Meanwhile back at the space invaders game, I wrote my version
about a year ago after I got my programmable graphics board working.
As I had spent a lot of time getting arcade quality graphics on the
game, I wanted to make sure it responded correctly to the keyboard move
and fire buttons (hold to move, fire while moving etc). I have
included below a simplified version of the main loop of the program at
the point where the keyboard is checked. Controls are Z=left, X=right,
I hope this bit of code will be of use to anyone working on
shooting games, like invaders.
Following Mr J-B.Hawkes letter in INMC80-2, it has been brought to our
attention that D.J.Software are no longer trading, and consequently the ZEAP patch
tape is no longer available.