How I test the computers

Spectrums:

2 Hour Retroleum Diag. ROM.  RAM test.

Load a BASIC program.

Edit a BASIC program.

Save a BASIC program.

6 Hours BASIC Program Test. The program continuously reads, writes and compares random memory blocks while displaying a simple graphical bar set to show activity and how many iterations it has done.

4 hours of game code in Demo Mode with Joystick connected and working I use Astro Blaster from Quicksilva. First I shoot down a few aliens, enter my hi score then leave it in demo mode. When  the 4 hours are over I check I can still shoot aliens and enter another hi-score.