Re: MAX Machine PLA equations

From: Gerrit Heitsch <>
Date: Sun, 7 Aug 2016 14:34:16 +0200
Message-ID: <>
On 08/06/2016 09:27 PM, Michał Pleban wrote:
> Hello!
> Segher Boessenkool wrote:
>> It depends on what the capacitance is, and how big the leakage is.
>> You're much more likely looking at milliseconds instead of nanoseconds.
> For what it's worth, I made a scope plot of A15 and CLK0 on a running
> machine. You can see it here:
> It looks strange - sometimes A15 looks as if pulled high during VIC
> access, and someimes not. I don't know what to make of it.

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.


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Received on 2016-08-07 13:00:12

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