PDP-8 TTY Output of All Values

This program writes all values (from 0000 through 7777) to the TTY output port. Granted, only the lowest 8 bits are used, but there's no harm in setting the other bits in the AC.

         0000 7200 cla          / clear accumulator
         0001 6046 tls          / dummy write (to clear flag)
loop,    0002 6041 tsf          / skip if flag set
         0003 5002 jmp   loop   / loop waiting for flag to clear
         0004 7001 iac          / next character
         0005 6046 tls          / write character to TTY
         0006 5002 jmp   loop   / loop for next character