I think the quickest way to do this would be to just use a Basic Stamp
(or a clone), if you want to run a program off an EEProm.  You could
write your own emulator in a PIC, then tokenize some other language
(P-Code, anyone?);  The Basic Stamp's already done, though.  Haven't
really looked this area over a lot, so I'm hoping what others will come
up with (Interested as one project could USE this type of thing!)

(By emulation, I mean you put codes in the EEProm {have to write a
translation program to run on your PC to make these codes from your
source}; the program running in the PIC reads them from the EEProm, and
interprets and acts upon them - it's a little slower than compiling
directly to PIC code {which is in hex numbers, as you mentioned}, but
can be lots more flexible, especially if you do not have a PIC
programmer <G>  The Basic Stamp does the same thing, emulating Basic.)

IIRC some of the newer flash parts allow you to modify program memory,
don't know details but I'm sure others do <G>

Welcome to the list!

  Mark

Mike M wrote:
>
> "i basically want to be able to store a program in the serial eeprom and then
run it through the pic.  wich means the pic must extract the code and then exect
e it.   any ideas ??"
>
> ok im new to the PIC world and EEPROM world.  If i want to write like a list o
f opcodes to an eeprom i can set it up in assembly and then turn the file into a
 HEX file with mpasm and all that i can handle...however, when i download the he
x file into the serial eeprom, when i read it bak through the software in my PIC
 im goin to get like i assume hex number bak, exactly whats written in the PIC.
 How will i convert this bak into the original opcodes.