OC Systems' LegacyAda/390 is recommended
by IBM as the Ada compiler of choice for System 370 and 390 mainframe
Validated Ada 83 compiler.
Source level debugger, source code formatter, source frequency
analyzer, and cross-reference utility.
Library manager and recompilation list generator.
NUMWG Draft 1.1 math functions support.
Object code transporter utility.
Heap-statistics report generator and execution profiler.
Support for VM/ESA, MVS/ESA, OS/390.
ISPF/PDF panel interface.
Pragma INTERFACE support to VS FORTRAN, VS COBOL II, C/370 and S/370
Pragma EXPORT to allow LegacyAda/390 subprogram calls from VS COBOL
II, VS FORTRAN, C/370 and S/370 Assembly.
Enhanced MVS real-time and input/output support.
Used to develop Air Traffic Control and Defense Systems around the
In cooperation with IBM, OC Systems provides LegacyAda/390, a complete
Ada development environment for OS/390, MVS and VM systems, including
the R/390 and P/390 platforms. With OS/390 and these new platforms,
IBM offers open systems programming in a mainframe environment
as a cost-effective alternative to the workstation environment. The
result is that many customers are migrating Ada applications from
workstations back to the S/390 series computers.