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Subject: Re: [Simmons Drums] Re: Q: SDS7 4 e-prom analog/digital card

From: Ewan Colsell <ewanuno@...>
Date: 2017-01-27

Is an atmega328 actualy fast enough to do this directly on the I/o pins?

I suspect that reading from an SD card takes a loooong time on arduino.

I was looking Into how EPROM emulators work, and what I found was that most of them are just a ram chip that gets data loaded into it from a host computer. This frees you from the timing problems at the cost of increasing your part count..

Ewan



On Jan 25, 2017 20:02, "hr.public@... [Simmons_Drums]" <Simmons_Drums@yahoogroups.com> wrote:
 

I just hada eureka moment.

 

Preparingnotes for the EPROM project I had a look at the schematics and then it hit me.

Practical problemwith EPROM emulation are the 2-byte wide parallel interface needed.

What ifwe skip that side of the memory control and let the clock on the voice card simplycontrol a modern serial EEPROM, or better - a (micro)SD memory card?

 

Write upand notes on its way, updated frequently so for those interested pleaserefresh. And as always, corrections and direction are welcome.

http://snw.lonningdal.no/ sds7eprom.php#sd

 

--hans