Solaris 7 (SPARC Platform Edition) Installation Library

SPARC: Solaris 64-bit Operating Environment

The 64-bit Solaris operating environment is a complete 32-bit and 64-bit application and development environment supported by a 64-bit operating system. This permits maximum compatibility and interoperability for existing applications, both source and binary. At the same time, the 64-bit Solaris operating environment overcomes the limitations of the 32-bit system, most notably by supporting a 64-bit virtual address space and removing other 32-bit system limitations.

The key limitations overcome by the 64-bit Solaris operating environment are the following:

The compatibility and interoperability in the 64-bit Solaris operating environment is so complete that there is no noticeable difference. Existing applications just work and PATH settings remain unchanged.

The new isainfo program helps determine whether you are running on a 32-bit or 64-bit system. isainfo prints information about all the supported Instruction Set Architectures (ISA) of the running system.

Finally, there is the option of booting either the 32-bit or 64-bit Solaris operating environment on UltraSPARC machines.

See "Software Developer Environment" for more detailed 64-bit information for developers. Also, for more information on using the 64-bit operating system, see Solaris 7 64-bit Developer's Guide.