IBM System/7 Functional Characteristics - All about the IBM 1130 ...

Appendix B. Summary of I/O CommandsSystem/7 I/O commandsPIO instruction Function ModifierDevice addressSubaddressZerosInterval timers (X = timer)Immediate write0 0 1Set timer 0 or 1 0 0 0 0 0 0 0 X 0 0Stop timer 0 or 1 1 0 0 0Start timer 0 or 1 1 0 0 1Immediate read 0 1 0Read timer 0 or 1 1 0 0 0 0 0 0 X 0 0ACCAImmediate write 0 0 1Diagnostic write 0 0 0 0 0 0 1 1 0 0Transmit character 0 0 0 1Reset ACCA 1 0 0 0Transmit control 1 0 0 1Immediate read 0 1 0Read ISW 0 0 1 1 0 0 1 1 0 0Read character 1 0 0 0BSCAImmediate write 0 0 1Write address 0 0 1 1 0 0 1 1 0 0Initiate I/O 0 1 1 1Write diagnostic control 1 0 1 1Reset BSCA 1 1 1 1Immediate read 0 1 0Read ISW 0 0 1 1 0 0 1 1 0 0Read ISW extension 1 0 1 1Read residual address 1 1 1 15028 Operator StationImmediate write0 0 1Turn-off motor and lock keyboard 0 0 0 0 0 0 1 0 0 0Print only 0 0 1 0Punch only 0 1 0 0Print and punch 0 1 1 0Turn-on motor 1 0 0 0Keyboard entry and no print 1 0 0 1Keyboard entry and print 1 0 1 1Feed tape and no print 1 1 0 0Feed tape and print 1 1 1 0Immediate read 0 1 0Read ISW 0 0 1 1 0 0 1 0 0 0Read character with tape feed 1 0 0 0Read character without tape feed 1 1 0 0Summary of I/O Commands B-1