INMC 80 News


February–April 1981 · Issue 3

Page 13 of 55

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, Newline=fire:

I hope this bit of code will be of use to anyone working on shooting games, like invaders.

Yours faithfully,

D. Ritchie.


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.

Page 13 of 55