AmstradCPC6128-hypertext-en-Sinewalker

ERR may also return 3 1 if access was attempted when no file was open. The usual
way in which one may use ERR and D ERR would be to include an 0 N
ERR 0 R GOT 0 which calls a short routine that checks if ERR has the value 3 1 or
32, and if it is 32, DE R R could be interrogated to give more detailed information
regarding the nature of the error. For example:
10 ON ERROR GOTO 1000
20 OPENOUT "myfi le.asc"
30 WRITE #9,"test-data"
40 CLOSEOUT
50 END
1000 amsdoserr=(DERR AND &7F):REM mask off bit 7
1010 IF ERR