Is the 14 Mhz hack worth it!

[Oldsmobile_Mike]

At the end of the day I was wondering if anyone had tried it.  or if CIA chips blow up

I think you'd have more to worry about from floppy drive timing.  Isn't this the hack that screws that all up?

IMHO I was interested in it some years back but the amount of work wasn't worth my time.  Get a 68010 for the 2-5% boost it gives you for $5 on ebay (and be able to make use of the 'quit' key in WHDLoad), then add some fast ram for the 20-25% increase that gives you.  Much better bang for your buck if you want to slightly boost a low-end machine.  

That being said, if you try it let us know how it goes, and post some pictures!  

[Oldsmobile_Mike]

No, that should be harmless. The average 14Mhz hack only speeds up the CPU, but none of the external chips that are not designed to run at a higher clock rate anyhow. The timing for the disk drives is derived from the timer.device, and hence from the CIA hardware timers that still run at ~700Mhz. Hence, no problems to be expected.

Otherwise, what would a floppy do with a 68060@50Mhz? (-:

Here is where I got that information from.  Memory's not what it used to be, but I knew I wasn't making it up.  

http://aminet.net/package/docs/hard/14MhzA500

trackstep.doc

[FONT="]If you have performaed the 14Mhz modification and find that you have disk
errors, it is probably because of the track stepping speed having been
altered.
All of the disk read/write operations aren't directly controlled
by the 68000 cpu so our sppedup mod shouldn't affect this. However the
track stepping on the drives is controlled directly by the CPU.
Normally the trackdisk.device uses a value of 0BB8 as a count between it
when it should send step pulses to the drives. At high speed the time taken
for the count will diminish, in some cases to a point where the step pulses
are sent to the drive quicker than it's track to track access time which
could be around 20ms.While using an 80track 5 1/4" drive with a 5ms track
time there is no problem whatsoever, however with the internal drive on some
machines they cannot keep up with the cpu.
[/FONT]
 

I take no credit for the reliability of this (nor blame for any lack thereof), just copying & pasting.  

TL;DR.  Nearly all accelerators contain separate oscillators and logic for the processors anyway, so they're independent of any system timings.  The 68060@50Mhz example is irrelevant.  :lol:

[Oldsmobile_Mike]

This information is not quite accurate. Actually, the trackdisk device

Thanks for helping clear this up!

IMHO I hope OP does do this hack.  I remember lots of people talking about it back in the day, but I can't remember anyone actually doing it.  Good luck with it, hope you don't blow up your Miggy! :banana:

[Oldsmobile_Mike]

One should always only change one variable at a time when experimenting.

That, sir, is not the Amiga way.  :roflmao:  :roflmao:

[Oldsmobile_Mike]

But is it compatible with old floppy games?

There's this little thing called WHDLoad...  :rolleyes:

[Oldsmobile_Mike]

I was sorely disappointed with the AdSpeed, too.  I didn't get even close to 2x, and while it wouldn't crash if it was alone in the system, it was incompatible with every expansion I had!  ICD was infamous for selling hardware that would not play nice with stuff from other makers.

Boy did I lust after the AdSpeed in magazine adverts at the time.  I don't think it was ever good for 2x speed, maybe closer to 30% because it had the onboard cache?  That incompatibility though!