[sdiy] self-modifying code was: Re: My latest project

[Neil Johnson]

Hi,

cheater cheater: 
> Out of curiosity: how difficult is it to keep program data in RAM?

If its Harvard then you cannot execute code in data RAM.  The ARM-based micros (e..g NXP family) are VonNeumann so you can execute from the internal RAM, which is handy during development (fast run-debug-reload cycle).

> And similarly.. how does SMC work with FPGA's and its family? Is it
> even possible?

Depends on what memory architecture you implement.  Its possible - pretty much anything is if in FPGA.

Bit seriously, avoid self-modufying code if you can - its a bugger to debug, has performance penalties, has a range of interesting and subtle gotchas, and there are a lot of other less risky approaches.

Neil
--
http://www.njohnson.co.uk