By Carl M. Evans

ISBN-10: 0936200294

ISBN-13: 9780936200293

Atari Basic-Faster and Better

Atari details sequence quantity 1

Carl M. Evans

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This may sound easy, but you will find that it really isn't. The problem is that the TkAP stays set until something trips it or another TRAP command is executed. In one program I was working on, I spent hours trying to find out why I was encountering a particular TRAP, time and time again. The answer was almost embarrassing. The trapped portion of the program was not the source of the error. That routine was being successfully executed, and an error was occurring later in the program. The original TRAP was set for one specific kind of error, but once that section of the program was done, I should have set another TRAP to close the first one.

5. When in DOS you can use the binary save command to save the machine language subroutine to disk. To do this, enter a K in response to the DOS menu. DOS will respond with SAVE-GIVE FILE, START,END,INIT, RUN. OBJ,600,622 Remember to use hexadecimal addresses with this command. Ignore the INIT and RUN parameters at this time. 6. From now on, whenever you know that you will be calling the SFILL routine in a BASIC program, you can either perform a binary load (the DOS L command) as described before, or you can use CONVERT to create a BASIC subroutine.

When in DOS you can use the binary save command to save the machine language subroutine to disk. To do this, enter a K in response to the DOS menu. DOS will respond with SAVE-GIVE FILE, START,END,INIT, RUN. OBJ,600,622 Remember to use hexadecimal addresses with this command. Ignore the INIT and RUN parameters at this time. 6. From now on, whenever you know that you will be calling the SFILL routine in a BASIC program, you can either perform a binary load (the DOS L command) as described before, or you can use CONVERT to create a BASIC subroutine.

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Atari BASIC faster and better by Carl M. Evans


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