On Fri, Mar 16, 2018 at 4:02 PM, Mike Stein <[email protected]> wrote: > ----- Original Message ----- > From: "Francesco Messineo" <[email protected]> > To: <[email protected]> > Sent: Friday, March 16, 2018 5:19 AM > Subject: Re: [M100] 8K RAM Chip > > > >>Well, I don't know, my 700 mils modules work well, I think the difference is >>so relevant. > > (I guess you meant irrelevant?) That's what I thought, until you brought it > up... ;-)
well yes, that's what I meant to write. I was sure the spacing was right 700 mils as it worked for me. > --- > >>> As to using diodes, I've often used this technique... > >> I think it can be done, but you anyway need logic to reconstruct the >> addresses, so why bother with diodes? > > Diodes can be used as logic elements; as a matter of fact, before TTL there > was DTL (Diode-transistor logic): > https://en.wikipedia.org/wiki/Diode%E2%80%93transistor_logic > > That's how they're used in this case to form three AND gates. yes, I know the history :) > --- >>>I use only one logic chip for all the work. > > I'm not saying that diodes are a better way of doing it, just that it's a > different approach used by at least one of the commercial modules. I was only wondering if they checked the standby current draw, that's all. Frank
