My MVS Playground (Cookbook)

Workflow

TODO...

Acknowledgements

If I have seen a little further it is by standing on the shoulders of Giants.
Isaac Newton.

• First and foremost, I would like to thank Volker Bandke, Juergen Winkelmann, Jay Moseley and Moshix.

About

• This is my playground to learn MVS3.8j/TK4- environment and to test C projects using Linux GCCMVS cross-compiler for MVS.

Dependencies

• A MVS3.8j system:

  • myMVS
  • TK4-.

• GCC C cross-compiler for MVS.

• Use MVS sysgen to generate a custom MVS3.8j.

Projects in progress

• Small programs to demonstrate C programming in MVS.
• A C implementation of VSAM API.
• A web panel editor for FSS API (C Full Screen Interface).
• A LUA port for MVS.
• A database API using TCP/IP interface (EZASMI). A simplified Python script will provide a socket server for database services.

Ideas

• Create a client DB API for MVT Cobol, like Jay Moseley's VSAMIOS.
• A decimal math library similar to COBOL for C.

Playground projects

• This folder contains some programs to test C programming in MVS.

• These programs are compiled inside Linux using GCCMVS to generate source code in assembly.

• I use jobs to send these source code to MVS through Hercules sockdevs (3505 card readers).

• Assembling (IFOX00) and linkediting (IEWL) are executed inside MVS.

01_adder

• C program to receive 2 numbers from JCL (and/or TSO) and add them.

02_multiple

• I cross-compile two C programs in Linux to assembly source code.
• Generated assembly code is compiled using IFOX00 in MVS.
• After, modules are linked using IEWL in MVS.

03_fileio

• C program to read and print a dataset declared in DD JCL.

04_vm

• A tiny toy virtual machine written in C.
• A Fibonnaci algorithm is hard coded in vmcode.c file.

05_netsol

• How to replace logon screen. I am using ANSI2EBCDIC project.

06_database

• A small Python+SQLite database providing a REST API.

07_vsam

• A partial C implementation of VSAM API.
• Author: myself
• Only KSKDS works

08_fss

• Full screen MVS programs using amazing Tommy Sprinkle's "C Full Screen Service API".

• hello - Another ye olde Hello World.

• hello 2 - Yet another ye olde Hello World with colors.

• login - Read a username and password.

• panel - Use Scruples editor to create a complex panel.

• menu - A menu example using a panel.

14_lua (It is not working)

• Yet another not working MVS port of Lua 5.4.
• You can find a working port here.

15_tcpip

• A C-wrapper for EZASMI API and a TCP/IP sample

16_mvsddt

• Using MVSDDT to debug a assembly program.

17_rest

• Frontend: a small program with screens using FSS and a TCP/IP client using EZASMI.
• Backend: a REST API server using a SQLite database to provide persistence.