Re: 6502/6510 ROM selection daughterboard

From: silverdr_at_wfmh.org.pl
Date: Thu, 7 Jun 2012 20:41:49 +0200
Message-Id: <9015294D-3761-4DDE-83DF-B739FE07167D@wfmh.org.pl>
On 2012-06-07, at 14:32, Gerrit Heitsch wrote:

>> Well, you can always use a brute force method, like cutting the +5V  
>> pin
>> - than anyone can do ;)
>
> That would be a bad idea. Most chips don't like it if the voltage on  
> the signal pins is above the supply voltage (look under 'maximum  
> ratings' in the data sheet). That can have all kinds of undesirable  
> effects including destroying the chip.
>
> I give you that it works most of the time anyways. But 'works most  
> of the time' is not a valid state for digital logic. ;)

Is NOT? Really?? One can have serious doubts about it after observing  
the way modern computers work ;-))  [*]

* - some time ago I would say "Windows PCs work" but today I am not so  
strict anymore ;-)

-- 
SD!

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Received on 2012-06-07 19:00:25

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