* DEMO: HELLO WORLD ON TTY
     ORG   '1000
STRT LDA   N7
     TCA
     STA   0
LC   LDA   MESS,1
     ICA
     JST   ASRO
     ICA
     JST   ASRO
     IRS   0
     JMP   LC
     HLT                     READY
     JMP   STRT              PRINT AGAIN
*
* MESSAGE TO PRINT
     BCI   6,HELLO WORLD 
     OCT   '106612           CRLF
MESS EQU   *
N7   OCT   7                 LENGTH IN WORDS
*
* TTY OUTPUT ROUTINE
ASRO DAC   **
     SKS   '104              WAIT FOR READY
     JMP   *-1
     OCP   '104              SET OUTPUT MODE
     OTA   '4                PRINT CHARACTER
     JMP   *-1               WAIT FOR READY
     JMP*  ASRO
     END