C64 ROM: Routine at FF90

Used by the routines at A474 and A871.

this routine controls the printing of error and control messages by the KERNAL. Either print error messages or print control messages can be selected by setting the accumulator when the routine is called. FILE NOT FOUND is an example of an error message. PRESS PLAY ON CASSETTE is an example of a control message. bits 6 and 7 of this value determine where the message will come from. If bit 7 is set one of the error messages from the KERNAL will be printed. If bit 6 is set a control message will be printed.

Used by the routines at A474 and A871. this routine controls the printing of error and control messages by the KERNAL. Either print error messages or print control messages can be selected by setting the accumulator when the routine is called. FILE NOT FOUND is an example of an error message. PRESS PLAY ON CASSETTE is an example of a control message. bits 6 and 7 of this value determine where the message will come from. If bit 7 is set one of the error messages from the KERNAL will be printed. If bit 6 is set a control message will be printed.
FF90	4C 18 FE	JMP $FE18	control kernal messages