This page (revision-114) was last changed on 24-Feb-2023 14:10 by Andreas Tartz 

This page was created on 08-Mar-2010 20:15 by Carsten Strotmann

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Version Date Modified Size Author Changes ... Change note
114 24-Feb-2023 14:10 18 KB Andreas Tartz to previous
113 24-Feb-2023 13:11 18 KB Andreas Tartz to previous | to last
112 24-Feb-2023 13:09 18 KB Andreas Tartz to previous | to last
111 24-Feb-2023 13:06 17 KB Andreas Tartz to previous | to last
110 24-Feb-2023 12:57 17 KB Andreas Tartz to previous | to last
109 24-Feb-2023 12:53 17 KB Andreas Tartz to previous | to last
108 24-Feb-2023 12:38 17 KB Andreas Tartz to previous | to last
107 03-Feb-2023 15:21 17 KB Maury Markowitz to previous | to last
106 13-Dec-2021 16:05 17 KB Maury Markowitz to previous | to last
105 16-Sep-2021 13:46 17 KB Maury Markowitz to previous | to last
104 16-Sep-2021 13:30 17 KB Maury Markowitz to previous | to last general cleanup
103 29-Jul-2020 21:57 17 KB Peter Dell to previous | to last TURBO-BASIC XL ==> Turbo-BASIC XL
102 23-May-2020 05:03 17 KB Roland B. Wassenberg to previous | to last
101 01-May-2020 02:03 17 KB Roland B. Wassenberg to previous | to last

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Atari BASIC
Atari BASIC

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Atari BASIC is the "standard" BASIC dialect for the 8-bit series. It was originally sold separately from the machines in a (relatively expensive) 8kB ROM cartridge. Starting with the Atari 1200XL, the ROMs were included inside the machine. There are three versions, Revision A, B and C, which fixed various bugs.
Atari BASIC is the "standard" BASIC dialect for the 8-bit series. It was originally sold separately from the machines in a (relatively expensive) 8kB ROM cartridge. Starting with the 1200XL, the ROMs were included inside the machine. There are three versions, the original Revision A, and the updated B and C which fixed various bugs.
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Atari BASIC was written by Shepardson Microsystems in late 1978 as part of a somewhat rushed effort to make a BASIC that would fit in an 8kB ROM. The standard BASIC of the era, Microsoft's "8k basic", was actually closer to 9kB, and the most common versions were about 11kB. In spite of their best efforts, Atari programmers failed to pare it to 8kB, and hired Shepardson to do it for them.
Atari BASIC was priginally written by Shepardson Microsystems in late 1978 as part of a somewhat rushed effort to make a BASIC that would fit in an 8kB ROM. The standard BASIC of the era, Microsoft's "8k basic", was actually around 9kB, and the most common versions were about 11kB. In spite of their best efforts, Atari programmers failed to pare it to 8kB, and hired Shepardson to do it for them.
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Shepardson cut some features and added others to take advantage of some of the features of the new machine. The result required about 10kB, so to cross the remaining gap, some of the core libraries were moved out of the language and into the operating system ROMs. This had the side-effect of allowing any other language on the Atari to use these routines as well.
Shepardson cut some features and added others to provide access to the capabilities of the new machine. The result required about 10kB, so to cross the remaining gap to 8kB, some of the core libraries were moved out of the language and into the operating system ROMs. This had the side-effect of allowing any other language on the Atari to use these routines as well.
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Among the code moved to the OS ROMs was the floating point system, which was based on a 6-byte format. MS BASIC was also available in this format, but almost all examples found in contemporary machines used an expanded 9-byte format. The floating point code was also notoriously slow, and this had a significant performance impact on almost all programs.
Among the code moved to the OS ROMs was the floating point system, which was based on a 6-byte format. The 9kB version of MS BASIC also used this format, while the much more common 11kB version used an expanded 9-byte format. The Shepardson floating point code was notoriously slow, and this had a significant performance impact on almost all programs.
This page (revision-114) was last changed on 24-Feb-2023 14:10 by Andreas Tartz  Top