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File os_390.txt

*os_390.txt*    For Vim version 8.0.  Last change: 2016 Feb 27

VIM REFERENCE MANUAL	  by Ralf Schandl

*zOS* *z/OS* *OS390* *os390* *MVS*
This file contains the particulars for the z/OS UNIX version of Vim.

Contributors: ~
The port to z/OS UNIX was done by Ralf Schandl for the Redbook mentioned
below.

Changes, bug-reports, or both by:

David Moore
	Anthony Giorgio
	and others

==============================================================================
1. ASCII/EBCDIC dependent scripts	*OS390-has-ebcdic* *zOS-has-ebcdic*

For the internal script language the feature "ebcdic" was added.  With this
you can fix ASCII dependent scripts like this:
>
    if has("ebcdic")
	let space = 64
    else
	let space = 32
    endif
<

==============================================================================
2. PuTTY and Colors			*OS390-PuTTY* *zOS-PuTTY*

If you see problems with syntax highlighting or screen corruptions when you
connect to z/OS using Putty, try the following:

- Configure Putty as "vt220" terminal (Connection->Data)
- Add the following 3 lines to your vimrc:

>
    set t_AB=[4%p1%dm
    set t_AF=[3%p1%dm
    set t_CO=8
<

Note:  is one character use <C-V><Esc> to enter it.

==============================================================================
3. Motif Problems			*OS390-Motif* *zOS-Motif*

Note: Seen with Vim 6.*, never tested since.

It seems that in porting the Motif library to z/OS, a translation from EBCDIC
to ASCII for the accelerator characters of the pull-down menus was forgotten.
Even after I tried to hand convert the menus, the accelerator keys continued
to only work for the opening of menus (like <Alt-F> to open the file menu).
They still do not work for the menu items themselves (like <Alt-F>O to open
the file browser).

There is no solution for this yet.

==============================================================================
4. Bugs					*OS390-bugs* *zOS-Bugs*

- Vim will consistently hang when a large amount of text is selected in
  visual block mode.  This may be due to a memory corruption issue.  Note that
  this occurs in both the terminal and gui versions.

==============================================================================
5. Limitations     			*OS390-limitations* *zOS-limitations*

- No binary search in tag files.
  The program /bin/sort sorts by ASCII value by default.  This program is
  normally used by ctags to sort the tags.  There might be a version of
  ctags out there, that does it right, but we can't be sure.  So this seems to
  be a permanent restriction.

- The cscope interface (|cscope|) doesn't work for the version of cscope
  that we use on our mainframe.  We have a copy of version 15.0b12, and it
  causes Vim to hang when using the "cscope add" command.  I'm guessing that
  the binary format of the cscope database isn't quite what Vim is expecting.
  I've tried to port the current version of cscope (15.3) to z/OS, without
  much success.  If anyone is interested in trying, drop me a line if you
  make any progress.

==============================================================================
6. Open source on z/OS UNIX		*OS390-open-source* *zOS-open-source*

If you are interested in other Open Source Software on z/OS UNIX, have a
look at the following Redbook:

Mike MacIsaac et al
    "Open Source Software for z/OS and OS/390 UNIX"
    IBM Form Number: SG24-5944-01
    ISBN: 0738424633
    http://www-03.ibm.com/systems/resources/servers_eserver_zseries_zos_unix_redbook_sg245944.pdf

Also look at:
    http://www.redbooks.ibm.com
    http://www-03.ibm.com/systems/z/os/zos/features/unix/
    http://www-03.ibm.com/systems/z/os/zos/features/unix/library/IBM+Redbooks/index.html

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