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| Report | FZJ-2016-07059 |
1979
Kernforschungsanlage Jülich GmbH Zentralbibliothek, Verlag
Jülich
Please use a persistent id in citations: http://hdl.handle.net/2128/13103
Report No.: Juel-Spez-0061
Abstract: This documentation gives technical information on the adaption o f VSAPL to the TSS env ironment. VSAPL has been implemented torun as an interactive subsystem under TSS and serves as a tool for interactive problem solving in the scientific as well as in the administrative area. The TSS adapti-0n provides a complete implementation of VSAPL, including also the full concept of shared variables. While preserving compatibility, it was our aim to improve the performance of VSAPL by utilizing the advantages of TSS as much as possible, especially concerning the transfer of big amounts of data between external storage and virtual memory. The standard auxiliary processors for sequential I/O, for issuing commands of the underlying operating system, and for stacking VSAPL input have also been converted. Besides that, means are provided to enable the users to write their own auxiliary processors. VSAPL workspaces created under VSPC, CMS, or TSO can easily be converted to TSS format, and vice versa. Utilities to convert workspaces from APL/360 or APLSV have not been implemented. Support is provided for most terminals with APL character set. Insertion of character translation tables for new terminals is easy. Design considerations for this work began in 1976 when the VSAPL system emerged to be an affic ient and modular APL system with a clean intetface to all IBM operating systems except TSS. These considerations were complemented by discussions with IBM TSS Marketing and Support Group and with Yale University whose TSO adaption seemed to be a mod·el for the work to be done. The major part of tbe implementation has been completed in 1977, while special supplements concerning shared variables and performance improvements have been added in 1978 and 1979. Further maintenance will be done in close cooperation with the TSS group. The author would like to thank F. Hossfeld and H.W. Homrighausenfor continuous support of this work, D. Bar tel, D. Erwin, and K. Wolkersdorfer for useful discussions and suggestions, and Mrs. K. Baumann for assistance in generation and documentation of the system. Thanks are also due to IBM Corporation, especially to E. Mohr who assisted me in utilizing the TSS peculiarities, and to Yale University Computer Center for the readiness in providing us with information on the TSO adaption. We also appreciate the help of W. Hahne, DKFZ Heidelberg, concerning the support of the I/O cruxiliary processor and of the 3270 data analysis feature.
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