Quick Mode for 1500-1000

We leave the wonderful world of true hi-res for a moment, to show you just one of any number of fascinating possibilities that can result from experimenting with the ZX81’s interrupt-driven display routines.

Those of you who have played with Wilf Rigter’s “Nova” package already know of some of the neat things you can do by “messing with the interrupts.” For instance, smaller displays can be created to increase the time available for computing, thereby speeding up the machine by up to 4 times the normal “SLOW” mode rate.