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:''This product is widely, but incorrectly, called "Simon's BASIC", because of confusion between the first name "Simon" and the surname "Simons"''. Simons' BASIC was an extension to BASIC 2.0 for the Commodore 64 home computer. Written by 16-year-old British programmer David Simons in 1983, it was distributed by Commodore in cartridge format. == Features == Simons' BASIC added 114 additional keywords to BASIC 2.0.〔Simons' Basic User Manual (Published by Commodore)〕 These included commands to ease the coding of sprites, high-resolution and multicolour graphics, and sound. In addition, commands were also implemented to aid in structured programming. Keywords to assist in writing and editing BASIC programs, similar to those in the VIC-20 Programmer's Aid cartridge, were also included. Also, programs written in Simons' BASIC could employ hexadecimal numbers in assignments and calculations by including a $ prefix, or binary numbers by utilizing a % prefix. Because a portion of the cartridge data was mapped into memory at addresses $8000–$9FFF, which overlapped part of the standard C64 BASIC RAM, the amount of available memory for BASIC programs was 8 KB less than that of a standard C64 configuration. A further extension to the Commodore V2 Basic was also written by Simons and released by Commodore on floppy disk as Simons' Basic 2. It could not be released on cartridge because the original Simons' Basic cartridge had to be present in order to use the extension. Simons' Basic 2 added 91 extra commands including a much coveted RENUMber command which also took care of renumbering the destinations of GOTO and GOSUB statements.〔Simons' Basic 2 User Manual (Published by Commodore)〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Simons' BASIC」の詳細全文を読む スポンサード リンク
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