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 had a eureka moment.
Preparing notes for the EPROM project I had a look at the schematics and then it hit me.
Practical problem with EPROM emulation are the 2-byte wide parallel interface needed.
What if we skip that side of the memory control and let the clock on the voice card simply control a modern serial EEPROM, or better - a (micro)SD memory card?
Write up and notes on its way, updated frequently so for those interested please refresh. And as always, corrections and direction are welcome.
http://snw.lonningdal.no/ sds7eprom.php#sd
--hans