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AuthorTopic: 14mhz 500 hack. Help!  (Read 894 times)

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Offline zx6r6

14mhz 500 hack. Help!
« on: August 31, 2005, 01:07:53 PM »
Performed one of the hacks on Aminet to make my 500 run at 14mhz. It powers up fine but I cannot get any of my internal or external drives(4 tried) to work at the increased step rate. I picked up an A590 the other day but the damn thing doesn't work either! any suggestions!?

Offline patrik

Re: 14mhz 500 hack. Help!
« Reply #1 on: August 31, 2005, 02:19:59 PM »

Which one of those on Aminet did you do? I think this is the only one that will work more or less ok as it has circuitry to avoid double-clocking the E-clock plus some correction of the DTACK-signal.

The other ones just passes all the signals from the 14MHz 68000 unmodified to the motherboard, including a double-clocked E-clock which makes the 8520 chips screw up some of their timings, which you seem to have seen the results of.


Offline zx6r6

Re: 14mhz 500 hack. Help!
« Reply #2 on: August 31, 2005, 03:08:27 PM »
It was basically the same hack thats detailed on this site. Ian mentioned the program DFDELAY but I've been unable to locate it anywhere!