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*20 /// SAMTTY. /TYPICAL CLK TIC WAITING ROUTINE WITH /TTY INTERRUPT CAPABILITY. /CLOCK SAMPLING ROUTINE. SAMTIM, SET 3 0 PDP PMODE 6131 /?, CLK JMP .-1 /NO CLA /YES 6135 LINC LMODE JMP 3 /END SAMTIM. /TTY CHECKING LOOP. TSTKEY, SET 3 0 IOB 6031 /?, TTY JMP 3 /NO, LEAVE IOB /YES 6036 SAE I 377 /RUBOUT SKP JMP FDONE /EARLY EXIT SAE I 240 /SPACE JMP 3 /BOGUS TTY, LEAVE IOB 6031 JMP .-2 IOB 6036 JMP 3 /END TSTKEY.