2.2 The IBM 7171 ASCII Device Attachment Control Unit - Index of

C.8 7171.COM Menu Driven ScreensC.S.l Advantages7171.COM provides menu driven screens for data entry. The prime advantage isthe user only needs to fill in the blanks. As the user enters data, the 7171.COMverifies that the data entered is consistent with data currently stored (may bedefault values). Even though 7171.COM warns the user of his errors and contradictions,it doesn't inhibit processing. It will allow the processing to proceed. If theuser means to have some contradiction of data, 7171.COM will allow it. With7171.COM, the user may choose between entering the hexadecimal values of characters,or the user may enter the actual keystroke if in BINKEY mode. Forexample: IB=ESC, the user may choose the BINKEY mode, and press the ESCkey which would input IB which is the hex value for escape.C.S.2 Limitations7171.COM provides fill-in-the-blank type screens for the user. With 7171.COMthere will be room for approximately 10 user defined terminals. The actual numberof tables will vary depending on the size of each terminal definition table defined.Also, only the default translate tables may be used, unless a user patches in thecorrect translate table and addresses.Here are the calling paths between the various screens.7171MAIN (7171)IPORTSIII ILOAD CONFIGITERMSIIIIIIEDIT.CTL LINK I/OIIII ISAVE REPORT I LOAD EDIT SAVEIIII I ILOAD EDIT SAVE REPORTFigure C-2. Calling Tree of IBM 7171 Support FunctionsAppendix C. IBM 7171 Support Utility for Modifying Terminal Tables C-9