REACTION TIMER for Sinclair ZX-80
by Andy Hope
from Your Computer, June/July 1981

TO RETURN to the infamous cassette interface problems, I found that the
temperature of the regulator had an adverse effect on the ability to load.

Rather than add insulators, I took things one step further by removing the
regulator from the PCB altogether and mounting it in a separate metal box -
thereby also giving it better heat-sinking. This has given me a
greatly-increased load reliability.

The reaction-test program was developed from the program in the ZX-80
manual. It will fir into 1K machines and is self-explanatory.

[A bug appeared in the printed listing in line 250, which should include a
space after the word 'WAS']
