program to output 'ABC' to output device.txt

.program to output 'ABC' to output device
.2345678901234567890123
OUT      START   1000
         LDA    #65
         JSUB    WRITE
         LDA    #66
         JSUB    WRITE
         LDA    #67
         JSUB    WRITE
         J       EXIT
.
.
.output subroutine
WRITE    TD      OUTDEV
         JEQ     WRITE
         WD      OUTDEV
         RSUB
OUTDEV   BYTE    x'06'
EXIT     END     OUT