//*
//*  PROBLEM DESCRIPTION(S):
//*    TMVT818 -
//*      MVT TCAM does not provide a way to specify on which
//*      display line the next non-full screen TPUT is to appear.
//*
//*      This usermod adds support for the STLINENO macro as
//*      supported by MVS 3.8 TSO/VTAM.
//*
//*   COMPONENT:  360S-CI555-EBB2218
//*
//*   APARS FIXED: TMVT818
//*
//*   SPECIAL CONDITIONS:
//*     ACTION: IEHIOSUP required:
//*       The IEHIOSUP utility must be run after the link edits
//*       performed by this usermod.  An IEHIOSUP step is included
//*       after the link edits, so no separate run should be
//*       necessary.
//*
//*     DOCUMENTATION:  New STLINENO macro:
//*       STLINENO -- Set Line Number
//*
//*       Use the STLINENO macro instruction to specify the number of
//*       the screen line on an IBM 3270 display terminal on which the
//*       next non-full-screen message should appear.
//*
//*       The format of the STLINENO macro is as follows:
//*
//*        [symbol]     STLINENO      {LINE=number     }[,MODE=ON  ]
//*                                   {LINELOC=address }[,MODE=OFF ]
//*
//*       LINE=number
//*           specifies in decimal the line number on which the next
//*           non-full-screen message is to appear.  The line number
//*           must be a value from 1 to n, where n is the maximum
//*           number of lines allowed for the terminal in use.  Either
//*           the actual line number or a register (2-12, enclosed in
//*           parentheses) containing the line number in the low-order
//*           byte can be specified.
//*
//*           Note:  The MVT implementation operates in the same
//*           manner as MVS 3.8 VTAM2:  LINE=1 does not automatically
//*           clear the screen.
//*
//*       LINELOC=address
//*           specifies the address of a fullword whose low-order byte
//*           contains the number of the screen line on which the next
//*           non-full-screen message is to appear.  Either an actual
//*           address (RX-type) or a register (2-12, enclosed in
//*           parentheses) containing the address may be specified.
//*
//*       MODE=ON | OFF
//*          is accepted for compatibility but performs no function
//*          under MVT.
//*
//*       When control is returned to the user, register 15 contains
//*       one of the following return codes:
//*
//*         Return Code
//*           Dec(Hex)     Meaning
//*         ------------   -------------------------------------------
//*             0(0)       Successful.
//*             4(4)       An incorrect parameter was specified.
//*             8(8)       The terminal type is not valid.  This macro
//*                        instruction is valid only for IBM 3270
//*                        display terminals.
//*             12(C)      The line number specified was 0 or it was
//*                        greater than the maximum number of lines
//*                        allowed for the terminal in use.
//*
//*     DOCUMENTATION:  New STFSMODE macro:
//*       STFSMODE -- Set Full Screen Mode
//*
//*       The STFSMODE macro is provided for compatibility with MVS 3.8
//*       VTAM2 and performs no function in MVT except to set a return
//*       code of zero.  Thus STFSMODE may be used to determine if
//*       usermod TMVT818 is installed.  If TMVT818 is installed,
//*       STFSMODE will return a return code of zero.  If TMVT818
//*       is not installed, STFSMODE will return a return code 4
//*       (invalid parameters supplied to SVC 94).
//*
//*       The format of the STFSMODE macro is as follows:
//*
//*        [symbol] STFSMODE [ ON ] [,INITIAL=YES] [,NOEDIT=YES] [,RSHWKEY=n]
//*                          [ OFF] [,INITIAL=NO ] [,NOEDIT=NO ]
//*
//*       No operands are required.  If operands are specified, they
//*       are syntax checked by the macro and otherwise ignored.
//*
//*       When control is returned to the user, register 15 contains
//*       one of the following return codes:
//*
//*         Return Code
//*           Dec(Hex)     Meaning
//*         ------------   -------------------------------------------
//*             0(0)       Successful (usermod TMVT818 is installed).
//*             4(4)       An incorrect parameter was specified
//*                        (usermod TMVT818 is not installed).
//*
//*   COMMENTS:
//*     LAST CHANGE:  2010/07/09
//*
//*   REWORK HISTORY:
//*     2010/05/04: Original version.
//*
//*     THE FOLLOWING MODULES AND/OR MACROS ARE AFFECTED BY THIS USERMOD:
//*
//*     MODULES
//*       IGC0009D
//*       IGG09412
//*       IGG09413
//*
//*     MACROS
//*       STLINENO
//*       STFSMODE
//*