M/C BREAK

[file: M/C Break]



First up this month is a program from Andrew Vellacott of Essex who

got so fed up with his machine code programs getting stuck in infinite

loops during development that he wrote this short routine which makes

use of the Spectrum interrupt mode two to scan for the BREAK key being

pressed.



Two minor points to note: First you will have to reinitialise the

routine each time after BREAK is pressed with RANDOMIZE USR 32377; and

secondly, machine code or BASIC loader programs must not occupy the

addresses from 32348 to 32375. [Actually ends at 32383. The READ loop

in the listing was wrong as well, although the DATA statement was

correct. JimG]



A useful aid for machine code programmers.