Multi-user BASIC: Difference between revisions
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'''Multi-user BASIC''' was a dialect of the [[BASIC]] language for the [[Digital Equipment Corporation|DEC]] [[PDP-11]] running the [[RT-11]] [[operating system]].<ref>[https://books.google.com.au/books?id=WYDdQcbrF5wC&lpg=PA36&ots=B1FVTKAOeG&dq=Multi-user%20BASIC%20DEC%20PDP-11%20%20RT-11%20operating%20system&pg=PA36#v=onepage&q=Multi-user%20BASIC%20DEC%20PDP-11%20%20RT-11%20operating%20system&f=false At a Low-Range Price PDP-11 V03 Gives Mid-Range Performance], By Hillel Segal, Computerworld, 16 Jun 1980, Page 36</ref><ref>[https://books.google.com.au/books?id=hkQXBQAAQBAJ&lpg=PA159&ots=FefBP_eVz3&dq=%22Multi-user%20BASIC%22%20DEC%20PDP-11&pg=PA159#v=onepage&q=%22Multi-user%20BASIC%22%20DEC%20PDP-11&f=false Computers in Analytical Chemistry], edited by R Belcher, Page 159, ''Typically, the most common are....Multi-user Basic,...''</ref> One or more users were supported in separate address spaces sharing the same language interpreter. The syntax of the language was similar to but not identical to [[BASIC-11]]. A key language element was the support for virtual files. These were similar to the virtual arrays in [[BASIC-PLUS]] in but more limited. An array of integers, floatingpoint, or character strings of length 1, 2, 4, 8, 16, 32, or 64 could be placed in file and accessed with a subscript. The file could actually be opened (or re-opened) with a different definition allowing integers, characters, and floating point numbers to be stored in the same file. |
'''Multi-user BASIC''' was a dialect of the [[BASIC]] language for the [[Digital Equipment Corporation|DEC]] [[PDP-11]] running the [[RT-11]] [[operating system]].<ref>[https://books.google.com.au/books?id=WYDdQcbrF5wC&lpg=PA36&ots=B1FVTKAOeG&dq=Multi-user%20BASIC%20DEC%20PDP-11%20%20RT-11%20operating%20system&pg=PA36#v=onepage&q=Multi-user%20BASIC%20DEC%20PDP-11%20%20RT-11%20operating%20system&f=false At a Low-Range Price PDP-11 V03 Gives Mid-Range Performance], By Hillel Segal, Computerworld, 16 Jun 1980, Page 36</ref><ref>[https://books.google.com.au/books?id=hkQXBQAAQBAJ&lpg=PA159&ots=FefBP_eVz3&dq=%22Multi-user%20BASIC%22%20DEC%20PDP-11&pg=PA159#v=onepage&q=%22Multi-user%20BASIC%22%20DEC%20PDP-11&f=false Computers in Analytical Chemistry], edited by R Belcher, Page 159, ''Typically, the most common are....Multi-user Basic,...''</ref> One or more users were supported in separate address spaces sharing the same language interpreter. The syntax of the language was similar to but not identical to [[BASIC-11]]. A key language element was the support for virtual files. These were similar to the virtual arrays in [[BASIC-PLUS]] in but more limited. An array of integers, floatingpoint, or character strings of length 1, 2, 4, 8, 16, 32, or 64 could be placed in file and accessed with a subscript. The file could actually be opened (or re-opened) with a different definition allowing integers, characters, and floating point numbers to be stored in the same file. |
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Revision as of 01:31, 31 May 2020
 | This article needs additional citations for verification. (February 2017) |
Multi-user BASIC was a dialect of the BASIC language for the DEC PDP-11 running the RT-11 operating system.[1][2] One or more users were supported in separate address spaces sharing the same language interpreter. The syntax of the language was similar to but not identical to BASIC-11. A key language element was the support for virtual files. These were similar to the virtual arrays in BASIC-PLUS in but more limited. An array of integers, floatingpoint, or character strings of length 1, 2, 4, 8, 16, 32, or 64 could be placed in file and accessed with a subscript. The file could actually be opened (or re-opened) with a different definition allowing integers, characters, and floating point numbers to be stored in the same file.
Like BASIC-11, Multi-User BASIC provided some support for lab equipment, support for character terminals (LA30, VT100). Because it was a multi-user system, it did not support real-time data collection.fw.max_users=3 fw.show_multiuserui=1
References
- ^ At a Low-Range Price PDP-11 V03 Gives Mid-Range Performance, By Hillel Segal, Computerworld, 16 Jun 1980, Page 36
- ^ Computers in Analytical Chemistry, edited by R Belcher, Page 159, Typically, the most common are....Multi-user Basic,...
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