Īpple BASIC was included directly in the ROM of the Apple II computer, released in 1977. However, it was not compatible with the dialect of Microsoft BASIC that Bill Gates had based on Digital Equipment Corporation's BASIC-PLUS. As games at the time mainly relied on integer functions, he implemented a small virtual machine called "Sweet 16" to support 16-bit integers. Because the standard configuration of the Apple I only contained 4KB of RAM, Wozniak did not have enough room to implement floating-point instructions, which he said also saved himself a few weeks' worth of development time. In 1976, Apple BASIC was provided to Apple I owners on a cassette tape that took about 30 seconds to load. Preliminary Apple BASIC users manual, dated October 1976 The first program that Wozniak tested on the Apple I's BASIC interpreter was an early Star Trek text game the source code had already been ported to HP BASIC for the HP 2000C minicomputer. Wozniak designed the Apple I around this implementation of BASIC, but was unable to afford a compiler at the time, so he hand assembled the instructions which he coded directly into machine language for the MOS 6502 processor. Wozniak assembled folders of papers for his BASIC design, which was based on a dialect developed for minicomputers by Hewlett-Packard, where Wozniak worked at the time.
BASIC PROGRAMMING LANGUAGE EMULATOR MAC SOFTWARE
The Celebration Apple-1 BASIC Cassette TapeĪfter working on the video game hardware of Breakout with Steve Jobs at Atari in 1975, Wozniak started work on Game BASIC so he could write games in software without resorting to machine language.
0 kommentar(er)
