Chilton::ACL::SPROGS Manual

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Early history □ Minutes of committee meetings □ Progress reports □ Other reports □ News cuttings □ In-house publications □ Committee papers □ Personal recollections □ ACL publications □ Books □ Early Atlas publications □ FR80 reports □ Atlas manuals □ ICL1906A manuals □ Other manuals

Overview □ ICL1906A reference manual □ CAMPER (Computer Aided Movie Perspectives) □ CASS (Computer-Aided Sound Synthesis) □ COCOA □ FOG manual □ FR80 user manual □ GROATS (Graphics system) □ PIGS □ PLASYD □ SMOG □ SMOG/SPROGS primer □ SOL □ SPROGS (SD4020 PDP15 Rapid Output Graphics System) □ SPROGS supplement □ TASK □ TREE-META translator writing system

Further reading □ Contents □ 1. Introduction □ 2. Regions □ 3. Display routines □ 4. SPROGS files □ 5. The file format □ 6. Character fonts □ 7. Index variables □ 8. Efficiency of picture storage □ 9. The sequence list □ 10. Further facilities □ 11. SPROGS on the 1906A □ 12. An example film □ 13. SPROGS preprocessor □ 14. Future extensions □ Appendices

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⟶ ACL ⟶ Literature ⟶ ICL 1906A manuals ⟶ SPROGS

⟶ ACL ⟶ Literature ⟶ ICL 1906A manuals ⟶ SPROGS

ACL ACD C&A INF CCD CISD Archives

Applications Associates Literature Society Technology Software revisited

Early history □ Minutes of committee meetings □ Progress reports □ Other reports □ News cuttings □ In-house publications □ Committee papers □ Personal recollections □ ACL publications □ Books □ Early Atlas publications □ FR80 reports □ Atlas manuals □ ICL1906A manuals □ Other manuals

Overview □ ICL1906A reference manual □ CAMPER (Computer Aided Movie Perspectives) □ CASS (Computer-Aided Sound Synthesis) □ COCOA □ FOG manual □ FR80 user manual □ GROATS (Graphics system) □ PIGS □ PLASYD □ SMOG □ SMOG/SPROGS primer □ SOL □ SPROGS (SD4020 PDP15 Rapid Output Graphics System) □ SPROGS supplement □ TASK □ TREE-META translator writing system

Chapter 14: FUTURE EXTENSIONS

The following extensions to SPROGS are currently under discussion.

14.1 SPROGS Variables

At the moment, only global variables have been defined. It is proposed to define a set of local variables which, although similar in form to global variables, will be accessible only within the file in which they are defined. It will be possible to pass values across to local variables and receive values in return, thus making a DRAW inside a file act as a subroutine call.

14.2 Hewlett-Packard Plotter

ACL is obtaining one of the Teletype-compatible pen plotters from Hewlett-Packard. This device will be incorporated into the SPROGS device set.

14.3 PDPI5 Link

A British Standard Interface is currently being tested to link the PDP15, with its VT04 refresh display, to the 1906A. When complete, a system will be developed in the PDP15 to connect to SPROGS. The PDP15 will look like another output device to a SPROGS program in the 1906A, and hence pictures can be sent across. Alternatively, the PDP15 can get files from the 1906A. The pictures can be displayed on the VT04, where they can be altered before being sent back to the 1906A.

14.4 Data Mode

Commands will be accepted from input streams as well as from file. This will enable the PDP15 to communicate with the 1906A.

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