Amiga.org

Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: zx6r6 on August 31, 2005, 01:07:53 PM

Title: 14mhz 500 hack. Help!
Post by: zx6r6 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!?

Title: Re: 14mhz 500 hack. Help!
Post by: patrik on August 31, 2005, 02:19:59 PM

@zx6r6:

Which one of those on Aminet did you do? I think this (http://de.aminet.net/pub/aminet/hard/hack/new14acc_31.lha) 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.


/Patrik

Title: Re: 14mhz 500 hack. Help!
Post by: zx6r6 on August 31, 2005, 03:08:27 PM

It was basically the same hack thats detailed on this (http://www.ianstedman.co.uk/Downloads/500hacks.txt) site. Ian mentioned the program DFDELAY but I've been unable to locate it anywhere!