Re: MAX Machine PLA equations

From: smf <*smf_at_null.net*> Date: Sun, 7 Aug 2016 13:40:59 +0100 Message-ID: <66ede3f4-3d4b-0b4f-8429-19c91ac3121c@null.net> · smf_at_null.net

On 07/08/2016 13:34, Gerrit Heitsch wrote:
>
> The 6703 is not a PLA as the 82S100, so in theory, MOS could make some 
> of the inpute bidirectional. Like use A15 as an input when the CPU has 
> the bus and drive it high or low when the VIC has the bus.

It could, but that should be relatively simple to detect by dumping it 
again with a15 as as output rather than an input. Dumping it with a pull 
down resistor (and again with a pull up resistor) may help highlight if 
it is ever driven.

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