词条 | BASIC 8 |
释义 |
BASIC 8 (or BASIC 8.0){{snd}} "The Enhanced Graphics System For The C128"{{snd}} developed by Walrusoft of Gainesville, Florida and published in 1986 by Patech Software of Somerset, New Jersey, USA, was an extension of Commodore's BASIC 7.0 for the C128 home/personal computer. BASIC 8.0 provided commands lacking in BASIC 7.0 to generate (color) graphics in the C128's high-resolution 80-column mode (640×200 pixels) for RGB monitors. The BASIC 8 package was developed by Walrusoft's Louis Wallace and David Darus, with contributions from Ken French (printer drivers) and indirectly from Richard Rylander (who allowed his 3D solids commands for the C64, originally published in Dr. Dobb's Journal, to be converted to the C128's hi-res mode). Background and description{{tone|section|date=April 2017}}The problemOne of the primary critiques of Commodore's computers was that their BASIC programming language dialects lacked easy sound, graphics, and input device commands, like their competitors in the Apple II and Atari 8-bit families{{snd}} requiring obscure PEEK and POKE sequences, or machine language routines, to generate high-resolution graphics, sound and music, or read from joysticks and paddles. The BASIC 2.0 of the Commodore 64, totally devoid of sound and graphics commands, induced the development of many third-party language extensions, such as Simons' BASIC, enabling non-expert users to enter the world of computer graphics. When the C128 was launched, its BASIC 7.0 contained a host of sound and graphics commands. However, they only worked in the "40-column" video mode, i.e. the TV/composite monitor mode with a resolution equal to the C64's. Users who wanted to program graphics in the C128's new high-resolution "80-column mode", primarily intended for RGBI monitors, found themselves in an even worse position than previously with the C64, since the C128's 8563 VDC graphics chip was much harder to program than the VIC-II.{{ref|vdc-vs-vic-ii}} A solutionBASIC 8.0 filled in the gap. It came on floppy disk and ROM chip versions, and provided many graphics commands that were competitive with the C128's opposition in the high-end 8-bit microcomputer market. BASIC 8.0 was fully compatible with the various first-party RAM and video RAM expansion chips and cartridges, as well as mice and joysticks. In addition, it had basic 3D graphics commands.[2] Along with a 188-page manual, the included software package included a BASIC 8.0 example of a GUI, and a BASIC 8.0 based high-res paint program, Basic Paint. Source code, copy protectionSource code of some of the BASIC 8 package was provided, and the BASIC 8.0 disk lacked any sort of copy protection, but this was before the Open Source Initiative; it was done as a courtesy. Instead of threatening legal action, Walrusoft simply asked users not to copy the software in the documentation. It worked; BASIC 8.0 became one of the best selling expansions for the C128.{{fact|date=July 2014}} Sample commandsIn BASIC 8.0, all added commands were prefaced with the @ mark, which was not normally used in Commodore BASIC, to distinguish between the original and the new keywords.
References notes and citationsReferences
Notes
Citations1. ^1 {{cite web|title=Walrusoft Basic 8|website=Retro Commodore|date=28 March 2010|access-date=11 March 2019|url=https://www.retrocommodore.com/en/articles/walrusoft-basic-8.html|dead-url=no|archive-url=https://web.archive.org/web/20180920235959/https://www.retrocommodore.com/en/articles/walrusoft-basic-8.html|archive-date=20 September 2018|df=dmy-all}} [1]}} External links
2 : BASIC extensions|Commodore 128 software |
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