Thanks for all the input so far. Just when I think I have closed my mind to a particular direction, someone throws new light and I find myself needing to re-assess. All of the above is useful (OK, maybe not the Coventry stuff) but a few special mentions to...
I am liking Yan's suggestion as we can do very simlpe stuff, but really get our hands dirty with the translation to Hex codes, etc.
... plus I learned to do machine code on a Science of Cambridge Mk14 with its bubble keyboard and 7-segment LED display - the Acorn is giving me fond memories
And yes, 10 hours is stupidly little - remember, these students have never even seen computer code at high level before !!
@kevin8084: Thanks for your link - good source of further links there
I am liking Yan's suggestion as we can do very simlpe stuff, but really get our hands dirty with the translation to Hex codes, etc.
... plus I learned to do machine code on a Science of Cambridge Mk14 with its bubble keyboard and 7-segment LED display - the Acorn is giving me fond memories
And yes, 10 hours is stupidly little - remember, these students have never even seen computer code at high level before !!
@kevin8084: Thanks for your link - good source of further links there