
compatible), where they reduced the CPU speed to roughly that of an IBM
XT. Otherwise older programs would run way too fast. Once the PCs left
the binary area (XT or AT), the button got a bit useless -- programs had
learned to use timers by then anyway.
I remember fixing a lot of performance issues by pushing that button
back in.
Peter
On 16/02/10 20:35, Christian Catchpole wrote:
i guess the button was quite advanced by the time it got to 16/20 Mhz.
I just remember a friend who had a 286 which was 4 and 8 mhz from
memory.
my amiga was 7.12 but it had a "chipset" and a high bandwidth blitter.
as for modern over-clocking it just depends on how conservative the
ratings are to start with. i guess it's about reliability and heat
disbursement.
On Feb 16, 7:35 pm, Casper Bang<[email protected]> wrote:
The turbo button on old computers was not an over-clocker, it was
simply a clock-halver.
I'm pretty sure my old 386 would go from 16 to 20 Mhz when I pressed
the turbo button though. But obviously clock-halvers were easier to
make, since all you needed was a flip-flop (2 NAND gates).
I do remember my girlfriend's father never used the turbo button
because he thought it would hurt the computer.
My my have we come far, today computers are 20-30% over-clocked from
the factory.
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