Other Object Types
Cobol, Fortran, and RPG generated object code (type O). Basic was interpreted only; a compilation utility called BASICS created subroutine code (type R). Basic programs could be saved as sources for compatibility with other computers, but the project's text was preserved in the subroutine (unless the programmer used the LOCK parameter to keep it private.)
Procedures, which use OCL to start programs and assign resources to them, are type P.
Source members for all objects are type S, with the exception of Basic as above-specified.
DFU programs generated subroutine (R) code. So did WSU programs.
Screen formats generated object code.
Menus generated object code. A menu is simply a very specific screen format with a companion message member suffixed with two pound signs ("##") to contain the action to be taken when the associated number was chosen. System/34 menus allowed the operator to choose numbers between 1 and 24. On the System/34, a clever programmer could customize a menu using screen format language, but, caution, calling a customized menu that does not conform to exacting system requirements can cause a program error.
Message members generated object code that could be called by a program using the MEMBER OCL statement:
// MEMBER USER1-PROGMSG
Passing a four-digit code to an assembler routine returned the associated text. It was also a clever way for the computer programmer to push up to 10,000 74-byte constants out of program space.
Read more about this topic: IBM System/34
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