----- Original Message ----- From: "Francesco Messineo" <[email protected]> To: <[email protected]> Sent: Friday, March 16, 2018 5:19 AM Subject: Re: [M100] 8K RAM Chip
On Thu, Mar 15, 2018 at 7:57 PM, Mike Stein <[email protected]> wrote: >> Hi Frank, >> >> How about we split the difference and settle on .73"? >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... ;-) --- >> 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. --- >>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. m
