Re: The ultimate UltiMax cartridge

From: Rob Clarke <>
Date: Tue, 22 Oct 2013 22:39:40 +0200
Message-ID: <>
Hi Michau,

Looking at your expression for the latch CLK:

> 74LS273.CLK = /EXRAM & 74LS273.Q7
> So as long as we write values to the latch with it 7 set to 0, the latch
> still operates. But if we set bit 7 to 1, the latch becomes inactive. In
> such case, the RAM will become active, because:
As the latch latches (?) on the rising edge and /EXRAM is active low, 
don't you want a NOR gate here?


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Received on 2013-10-22 21:00:09

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