Chris Pile wrote:
> To ensure Defender ran at a constant (99.9% of the time!) 
> 50-fps, all available horsepower needed to be squeezed from 
> the old Z80!

And from what I remember of the code, you certainly did squeeze out every
last drop!  The disk protection was equally crafty, and remains the only SAM
title that neither SamDisk nor MakeSDF can image from an original disk.
Though after a bit of detective work with SAM DICE, I have managed to create
a working image of it with the protection intact.

Si

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