$DA09/55817:   Check file type and control mode

Jump from $D866, $D873:

DA09: BC 7A 02  LDY $027A,X     ; pointer in command line
DA0C: B9 00 02  LDA $0200,Y     ; get characters from line
DA0F: A0 04     LDY #$04

Jump from $DA17:

DA11: 88        DEY
DA12: 30 08     BMI $DA1C
DA14: D9 B2 FE  CMP $FEB2,Y     ; control modes 'R', 'W', 'A', 'M'
DA17: D0 F8     BNE $DA11
DA19: 8C 97 02  STY $0297       ; save

Jump from $DA12:

DA1C: A0 05     LDY #$05

Jump from $DA24:

DA1E: 88        DEY
DA1F: 30 08     BMI $DA29
DA21: D9 B6 FE  CMP $FEB6,Y     ; file types 'D','S','P','U','L'
DA24: D0 F8     BNE $DA1E
DA26: 8C 4A 02  STY $024A       ; save

Jump from $DA1F:

DA29: 60        RTS

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