Re: FLASH ROM incompatibilities with C128

From: Gerrit Heitsch <*gerrit_at_laosinh.s.bawue.de*> Date: Wed, 05 Dec 2012 17:03:38 +0100 Message-ID: <50BF705A.7090605@laosinh.s.bawue.de> · gerrit_at_laosinh.s.bawue.de

On 12/05/2012 03:46 AM, Bil Herd wrote:
> The 6502 architecture can suffer in one area in particular with faster
> parts on read cycles and that is at the end of the cycle; Fast parts
> sometimes are faster to release data and let it go invalid.  The '02
> family can require 5-10 ns of hold time which might as well be forever if
> you don't have it.

If that's the case, then all you'd have to do would be to delay the _CS 
signal for the Flash through 4 or all gates of 74LS04.

  Gerrit

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