In SX Microcontrollers, SX/B Compiler and SX-Key Tool, George Herzog wrote:

Well, in my reading I have come across a need to add eeprom to an SX-28.
 

There seem to be so many types of eeprom, I was wondering if someone might bring me up to speed on what is optimal.  

 

First purpose is primarily DATA

I presume there is some kind of 'flash' eeprom that can be programed with the SXes themselves.  This would be a big advantage and I am wonder about how that process can be easily set up.

 

I am not trying to reverse engineer the BasicStamps.  I just want to know how to expand the capabilities to include more data [let's say for a menu set in an LCD output or for a lengthy data scheme to output controled pulses or voltages via pulses].

 

In the back of my mind is alsol the ever alluring idea of adding RAM to collect data for later transmission.  But that is really secondary.

 

Second purpose is to expand PROGRAM code.

I do understand that program code is 14bits wide and would require two byte pairs to retain it.  I am a bit fuzzy on the possiblity to actually move it into any place where it can become useable.  I presume that I would have to move blocks of it to pages of RAM and have a resisdent sub-routine put it into play.  Obiviously this may slow code processing by a factor of 10 or more and it looks like I might have to jump in and out of an ISR to store a return location for the program thread.

 

Am I right or just imagining things?

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