>>264 >>1

少なくとも1974年時点にビル・ゲイツとポール・アレンはアセンブリ言語でBASICのインタプリター
（自作シミュレーター上）を開発できる能力はあったことになる

Paul Allen and Bill Gates, childhood friends with a passion for computer programming, sought to make a successful
business utilizing their shared skills.[16] In 1972 they founded their first company, named Traf-O-Data, which
offered a rudimentary computer that tracked and analyzed automobile traffic data. Allen went on to pursue a degree
in computer science at Washington State University, later dropping out of school to work at Honeywell. Gates began
studies at Harvard.[17] The January 1975 issue of Popular Electronics featured Micro Instrumentation and Telemetry
Systems's (MITS) Altair 8800 microcomputer.[18] Allen suggested that they could program a BASIC interpreter for
the device; after a call from Gates claiming to have a working interpreter, MITS requested a demonstration. Since
they didn't actually have one, Allen worked on a simulator for the Altair while Gates developed the interpreter.
Although they developed the interpreter on a simulator and not the actual device, the interpreter worked flawlessly
when they demonstrated the interpreter to MITS in Albuquerque, New Mexico in March 1975; MITS agreed to distribute
it, marketing it as Altair BASIC

http://www.itworld.com/article/2872659/the-source-code-behind-microsoft-basic-for-6502-comes-to-light.html