The Amstrad Trace routine is very unsatisfactory. as it prints the current line number at the cursor position and corrupts the display. The routine here remedies this. Type in the listing, which will Poke in the necessary data in to memory - between &A000 and &A0A7. Run the program, and type: Step.On.Tron to change to the new Trace. Now. on running a Basic program, the line number being currently executed will be printed at the bottom of Window 7, and the program will wait for the Tab key to be pressed before continuing with the next line. To return to normal program control, type: Step. Off.Troff. In the course of execution, the program (obviously) redefines the Tab key. To return to normal, type: Key Def 68,0.9. NB. This was developed and tested on a CPC464 PopularComputingWeekly850926
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