IBM System/370 145 Operating Procedures Manual

Also see for System/370 145: Guide Operating procedures Reference Summary

FEATURES (INDICATORS and SWITCHES)Integrated Storage Control (lSC)• This feature supports a one-or-two channel application(with or without the two-channel switch special feature).If you have a single channel application, your ISC featurehas one (1) function ~witch (I/O INTERFACE A). TheI/O INTERFACE Band MULTITAG switches are non-functional. If you have a two-channel application, yourISC feature has the two-channel-switch special feature,and all feature associated switches are functional.IMPL[;] [!] [!] C0KOFF 0" OffISC (Two-channel switch not installed)I/O INTERFACE A (switch)ON: This position makes the ISC Feature available tothe program.OFF:OFF:(lSC not in use) This position removes the ISCfrom use by the program.(lSC in use) This position removes the ISC fromuse by the program only after the system hasentered a manual state (MAN indicator on).I/O INTFS DSBLD (indicator)ON: Indicates that the ISC feature is not available to theprogram. (I/O INTERFACE A switch is OFF.)OFF: Indicates that the ISC feature is available to theprogram.B §~~Dc::J D§J0Do BE]8~~5050~~~~~OOO~O ~~ooo~o~6~000000005e~~6~go6~~o~c~ ~~~~~~oo~0666~666§] B ElGI/O INTFS DSBLD (indicator)ON: Indicates that the ISC feature is not available to anysystem program. (Both I/O INTERFACE A and Bswitches are 0 F F. )OFF: Indicates that the ISC feature is available to theIIse (Two-channel switch installed) system(s) programs.I/O INTERFACE A and B (switches)ON: This position of switch A or B makes the ISCfeature available to the system program using thatparticular channel interface.OFF: (lSC not in use) This position of switch A or Bremoves the ISC feature from use by any systemprogram using that particular channel interface.OFF: (lSC in use) This position of switch A or B removesthe ISC feature from use by the system programusing that respective interface only after that systemhas entered a manual state (MAN indicator on).MULTITAG (non-functional without two-channel switch)• Determines how the disk drive will generate device-end.ON: A drive is available after a channel clears the device-endgenerated by the drive.OFF: A drive is available to either channel after oneof the channels clears device-end generatedby the drive.IMPLCHECKIndicates an unsuccessful tMPL operation in the ISCfeature.System Control Panel Indicators, Switches, and Keys 25