0001* set to TTY I/O number
0002  00011         SC    EQU 11B

0004  00040               ORG 40B
0005  00040 106700  LOOP  CLC 0        Turn off I/O interrupt system
0006  00041 060051        LDA TTYIO    Load A-register with control word
0007  00042 102611        OTA SC       Output control word
0008  00043 103711        STC SC,C     Set control, clear flag
0009  00044 102311  WAIT  SFS SC       Wait for flag
0010  00045 024044        JMP WAIT     Loop till ready
0011  00046 106511        LIB SC       Input data word
0012  00047 106601        OTB 1        Output data word to switch register
0013  00050 024040        JMP LOOP     Next char
0014*TTYIO OCT 160000B   TTY input and print control word
0015  00051 140000  TTYIO OCT 140000B   TTY input control word
LOOP            000040   01/0005 -- 01/0013
SC              000011   01/0002 -- 01/0007 01/0008 01/0009 01/0011
TTYIO           000051   01/0015 -- 01/0006
WAIT            000044   01/0009 -- 01/0010
4 symbols
15 lines assembled, 10 words generated
0 errors, 0 warnings