Re: Hardware-based vs software-based emulation

From: Francesco Messineo <>
Date: Wed, 22 Feb 2017 09:35:09 +0100
Message-ID: <>
On Wed, Feb 22, 2017 at 9:11 AM, Gerrit Heitsch
<> wrote:
> On 02/21/2017 09:56 PM, smf wrote:
>> This thread has a schematic
>> It looks like he did alot of testing and had to change a few things each
>> time he hit a problem.
> Yes... And he still uses /CASRAM as /CS without OR with /RAS. That is not
> stable, he can only get away with it since he uses such a slow RAM (100ns),
> but it's not guaranteed to work in all instances and PLA versions.
> Also, I don't quite understand what he was doing with the diodes and using
> anything but plain MA0-MA7. If you use those, you can make a plug in module
> for the RAM without needing any other signals (despite what was being said
> in the thread)

I also didn't get why he needed a '245... but as I didn't try myself
(and I'm not going to try), I stop arguing.


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Received on 2017-02-22 09:01:11

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